[Freeipa-users] Freeipa 4.2.0 hangs intermittently

thierry bordaz tbordaz at redhat.com
Tue Sep 6 09:31:07 UTC 2016


Hi,

The following thread is hanging most of the others threads

    Thread 20 (Thread 0x7f68007f8700 (LWP 4873)):
    #0  0x00007f683d0506d5 in pthread_cond_wait@@GLIBC_2.3.2 () from
    /lib64/libpthread.so.0
    #1  0x00007f68375ac2f3 in __db_hybrid_mutex_suspend () from
    /lib64/libdb-5.3.so
    #2  0x00007f68375ab640 in __db_tas_mutex_lock () from
    /lib64/libdb-5.3.so
    #3  0x00007f68376c5e1b in __memp_fget () from /lib64/libdb-5.3.so
    #4  0x00007f68375c9211 in __bam_search () from /lib64/libdb-5.3.so
    #5  0x00007f68375b4256 in __bamc_search () from /lib64/libdb-5.3.so
    #6  0x00007f68375b86c4 in __bamc_put () from /lib64/libdb-5.3.so
    #7  0x00007f683766f6d5 in __dbc_iput () from /lib64/libdb-5.3.so
    #8  0x00007f683766aa0e in __db_put () from /lib64/libdb-5.3.so
    #9  0x00007f683767ffa4 in __db_put_pp () from /lib64/libdb-5.3.so
    #10 0x00007f6832b5a4cf in idl_new_insert_key () from
    /usr/lib64/dirsrv/plugins/libback-ldbm.so
    #11 0x00007f6832b695b5 in addordel_values_sv.isra.3 () from
    /usr/lib64/dirsrv/plugins/libback-ldbm.so
    #12 0x00007f6832b6a25a in index_addordel_values_ext_sv () from
    /usr/lib64/dirsrv/plugins/libback-ldbm.so
    #13 0x00007f6832b6a694 in index_addordel_values_sv () from
    /usr/lib64/dirsrv/plugins/libback-ldbm.so
    #14 0x00007f6832b6a75a in index_addordel_entry () from
    /usr/lib64/dirsrv/plugins/libback-ldbm.so
    #15 0x00007f6832b6d5fa in ldbm_back_add () from
    /usr/lib64/dirsrv/plugins/libback-ldbm.so
    #16 0x00007f683f46fcca in op_shared_add () from
    /usr/lib64/dirsrv/libslapd.so.0
    #17 0x00007f683f471020 in do_add () from /usr/lib64/dirsrv/libslapd.so.0
    #18 0x00007f683f99c303 in connection_threadmain ()
    #19 0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
    #20 0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
    #21 0x00007f683cd7a28d in clone () from /lib64/libc.so.6

This thread is likely not hang on 'db_tas_mutex_lock' as the db_lock 
does not show it waiting for something.
Unfortunately it is not shown in the output of top -H, did you get the 
complete output ?
Ludwig mentioned a known issue that DS is not scaling well on NUMA arch, 
do you know if the machine is NUMA ?
A possibility is that this thread get severely slowed down by a NUMA 
remote lock and showing DS has hung.
This is why it would be interesting to know if it consums CPU.

thanks
theirry

On 09/06/2016 10:59 AM, Rakesh Rajasekharan wrote:
> Hi Thierry/Ludwig,
>
> I again hit the hang issue. This is the pstack of the ns-slapd
>
> So was able to this time get the pstack and db locks
>
> db locks details
> Default locking region information:
> 451        Last allocated locker ID
> 0x7fffffff         Current maximum unused locker ID
> 9          Number of lock modes
> 800        Initial number of locks allocated
> 0          Initial number of lockers allocated
> 800        Initial number of lock objects allocated
> 10000      Maximum number of locks possible
> 10000      Maximum number of lockers possible
> 10000      Maximum number of lock objects possible
> 800        Current number of locks allocated
> 366        Current number of lockers allocated
> 800        Current number of lock objects allocated
> 160        Number of lock object partitions
> 8191       Size of object hash table
> 126        Number of current locks
> 1005       Maximum number of locks at any one time
> 33         Maximum number of locks in any one bucket
> 3987       Maximum number of locks stolen by for an empty partition
> 75         Maximum number of locks stolen for any one partition
> 309        Number of current lockers
> 313        Maximum number of lockers at any one time
> 121        Number of current lock objects
> 676        Maximum number of lock objects at any one time
> 3          Maximum number of lock objects in any one bucket
> 69         Maximum number of objects stolen by for an empty partition
> 5          Maximum number of objects stolen for any one partition
> 22M        Total number of locks requested (22009642)
> 21M        Total number of locks released (21992878)
> 0          Total number of locks upgraded
> 95         Total number of locks downgraded
> 3348       Lock requests not available due to conflicts, for which we 
> waited
> 12646      Lock requests not available due to conflicts, for which we 
> did not wait
> 0          Number of deadlocks
> 0          Lock timeout value
> 0          Number of locks that have timed out
> 0          Transaction timeout value
> 0          Number of transactions that have timed out
> 2MB 560KB          Region size
> 71719      The number of partition locks that required waiting (0%)
> 23105      The maximum number of times any partition lock was waited 
> for (0%)
> 0          The number of object queue operations that required waiting 
> (0%)
> 163        The number of locker allocations that required waiting (0%)
> 3172       The number of region locks that required waiting (0%)
> 5          Maximum hash bucket length
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
> Lock REGINFO information:
> Environment        Region type
> 1          Region ID
> /var/lib/dirsrv/slapd-SPRINKLR-COM/db/__db.001 Region name
> 0x7f67ef869000     Region address
> 0x7f67ef8690a0     Region allocation head
> 0x7f67ef8712b0     Region primary address
> 0          Region maximum allocation
> 0          Region allocated
> Region allocations: 1581345 allocations, 0 failures, 1580794 frees, 6 
> longest
> Allocations by power-of-two sizes:
>   1KB      1581329
>   2KB      3
>   4KB      4
>   8KB      3
>  16KB      3
>  32KB      1
>  64KB      0
> 128KB      0
> 256KB      2
> 512KB      0
> 1024KB     1
> REGION_SHARED      Region flags
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
> Lock region parameters:
> 2          Lock region region mutex [3172/14M 0% !Own] <wakeups 0/1143>
> 16381      locker table size
> 8191       object table size
> 34128      obj_off
> 900216     locker_off
> 0          need_dd
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
> Lock conflict matrix:
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
> Locks grouped by lockers:
> Locker   Mode      Count Status  ----------------- Object ---------------
>        2 dd=308 locks held 1    write locks 0 pid/thread 
> 4845/140085720139840 flags 10   priority 100
>        2 READ          1 HELD userRoot/id2entry.db      handle        0
>        3 dd=307 locks held 0    write locks 0 pid/thread 
> 4845/140084829472512 flags 0    priority 100
>        4 dd=306 locks held 1    write locks 0 pid/thread 
> 4845/140085720139840 flags 10   priority 100
>        4 READ          1 HELD ipaca/id2entry.db         handle        0
>        5 dd=305 locks held 0    write locks 0 pid/thread 
> 4845/140084837865216 flags 0    priority 100
>        6 dd=304 locks held 1    write locks 0 pid/thread 
> 4845/140085720139840 flags 10   priority 100
>        6 READ          1 HELD ipaca/entryrdn.db         handle        0
>        7 dd=303 locks held 0    write locks 0 pid/thread 
> 4845/140084804294400 flags 0    priority 100
>        8 dd=302 locks held 0    write locks 0 pid/thread 
> 4845/140084720432896 flags 0    priority 100
>        9 dd=301 locks held 0    write locks 0 pid/thread 
> 4845/140084837865216 flags 0    priority 100
>        a dd=300 locks held 1    write locks 0 pid/thread 
> 4845/140085720139840 flags 10   priority 100
>        a READ          1 HELD ipaca/vlv#allcertspkitomcatindex.db 
> handle        0
>        e dd=299 locks held 1    write locks 0 pid/thread 
> 4845/140085720139840 flags 10   priority 100
>        e READ          1 HELD 
> ipaca/vlv#allnonrevokedcertspkitomcatindex.db handle        0
>       10 dd=298 locks held 1    write locks 0 pid/thread 
> 4845/140085720139840 flags 10   priority 100
>       10 READ          1 HELD 
> ipaca/vlv#allrevokedcertspkitomcatindex.db handle 0
>       11 dd=297 locks held 1    write locks 0 pid/thread 
> 4845/140085720139840 flags 10   priority 100
>       11 READ          1 HELD 
> ipaca/vlv#allrevokedcertsnotafterpkitomcatindex.db handle        0
>       14 dd=296 locks held 1    write locks 0 pid/thread 
> 4845/140085720139840 flags 10   priority 100
>       14 READ          1 HELD 
> ipaca/vlv#allrevokedorrevokedexpiredcertspkitomcatindex.db handle        0
>       15 dd=295 locks held 1    write locks 0 pid/thread 
> 4845/140085720139840 flags 10   priority 100
>       15 READ          1 HELD ipaca/vlv#allvalidcertspkitomcatindex.db 
> handle        0
>       16 dd=294 locks held 1    write locks 0 pid/thread 
> 4845/140085720139840 flags 10   priority 100
>       16 READ          1 HELD 
> ipaca/vlv#allvalidcertsnotafterpkitomcatindex.db handle        0
>       17 dd=293 locks held 1    write locks 0 pid/thread 
> 4845/140085720139840 flags 10   priority 100
>       17 READ          1 HELD 
> ipaca/vlv#allvalidorrevokedcertspkitomcatindex.db handle        0
>       18 dd=292 locks held 1    write locks 0 pid/thread 
> 4845/140085720139840 flags 10   priority 100
>       18 READ          1 HELD ipaca/vlv#caallpkitomcatindex.db 
> handle        0
>       1d dd=291 locks held 1    write locks 0 pid/thread 
> 4845/140085720139840 flags 10   priority 100
>       1d READ          1 HELD ipaca/vlv#cacompletepkitomcatindex.db 
> handle        0
>       1e dd=290 locks held 1    write locks 0 pid/thread 
> 4845/140085720139840 flags 10   priority 100
>       1e READ          1 HELD 
> ipaca/vlv#cacompleteenrollmentpkitomcatindex.db handle        0
>       20 dd=289 locks held 1    write locks 0 pid/thread 
> 4845/140085720139840 flags 10   priority 100
>       20 READ          1 HELD 
> ipaca/vlv#cacompleterevocationpkitomcatindex.db handle        0
>       21 dd=288 locks held 1    write locks 0 pid/thread 
> 4845/140085720139840 flags 10   priority 100
>       21 READ          1 HELD ipaca/vlv#caenrollmentpkitomcatindex.db 
> handle        0
>       2b dd=287 locks held 1    write locks 0 pid/thread 
> 4845/140085720139840 flags 10   priority 100
>       2b READ          1 HELD ipaca/vlv#carevocationpkitomcatindex.db 
> handle        0
>       2c dd=286 locks held 1    write locks 0 pid/thread 
> 4845/140085720139840 flags 10   priority 100
>       2c READ          1 HELD changelog/id2entry.db     handle        0
>       2d dd=285 locks held 0    write locks 0 pid/thread 
> 4845/140085719607040 flags 0    priority 100
>       2e dd=284 locks held 1    write locks 0 pid/thread 
> 4845/140085720139840 flags 10   priority 100
>       2e READ          1 HELD changelog/entryusn.db     handle        0
>       2f dd=283 locks held 0    write locks 0 pid/thread 
> 4845/140085720139840 flags 0    priority 100
>       30 dd=282 locks held 1    write locks 0 pid/thread 
> 4845/140085720139840 flags 10   priority 100
>       30 READ          1 HELD userRoot/entryusn.db      handle        0
>       31 dd=281 locks held 0    write locks 0 pid/thread 
> 4845/140085720139840 flags 0    priority 100
>       32 dd=280 locks held 1    write locks 0 pid/thread 
> 4845/140085720139840 flags 10   priority 100
>       32 READ          1 HELD ipaca/entryusn.db         handle        0
>       33 dd=279 locks held 0    write locks 0 pid/thread 
> 4845/140085720139840 flags 0    priority 100
>       34 dd=278 locks held 1    write locks 0 pid/thread 
> 4845/140085720139840 flags 10   priority 100
>       34 READ          1 HELD userRoot/entryrdn.db      handle        0
>       35 dd=277 locks held 0    write locks 0 pid/thread 
> 4845/140084544186112 flags 0    priority 100
>       36 dd=276 locks held 0    write locks 0 pid/thread 
> 4845/140084636505856 flags 0    priority 100
>       37 dd=275 locks held 0    write locks 0 pid/thread 
> 4845/140084854650624 flags 0    priority 100
>       38 dd=274 locks held 1    write locks 0 pid/thread 
> 4845/140085720139840 flags 10   priority 100
>       38 READ          1 HELD userRoot/objectclass.db   handle        0
>       39 dd=273 locks held 0    write locks 0 pid/thread 
> 4845/140084569364224 flags 0    priority 100
>       3a dd=272 locks held 1    write locks 0 pid/thread 
> 4845/140085720139840 flags 10   priority 100
>       3a READ          1 HELD userRoot/ancestorid.db    handle        0
>       3b dd=271 locks held 0    write locks 0 pid/thread 
> 4845/140084854650624 flags 0    priority 100
>       3c dd=270 locks held 1    write locks 0 pid/thread 
> 4845/140085720139840 flags 10   priority 100
>       3c READ          1 HELD changelog/entryrdn.db     handle        0
>       3d dd=269 locks held 0    write locks 0 pid/thread 
> 4845/140085719607040 flags 0    priority 100
>       3e dd=268 locks held 0    write locks 0 pid/thread 
> 4845/140084602935040 flags 0    priority 100
>       3f dd=267 locks held 0    write locks 0 pid/thread 
> 4845/140085719607040 flags 0    priority 100
>       40 dd=266 locks held 1    write locks 0 pid/thread 
> 4845/140085720139840 flags 10   priority 100
>       40 READ          1 HELD changelog/objectclass.db  handle        0
>       41 dd=265 locks held 0    write locks 0 pid/thread 
> 4845/140085719607040 flags 0    priority 100
>       42 dd=264 locks held 0    write locks 0 pid/thread 
> 4845/140085719607040 flags 0    priority 100
>       43 dd=263 locks held 0    write locks 0 pid/thread 
> 4845/140084653291264 flags 0    priority 100
>       44 dd=262 locks held 1    write locks 0 pid/thread 
> 4845/140085720139840 flags 10   priority 100
>       44 READ          1 HELD ipaca/objectclass.db      handle        0
>       45 dd=261 locks held 0    write locks 0 pid/thread 
> 4845/140084577756928 flags 0    priority 100
>       46 dd=260 locks held 0    write locks 0 pid/thread 
> 4845/140084720432896 flags 0    priority 100
>       47 dd=259 locks held 1    write locks 0 pid/thread 
> 4845/140085720139840 flags 10   priority 100
>       47 READ          1 HELD changelog/aci.db          handle        0
>       48 dd=258 locks held 0    write locks 0 pid/thread 
> 4845/140085720139840 flags 0    priority 100
>       49 dd=257 locks held 1    write locks 0 pid/thread 
> 4845/140085720139840 flags 10   priority 100
>       49 READ          1 HELD userRoot/aci.db           handle        0
>       4a dd=256 locks held 0    write locks 0 pid/thread 
> 4845/140085720139840 flags 0    priority 100
>       4b dd=255 locks held 0    write locks 0 pid/thread 
> 4845/140084535793408 flags 0    priority 100
>       4c dd=254 locks held 1    write locks 0 pid/thread 
> 4845/140085720139840 flags 10   priority 100
>       4c READ          1 HELD ipaca/aci.db              handle        0
>       4d dd=253 locks held 0    write locks 0 pid/thread 
> 4845/140085720139840 flags 0    priority 100
>       4e dd=252 locks held 1    write locks 0 pid/thread 
> 4845/140085720139840 flags 10   priority 100
>       4e READ          1 HELD userRoot/parentid.db      handle        0
>       4f dd=251 locks held 0    write locks 0 pid/thread 
> 4845/140085720139840 flags 0    priority 100
>       50 dd=250 locks held 0    write locks 0 pid/thread 
> 4845/140085719607040 flags 0    priority 100
>       51 dd=249 locks held 1    write locks 0 pid/thread 
> 4845/140085720139840 flags 10   priority 100
>       51 READ          1 HELD changelog/nsuniqueid.db   handle        0
>       52 dd=248 locks held 1    write locks 0 pid/thread 
> 4845/140085720139840 flags 10   priority 100
>       52 READ          1 HELD changelog/changenumber.db handle        0
>       53 dd=247 locks held 0    write locks 0 pid/thread 
> 4845/140084602935040 flags 0    priority 100
>       54 dd=246 locks held 0    write locks 0 pid/thread 
> 4845/140085719607040 flags 0    priority 100
>       55 dd=245 locks held 1    write locks 0 pid/thread 
> 4845/140085719607040 flags 10   priority 100
>       55 READ          1 HELD changelog/targetuniqueid.db handle        0
>       56 dd=244 locks held 1    write locks 0 pid/thread 
> 4845/140085719607040 flags 10   priority 100
>       56 READ          1 HELD changelog/parentid.db     handle        0
>       57 dd=243 locks held 1    write locks 0 pid/thread 
> 4845/140085719607040 flags 10   priority 100
>       57 READ          1 HELD changelog/ancestorid.db   handle        0
>       58 dd=242 locks held 1    write locks 0 pid/thread 
> 4845/140085719607040 flags 10   priority 100
>       58 READ          1 HELD changelog/numsubordinates.db handle        0
>       59 dd=241 locks held 0    write locks 0 pid/thread 
> 4845/140085719607040 flags 0    priority 100
>       5a dd=240 locks held 0    write locks 0 pid/thread 
> 4845/140084544186112 flags 0    priority 100
>       5b dd=239 locks held 1    write locks 0 pid/thread 
> 4845/140084577756928 flags 10   priority 100
>       5b READ          1 HELD userRoot/krbPrincipalName.db handle        0
>       5c dd=238 locks held 0    write locks 0 pid/thread 
> 4845/140084636505856 flags 0    priority 100
>       5d dd=237 locks held 0    write locks 0 pid/thread 
> 4845/140084695254784 flags 0    priority 100
>       5e dd=236 locks held 1    write locks 0 pid/thread 
> 4845/140084560971520 flags 10   priority 100
>       5e READ          1 HELD userRoot/ipakrbprincipalalias.db 
> handle        0
>       5f dd=235 locks held 0    write locks 0 pid/thread 
> 4845/140084703647488 flags 0    priority 100
>       60 dd=234 locks held 0    write locks 0 pid/thread 
> 4845/140084653291264 flags 0    priority 100
>       61 dd=233 locks held 0    write locks 0 pid/thread 
> 4845/140084577756928 flags 0    priority 100
>       62 dd=232 locks held 0    write locks 0 pid/thread 
> 4845/140084686862080 flags 0    priority 100
>       63 dd=231 locks held 1    write locks 0 pid/thread 
> 4845/140084611327744 flags 10   priority 100
>       63 READ          1 HELD changelog/seeAlso.db      handle        0
>       64 dd=230 locks held 0    write locks 0 pid/thread 
> 4845/140084686862080 flags 0    priority 100
>       65 dd=229 locks held 1    write locks 0 pid/thread 
> 4845/140084611327744 flags 10   priority 100
>       65 READ          1 HELD userRoot/seeAlso.db       handle        0
>       66 dd=228 locks held 0    write locks 0 pid/thread 
> 4845/140084636505856 flags 0    priority 100
>       67 dd=227 locks held 1    write locks 0 pid/thread 
> 4845/140084611327744 flags 10   priority 100
>       67 READ          1 HELD ipaca/seeAlso.db          handle        0
>       68 dd=226 locks held 0    write locks 0 pid/thread 
> 4845/140084686862080 flags 0    priority 100
>       69 dd=225 locks held 1    write locks 0 pid/thread 
> 4845/140084678469376 flags 10   priority 100
>       69 READ          1 HELD ipaca/parentid.db         handle        0
>       6a dd=224 locks held 0    write locks 0 pid/thread 
> 4845/140084678469376 flags 0    priority 100
>       6b dd=223 locks held 0    write locks 0 pid/thread 
> 4845/140084829472512 flags 0    priority 100
>       6c dd=222 locks held 0    write locks 0 pid/thread 
> 4845/140084653291264 flags 0    priority 100
>       6d dd=221 locks held 0    write locks 0 pid/thread 
> 4845/140084569364224 flags 0    priority 100
>       6e dd=220 locks held 0    write locks 0 pid/thread 
> 4845/140084636505856 flags 0    priority 100
>       6e READ          1 WAIT userRoot/objectclass.db   page         18
>       6f dd=219 locks held 0    write locks 0 pid/thread 
> 4845/140084544186112 flags 0    priority 100
>       70 dd=218 locks held 0    write locks 0 pid/thread 
> 4845/140084569364224 flags 0    priority 100
>       71 dd=217 locks held 0    write locks 0 pid/thread 
> 4845/140084619720448 flags 0    priority 100
>       72 dd=216 locks held 0    write locks 0 pid/thread 
> 4845/140084552578816 flags 0    priority 100
>       73 dd=215 locks held 0    write locks 0 pid/thread 
> 4845/140084829472512 flags 0    priority 100
>       74 dd=214 locks held 0    write locks 0 pid/thread 
> 4845/140084628113152 flags 0    priority 100
>       75 dd=213 locks held 0    write locks 0 pid/thread 
> 4845/140084686862080 flags 0    priority 100
>       76 dd=212 locks held 1    write locks 0 pid/thread 
> 4845/140084560971520 flags 10   priority 100
>       76 READ          1 HELD userRoot/ipauniqueid.db   handle        0
>       77 dd=211 locks held 0    write locks 0 pid/thread 
> 4845/140084661683968 flags 0    priority 100
>       78 dd=210 locks held 0    write locks 0 pid/thread 
> 4845/140084846257920 flags 0    priority 100
>       79 dd=209 locks held 0    write locks 0 pid/thread 
> 4845/140084628113152 flags 0    priority 100
>       7a dd=208 locks held 1    write locks 0 pid/thread 
> 4845/140084560971520 flags 10   priority 100
>       7a READ          1 HELD userRoot/nsuniqueid.db    handle        0
>       7b dd=207 locks held 1    write locks 0 pid/thread 
> 4845/140084560971520 flags 10   priority 100
>       7b READ          1 HELD userRoot/cn.db            handle        0
>       7c dd=206 locks held 1    write locks 0 pid/thread 
> 4845/140084560971520 flags 10   priority 100
>       7c READ          1 HELD userRoot/fqdn.db          handle        0
>       7d dd=205 locks held 1    write locks 0 pid/thread 
> 4845/140084560971520 flags 10   priority 100
>       7d READ          1 HELD userRoot/managedby.db     handle        0
>       7e dd=204 locks held 1    write locks 0 pid/thread 
> 4845/140084560971520 flags 10   priority 100
>       7e READ          1 HELD userRoot/numsubordinates.db handle        0
>       7f dd=203 locks held 1    write locks 0 pid/thread 
> 4845/140084678469376 flags 10   priority 100
>       7f READ          1 HELD userRoot/member.db        handle        0
>       80 dd=202 locks held 0    write locks 0 pid/thread 
> 4845/140084712040192 flags 0    priority 100
>       81 dd=201 locks held 1    write locks 0 pid/thread 
> 4845/140084678469376 flags 10   priority 100
>       81 READ          1 HELD userRoot/memberUser.db    handle        0
>       82 dd=200 locks held 0    write locks 0 pid/thread 
> 4845/140084577756928 flags 0    priority 100
>       83 dd=199 locks held 1    write locks 0 pid/thread 
> 4845/140084678469376 flags 10   priority 100
>       83 READ          1 HELD userRoot/memberHost.db    handle        0
>       84 dd=198 locks held 0    write locks 0 pid/thread 
> 4845/140084712040192 flags 0    priority 100
>       85 dd=197 locks held 0    write locks 0 pid/thread 
> 4845/140084577756928 flags 0    priority 100
>       86 dd=196 locks held 0    write locks 0 pid/thread 
> 4845/140084670076672 flags 0    priority 100
>       87 dd=195 locks held 0    write locks 0 pid/thread 
> 4845/140084577756928 flags 0    priority 100
>       88 dd=194 locks held 0    write locks 0 pid/thread 
> 4845/140084846257920 flags 0    priority 100
>       89 dd=193 locks held 0    write locks 0 pid/thread 
> 4845/140084552578816 flags 0    priority 100
>       8a dd=192 locks held 0    write locks 0 pid/thread 
> 4845/140084703647488 flags 0    priority 100
>       8b dd=191 locks held 0    write locks 0 pid/thread 
> 4845/140084544186112 flags 0    priority 100
>       8c dd=190 locks held 0    write locks 0 pid/thread 
> 4845/140084846257920 flags 0    priority 100
>       8d dd=189 locks held 0    write locks 0 pid/thread 
> 4845/140084661683968 flags 0    priority 100
>       8e dd=188 locks held 1    write locks 0 pid/thread 
> 4845/140085067675392 flags 10   priority 100
>       8e READ          1 HELD userRoot/macAddress.db    handle        0
>       8f dd=187 locks held 0    write locks 0 pid/thread 
> 4845/140085067675392 flags 0    priority 100
>       90 dd=186 locks held 0    write locks 0 pid/thread 
> 4845/140084703647488 flags 0    priority 100
>       91 dd=185 locks held 0    write locks 0 pid/thread 
> 4845/140084552578816 flags 0    priority 100
>       92 dd=184 locks held 0    write locks 0 pid/thread 
> 4845/140084560971520 flags 0    priority 100
>       92 READ          1 WAIT userRoot/objectclass.db   page          9
>       93 dd=183 locks held 0    write locks 0 pid/thread 
> 4845/140084577756928 flags 0    priority 100
>       94 dd=182 locks held 0    write locks 0 pid/thread 
> 4845/140084821079808 flags 0    priority 100
>       94 READ          1 WAIT userRoot/objectclass.db   page         18
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> 800b3a33 WRITE         1 HELD userRoot/id2entry.db      page          0
> 800b3a33 READ          3 HELD userRoot/entryrdn.db      page          3
> 800b3a33 READ          1 HELD userRoot/entryrdn.db      page         36
> 800b3a33 READ          1 HELD userRoot/entryrdn.db      page          4
> 800b3a33 READ          1 HELD userRoot/nsuniqueid.db    page         86
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
> Locks grouped by object:
> Locker   Mode      Count Status  ----------------- Object ---------------
>       a4 READ          1 HELD userRoot/ipasudorunas.db  handle        0
>
>       9e READ          1 HELD userRoot/ipaMemberCertProfile.db 
> handle        0
>
>       10 READ          1 HELD 
> ipaca/vlv#allrevokedcertspkitomcatindex.db handle 0
>
> 800b3a33 WRITE         2 HELD userRoot/id2entry.db      page       8184
>
> 800b3a33 WRITE         1 HELD userRoot/id2entry.db      page       8183
>
> 800b3a33 WRITE         1 HELD userRoot/id2entry.db      page       7779
>
>       a1 READ          1 HELD userRoot/memberdenycmd.db handle        0
>
>        a READ          1 HELD ipaca/vlv#allcertspkitomcatindex.db 
> handle        0
>
>       a7 READ          1 HELD userRoot/sourcehost.db    handle        0
>
>       57 READ          1 HELD changelog/ancestorid.db   handle        0
>
>       e5 READ          1 HELD ipaca/revInfo.db          handle        0
>
>       e6 READ          1 HELD ipaca/revokedby.db        handle        0
>
>       11 READ          1 HELD 
> ipaca/vlv#allrevokedcertsnotafterpkitomcatindex.db handle        0
>
>       4e READ          1 HELD userRoot/parentid.db      handle        0
>
>        4 READ          1 HELD ipaca/id2entry.db         handle        0
>
>       58 READ          1 HELD changelog/numsubordinates.db handle        0
>
>       67 READ          1 HELD ipaca/seeAlso.db          handle        0
>
>       2b READ          1 HELD ipaca/vlv#carevocationpkitomcatindex.db 
> handle        0
>
>       ec READ          1 HELD ipaca/requeststate.db     handle        0
>
>      11b READ          1 HELD ipaca/notbefore.db        handle        0
>
>       7e READ          1 HELD userRoot/numsubordinates.db handle        0
>
>       a2 READ          1 HELD userRoot/memberallowcmd.db handle        0
>
>       9c READ          1 HELD userRoot/owner.db         handle        0
>
>       1e READ          1 HELD 
> ipaca/vlv#cacompleteenrollmentpkitomcatindex.db handle        0
>
>      11c READ          1 HELD ipaca/notafter.db         handle        0
>
>       40 READ          1 HELD changelog/objectclass.db  handle        0
>
>       2e READ          1 HELD changelog/entryusn.db     handle        0
>
>       16 READ          1 HELD 
> ipaca/vlv#allvalidcertsnotafterpkitomcatindex.db handle        0
>
>       15 READ          1 HELD ipaca/vlv#allvalidcertspkitomcatindex.db 
> handle        0
>
>       a5 READ          1 HELD userRoot/ipaMemberCa.db   handle        0
>
>       18 READ          1 HELD ipaca/vlv#caallpkitomcatindex.db 
> handle        0
>
>       a0 READ          1 HELD userRoot/secretary.db     handle        0
>
>       81 READ          1 HELD userRoot/memberUser.db    handle        0
>
>       9f READ          1 HELD userRoot/ipaassignedidview.db 
> handle        0
>
>       a3 READ          1 HELD userRoot/manager.db       handle        0
>
>       d8 READ          1 HELD ipaca/description.db      handle        0
>
>       a8 READ          1 HELD userRoot/memberservice.db handle        0
>
>       44 READ          1 HELD ipaca/objectclass.db      handle        0
>
>       ed READ          1 HELD ipaca/dateOfCreate.db     handle        0
>
> 800b3a33 WRITE         1 HELD userRoot/id2entry.db      page          0
>
>        2 READ          1 HELD userRoot/id2entry.db      handle        0
>
>       5b READ          1 HELD userRoot/krbPrincipalName.db handle        0
>
>       ee READ          1 HELD ipaca/requesttype.db      handle        0
>
>       c8 READ          1 HELD ipaca/certstatus.db       handle        0
>
>       56 READ          1 HELD changelog/parentid.db     handle        0
>
>       83 READ          1 HELD userRoot/memberHost.db    handle        0
>
>       5e READ          1 HELD userRoot/ipakrbprincipalalias.db 
> handle        0
>
>      121 READ          1 HELD ipaca/issuedby.db         handle        0
>
>        6 READ          1 HELD ipaca/entryrdn.db         handle        0
>
>       e7 READ          1 HELD ipaca/revokedOn.db        handle        0
>
>       4c READ          1 HELD ipaca/aci.db              handle        0
>
>      11d READ          1 HELD ipaca/duration.db         handle        0
>
>       14 READ          1 HELD 
> ipaca/vlv#allrevokedorrevokedexpiredcertspkitomcatindex.db handle        0
>
>       21 READ          1 HELD ipaca/vlv#caenrollmentpkitomcatindex.db 
> handle        0
>
>       55 READ          1 HELD changelog/targetuniqueid.db handle        0
>
> 800b3a33 READ          1 HELD userRoot/entryrdn.db      page         36
>
>       2c READ          1 HELD changelog/id2entry.db     handle        0
>
> 800b3a33 READ          1 HELD userRoot/entryrdn.db      page          4
>
>       34 READ          1 HELD userRoot/entryrdn.db      handle        0
>
> 800b3a33 READ          3 HELD userRoot/entryrdn.db      page          3
>
>       eb READ          1 HELD ipaca/requestid.db        handle        0
>
>       49 READ          1 HELD userRoot/aci.db           handle        0
>
>       76 READ          1 HELD userRoot/ipauniqueid.db   handle        0
>
>       63 READ          1 HELD changelog/seeAlso.db      handle        0
>
>       7c READ          1 HELD userRoot/fqdn.db          handle        0
>
>       db READ          1 HELD ipaca/cn.db               handle        0
>
>       ef READ          1 HELD ipaca/numsubordinates.db  handle        0
>
>       32 READ          1 HELD ipaca/entryusn.db         handle        0
>
>       1d READ          1 HELD ipaca/vlv#cacompletepkitomcatindex.db 
> handle        0
>
>       dd READ          1 HELD ipaca/ancestorid.db       handle        0
>
>       a9 READ          1 HELD userRoot/ipatokenradiusconfiglink.db 
> handle        0
>
>       f0 READ          1 HELD userRoot/userCertificate.db handle        0
>
>      11a READ          1 HELD ipaca/metaInfo.db         handle        0
>
>       7d READ          1 HELD userRoot/managedby.db     handle        0
>
>       ea READ          1 HELD ipaca/nsuniqueid.db       handle        0
>
>       c5 READ          1 HELD userRoot/uidnumber.db     handle        0
>
>       d1 READ          1 HELD userRoot/nscpEntryDN.db   handle        0
>
>      120 READ          1 HELD ipaca/extension.db        handle        0
>
> 800b3a33 WRITE         1 HELD userRoot/cn.db            page        150
>
>       69 READ          1 HELD ipaca/parentid.db         handle        0
>
> 800b3a33 WRITE         1 HELD userRoot/cn.db            page        131
>
> 800b3a33 WRITE         1 HELD userRoot/cn.db            page        143
>
> 800b3a33 WRITE         2 HELD userRoot/cn.db            page        141
>
>       20 READ          1 HELD 
> ipaca/vlv#cacompleterevocationpkitomcatindex.db handle        0
>
>       8e READ          1 HELD userRoot/macAddress.db    handle        0
>
>        e READ          1 HELD 
> ipaca/vlv#allnonrevokedcertspkitomcatindex.db handle        0
>
>       17 READ          1 HELD 
> ipaca/vlv#allvalidorrevokedcertspkitomcatindex.db handle        0
>
> 800b3a33 WRITE         1 HELD userRoot/cn.db            page         30
>
> 800b3a33 WRITE         1 HELD userRoot/objectclass.db   page         14
>
> 800b3a33 WRITE         1 HELD userRoot/objectclass.db   page          9
>      116 READ          1 WAIT userRoot/objectclass.db   page          9
>      115 READ          1 WAIT userRoot/objectclass.db   page          9
>       92 READ          1 WAIT userRoot/objectclass.db   page          9
>
> 800b3a33 WRITE         1 HELD userRoot/objectclass.db   page          8
>
>       7b READ          1 HELD userRoot/cn.db            handle        0
>
> 800b3a33 WRITE         1 HELD userRoot/objectclass.db   page         11
>
> 800b3a33 WRITE         1 HELD userRoot/objectclass.db   page          7
>
> 800b3a33 WRITE         1 HELD userRoot/cn.db            page         11
>
>       38 READ          1 HELD userRoot/objectclass.db   handle        0
>
> 800b3a33 WRITE         2 HELD userRoot/objectclass.db   page          3
>
> 800b3a33 WRITE         1 HELD userRoot/cn.db            page         53
>
> 800b3a33 WRITE         1 HELD userRoot/objectclass.db   page         18
>       6e READ          1 WAIT userRoot/objectclass.db   page         18
>       94 READ          1 WAIT userRoot/objectclass.db   page         18
>
> 800b3a33 WRITE         1 HELD userRoot/cn.db            page         41
>
> 800b3a33 WRITE         1 HELD userRoot/cn.db            page         40
>
> 800b3a33 WRITE         1 HELD userRoot/cn.db            page         89
>
> 800b3a33 WRITE         1 HELD userRoot/cn.db            page        117
>
>       30 READ          1 HELD userRoot/entryusn.db      handle        0
>
>       3c READ          1 HELD changelog/entryrdn.db     handle        0
>
>       97 READ          1 HELD userRoot/uid.db           handle        0
>
>       47 READ          1 HELD changelog/aci.db          handle        0
>
>       e3 READ          1 HELD ipaca/serialno.db         handle        0
>
>       7a READ          1 HELD userRoot/nsuniqueid.db    handle        0
>
> 800b3a33 READ          1 HELD userRoot/nsuniqueid.db    page         86
>
>       51 READ          1 HELD changelog/nsuniqueid.db   handle        0
>
>      11e READ          1 HELD ipaca/subjectname.db      handle        0
>
>       7f READ          1 HELD userRoot/member.db        handle        0
>
>      11f READ          1 HELD ipaca/publicKeyData.db    handle        0
>
>       9b READ          1 HELD userRoot/uniquemember.db  handle        0
>
>       52 READ          1 HELD changelog/changenumber.db handle        0
>
>       ce READ          1 HELD userRoot/gidnumber.db     handle        0
>
>       65 READ          1 HELD userRoot/seeAlso.db       handle        0
>
>       9d READ          1 HELD userRoot/ipaallowedtarget.db handle        0
>
>       a6 READ          1 HELD userRoot/ipasudorunasgroup.db 
> handle        0
>
>       3a READ          1 HELD userRoot/ancestorid.db    handle        0
>
>
>
>
> pstack output
>
> root at ipa-master ]# pstack 4845
> Thread 44 (Thread 0x7f681dd3a700 (LWP 4847)):
> #0  0x00007f683cd719b3 in select () from /lib64/libc.so.6
> #1  0x00007f683f4fc0e9 in DS_Sleep () from /usr/lib64/dirsrv/libslapd.so.0
> #2  0x00007f6832b4a907 in deadlock_threadmain () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #3  0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #4  0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #5  0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 43 (Thread 0x7f681d539700 (LWP 4848)):
> #0  0x00007f683cd719b3 in select () from /lib64/libc.so.6
> #1  0x00007f68376d8bad in __os_yield () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #2  0x00007f68376d42b3 in __memp_sync_int () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #3  0x00007f68376e4752 in __txn_checkpoint () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #4  0x00007f68376e4b74 in __txn_checkpoint_pp () from 
> /lib64/libdb-5.3.so <http://libdb-5.3.so>
> #5  0x00007f6832b4ea87 in checkpoint_threadmain () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #6  0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #7  0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #8  0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 42 (Thread 0x7f681cd38700 (LWP 4849)):
> #0  0x00007f683cd719b3 in select () from /lib64/libc.so.6
> #1  0x00007f683f4fc0e9 in DS_Sleep () from /usr/lib64/dirsrv/libslapd.so.0
> #2  0x00007f6832b4ab7f in trickle_threadmain () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #3  0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #4  0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #5  0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 41 (Thread 0x7f681c537700 (LWP 4850)):
> #0  0x00007f683cd719b3 in select () from /lib64/libc.so.6
> #1  0x00007f683f4fc0e9 in DS_Sleep () from /usr/lib64/dirsrv/libslapd.so.0
> #2  0x00007f6832b45707 in perf_threadmain () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #3  0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #4  0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #5  0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 40 (Thread 0x7f681bb2d700 (LWP 4851)):
> #0  0x00007f683d0506d5 in pthread_cond_wait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f683d6a6050 in PR_WaitCondVar () from /lib64/libnspr4.so
> #2  0x00007f683f4eb198 in slapi_wait_condvar () from 
> /usr/lib64/dirsrv/libslapd.so.0
> #3  0x00007f683587d62e in cos_cache_wait_on_change () from 
> /usr/lib64/dirsrv/plugins/libcos-plugin.so
> #4  0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #5  0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #6  0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 39 (Thread 0x7f681b32c700 (LWP 4852)):
> #0  0x00007f683d0506d5 in pthread_cond_wait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f683d6a6050 in PR_WaitCondVar () from /lib64/libnspr4.so
> #2  0x00007f683f4eb198 in slapi_wait_condvar () from 
> /usr/lib64/dirsrv/libslapd.so.0
> #3  0x00007f68311e8eed in roles_cache_wait_on_change () from 
> /usr/lib64/dirsrv/plugins/libroles-plugin.so
> #4  0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #5  0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #6  0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 38 (Thread 0x7f681ab2b700 (LWP 4853)):
> #0  0x00007f683d0506d5 in pthread_cond_wait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f683d6a6050 in PR_WaitCondVar () from /lib64/libnspr4.so
> #2  0x00007f683f4eb198 in slapi_wait_condvar () from 
> /usr/lib64/dirsrv/libslapd.so.0
> #3  0x00007f68311e8eed in roles_cache_wait_on_change () from 
> /usr/lib64/dirsrv/plugins/libroles-plugin.so
> #4  0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #5  0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #6  0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 37 (Thread 0x7f681a32a700 (LWP 4854)):
> #0  0x00007f683d0506d5 in pthread_cond_wait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f683d6a6050 in PR_WaitCondVar () from /lib64/libnspr4.so
> #2  0x00007f683f4eb198 in slapi_wait_condvar () from 
> /usr/lib64/dirsrv/libslapd.so.0
> #3  0x00007f68311e8eed in roles_cache_wait_on_change () from 
> /usr/lib64/dirsrv/plugins/libroles-plugin.so
> #4  0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #5  0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #6  0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 36 (Thread 0x7f6819b29700 (LWP 4855)):
> #0  0x00007f683d050a82 in pthread_cond_timedwait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f683d6a5b07 in pt_TimedWait () from /lib64/libnspr4.so
> #2  0x00007f683d6a5fce in PR_WaitCondVar () from /lib64/libnspr4.so
> #3  0x00007f683f9a4d03 in housecleaning ()
> #4  0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #5  0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #6  0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 35 (Thread 0x7f6819328700 (LWP 4856)):
> #0  0x00007f683d050a82 in pthread_cond_timedwait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f683d6a5b07 in pt_TimedWait () from /lib64/libnspr4.so
> #2  0x00007f683d6a5fce in PR_WaitCondVar () from /lib64/libnspr4.so
> #3  0x00007f683f4911e8 in eq_loop () from /usr/lib64/dirsrv/libslapd.so.0
> #4  0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #5  0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #6  0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 34 (Thread 0x7f680bfff700 (LWP 4859)):
> #0  0x00007f683d0506d5 in pthread_cond_wait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f683d6a6050 in PR_WaitCondVar () from /lib64/libnspr4.so
> #2  0x00007f683f999fee in connection_wait_for_new_work ()
> #3  0x00007f683f99b719 in connection_threadmain ()
> #4  0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #5  0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #6  0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 33 (Thread 0x7f680b7fe700 (LWP 4860)):
> #0  0x00007f683d0506d5 in pthread_cond_wait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f683d6a6050 in PR_WaitCondVar () from /lib64/libnspr4.so
> #2  0x00007f683f999fee in connection_wait_for_new_work ()
> #3  0x00007f683f99b719 in connection_threadmain ()
> #4  0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #5  0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #6  0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 32 (Thread 0x7f680affd700 (LWP 4861)):
> #0  0x00007f683d0506d5 in pthread_cond_wait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f68375ac2f3 in __db_hybrid_mutex_suspend () from 
> /lib64/libdb-5.3.so <http://libdb-5.3.so>
> #2  0x00007f68375ab640 in __db_tas_mutex_lock () from 
> /lib64/libdb-5.3.so <http://libdb-5.3.so>
> #3  0x00007f6837655d3a in __lock_get_internal () from 
> /lib64/libdb-5.3.so <http://libdb-5.3.so>
> #4  0x00007f6837656820 in __lock_get () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #5  0x00007f6837682142 in __db_lget () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #6  0x00007f68375c9605 in __bam_search () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #7  0x00007f68375b4256 in __bamc_search () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #8  0x00007f68375b5d0f in __bamc_get () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #9  0x00007f683766eca6 in __dbc_iget () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #10 0x00007f683767db02 in __dbc_get_pp () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #11 0x00007f6832b59680 in idl_new_fetch () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #12 0x00007f6832b67b26 in index_read_ext_allids () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #13 0x00007f6832b52284 in keys2idl () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #14 0x00007f6832b529e3 in ava_candidates.isra.0 () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #15 0x00007f6832b52fd2 in filter_candidates_ext () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #16 0x00007f6832b54096 in list_candidates () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #17 0x00007f6832b52f40 in filter_candidates_ext () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #18 0x00007f6832b54096 in list_candidates () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #19 0x00007f6832b52f40 in filter_candidates_ext () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #20 0x00007f6832b54096 in list_candidates () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #21 0x00007f6832b52f40 in filter_candidates_ext () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #22 0x00007f6832b8e80c in subtree_candidates () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #23 0x00007f6832b8fe7f in ldbm_back_search () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #24 0x00007f683f4bd1d6 in op_shared_search () from 
> /usr/lib64/dirsrv/libslapd.so.0
> #25 0x00007f683f9ae33e in do_search ()
> #26 0x00007f683f99c3c3 in connection_threadmain ()
> #27 0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #28 0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #29 0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 31 (Thread 0x7f680a7fc700 (LWP 4862)):
> #0  0x00007f683d0506d5 in pthread_cond_wait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f683d6a62c3 in PR_EnterMonitor () from /lib64/libnspr4.so
> #2  0x00007f6832b4d3e6 in dblayer_txn_begin () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #3  0x00007f6832b89007 in ldbm_back_modify () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #4  0x00007f683f4b6541 in op_shared_modify () from 
> /usr/lib64/dirsrv/libslapd.so.0
> #5  0x00007f683f4b7004 in modify_internal_pb () from 
> /usr/lib64/dirsrv/libslapd.so.0
> #6  0x00007f683483bbbb in ipalockout_postop () from 
> /usr/lib64/dirsrv/plugins/libipa_lockout.so
> #7  0x00007f683f4c8848 in plugin_call_func () from 
> /usr/lib64/dirsrv/libslapd.so.0
> #8  0x00007f683f4c8b13 in plugin_call_plugins () from 
> /usr/lib64/dirsrv/libslapd.so.0
> #9  0x00007f683f9954d8 in do_bind ()
> #10 0x00007f683f99c3fd in connection_threadmain ()
> #11 0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #12 0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #13 0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 30 (Thread 0x7f6809ffb700 (LWP 4863)):
> #0  0x00007f683d0506d5 in pthread_cond_wait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f68375ac2f3 in __db_hybrid_mutex_suspend () from 
> /lib64/libdb-5.3.so <http://libdb-5.3.so>
> #2  0x00007f68375ab640 in __db_tas_mutex_lock () from 
> /lib64/libdb-5.3.so <http://libdb-5.3.so>
> #3  0x00007f6837655d3a in __lock_get_internal () from 
> /lib64/libdb-5.3.so <http://libdb-5.3.so>
> #4  0x00007f6837656820 in __lock_get () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #5  0x00007f6837682142 in __db_lget () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #6  0x00007f68375c9605 in __bam_search () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #7  0x00007f68375b4256 in __bamc_search () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #8  0x00007f68375b5d0f in __bamc_get () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #9  0x00007f683766eca6 in __dbc_iget () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #10 0x00007f683767db02 in __dbc_get_pp () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #11 0x00007f6832b59680 in idl_new_fetch () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #12 0x00007f6832b67b26 in index_read_ext_allids () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #13 0x00007f6832b52284 in keys2idl () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #14 0x00007f6832b529e3 in ava_candidates.isra.0 () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #15 0x00007f6832b52fd2 in filter_candidates_ext () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #16 0x00007f6832b54096 in list_candidates () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #17 0x00007f6832b52f40 in filter_candidates_ext () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #18 0x00007f6832b8e80c in subtree_candidates () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #19 0x00007f6832b8fe7f in ldbm_back_search () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #20 0x00007f683f4bd1d6 in op_shared_search () from 
> /usr/lib64/dirsrv/libslapd.so.0
> #21 0x00007f683f4cd94e in search_internal_callback_pb () from 
> /usr/lib64/dirsrv/libslapd.so.0
> #22 0x00007f683f4cdbe8 in search_internal_pb () from 
> /usr/lib64/dirsrv/libslapd.so.0
> #23 0x00007f683f9ac49b in ids_sasl_canon_user ()
> #24 0x00007f683d46c93b in _sasl_canon_user () from /lib64/libsasl2.so.3
> #25 0x00007f683d46cc4c in _sasl_canon_user_lookup () from 
> /lib64/libsasl2.so.3
> #26 0x00007f6837374fb9 in gssapi_server_mech_step () from 
> /usr/lib64/sasl2/libgssapiv2.so
> #27 0x00007f683d478b9b in sasl_server_step () from /lib64/libsasl2.so.3
> #28 0x00007f683f9ad83b in ids_sasl_check_bind ()
> #29 0x00007f683f99561a in do_bind ()
> #30 0x00007f683f99c3fd in connection_threadmain ()
> #31 0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #32 0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #33 0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 29 (Thread 0x7f68097fa700 (LWP 4864)):
> #0  0x00007f683d0506d5 in pthread_cond_wait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f683d6a6050 in PR_WaitCondVar () from /lib64/libnspr4.so
> #2  0x00007f683f999fee in connection_wait_for_new_work ()
> #3  0x00007f683f99b719 in connection_threadmain ()
> #4  0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #5  0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #6  0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 28 (Thread 0x7f6808ff9700 (LWP 4865)):
> #0  0x00007f683d0506d5 in pthread_cond_wait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f683d6a6050 in PR_WaitCondVar () from /lib64/libnspr4.so
> #2  0x00007f683f999fee in connection_wait_for_new_work ()
> #3  0x00007f683f99b719 in connection_threadmain ()
> #4  0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #5  0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #6  0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 27 (Thread 0x7f6803fff700 (LWP 4866)):
> #0  0x00007f683d0506d5 in pthread_cond_wait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f683d6a6050 in PR_WaitCondVar () from /lib64/libnspr4.so
> #2  0x00007f683f999fee in connection_wait_for_new_work ()
> #3  0x00007f683f99b719 in connection_threadmain ()
> #4  0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #5  0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #6  0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 26 (Thread 0x7f68037fe700 (LWP 4867)):
> #0  0x00007f683d0506d5 in pthread_cond_wait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f683d6a6050 in PR_WaitCondVar () from /lib64/libnspr4.so
> #2  0x00007f683f999fee in connection_wait_for_new_work ()
> #3  0x00007f683f99b719 in connection_threadmain ()
> #4  0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #5  0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #6  0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 25 (Thread 0x7f6802ffd700 (LWP 4868)):
> #0  0x00007f683d0506d5 in pthread_cond_wait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f683d6a6050 in PR_WaitCondVar () from /lib64/libnspr4.so
> #2  0x00007f683f999fee in connection_wait_for_new_work ()
> #3  0x00007f683f99b719 in connection_threadmain ()
> #4  0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #5  0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #6  0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 24 (Thread 0x7f68027fc700 (LWP 4869)):
> #0  0x00007f683d0506d5 in pthread_cond_wait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f68375ac2f3 in __db_hybrid_mutex_suspend () from 
> /lib64/libdb-5.3.so <http://libdb-5.3.so>
> #2  0x00007f68375abb37 in __db_tas_mutex_readlock () from 
> /lib64/libdb-5.3.so <http://libdb-5.3.so>
> #3  0x00007f68376c5d35 in __memp_fget () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #4  0x00007f683766f333 in __dbc_iget () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #5  0x00007f683767db02 in __dbc_get_pp () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #6  0x00007f6832b59822 in idl_new_fetch () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #7  0x00007f6832b67b26 in index_read_ext_allids () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #8  0x00007f6832b52284 in keys2idl () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #9  0x00007f6832b529e3 in ava_candidates.isra.0 () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #10 0x00007f6832b52fd2 in filter_candidates_ext () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #11 0x00007f6832b54096 in list_candidates () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #12 0x00007f6832b52f40 in filter_candidates_ext () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #13 0x00007f6832b54096 in list_candidates () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #14 0x00007f6832b52f40 in filter_candidates_ext () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #15 0x00007f6832b54096 in list_candidates () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #16 0x00007f6832b52f40 in filter_candidates_ext () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #17 0x00007f6832b8e80c in subtree_candidates () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #18 0x00007f6832b8fe7f in ldbm_back_search () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #19 0x00007f683f4bd1d6 in op_shared_search () from 
> /usr/lib64/dirsrv/libslapd.so.0
> #20 0x00007f683f9ae33e in do_search ()
> #21 0x00007f683f99c3c3 in connection_threadmain ()
> #22 0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #23 0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #24 0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 23 (Thread 0x7f6801ffb700 (LWP 4870)):
> #0  0x00007f683d0506d5 in pthread_cond_wait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f683d6a6050 in PR_WaitCondVar () from /lib64/libnspr4.so
> #2  0x00007f683f999fee in connection_wait_for_new_work ()
> #3  0x00007f683f99b719 in connection_threadmain ()
> #4  0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #5  0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #6  0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 22 (Thread 0x7f68017fa700 (LWP 4871)):
> #0  0x00007f683d0506d5 in pthread_cond_wait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f683d6a6050 in PR_WaitCondVar () from /lib64/libnspr4.so
> #2  0x00007f683f999fee in connection_wait_for_new_work ()
> #3  0x00007f683f99b719 in connection_threadmain ()
> #4  0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #5  0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #6  0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 21 (Thread 0x7f6800ff9700 (LWP 4872)):
> #0  0x00007f683d0506d5 in pthread_cond_wait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f683d6a6050 in PR_WaitCondVar () from /lib64/libnspr4.so
> #2  0x00007f683f999fee in connection_wait_for_new_work ()
> #3  0x00007f683f99b719 in connection_threadmain ()
> #4  0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #5  0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #6  0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 20 (Thread 0x7f68007f8700 (LWP 4873)):
> #0  0x00007f683d0506d5 in pthread_cond_wait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f68375ac2f3 in __db_hybrid_mutex_suspend () from 
> /lib64/libdb-5.3.so <http://libdb-5.3.so>
> #2  0x00007f68375ab640 in __db_tas_mutex_lock () from 
> /lib64/libdb-5.3.so <http://libdb-5.3.so>
> #3  0x00007f68376c5e1b in __memp_fget () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #4  0x00007f68375c9211 in __bam_search () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #5  0x00007f68375b4256 in __bamc_search () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #6  0x00007f68375b86c4 in __bamc_put () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #7  0x00007f683766f6d5 in __dbc_iput () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #8  0x00007f683766aa0e in __db_put () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #9  0x00007f683767ffa4 in __db_put_pp () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #10 0x00007f6832b5a4cf in idl_new_insert_key () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #11 0x00007f6832b695b5 in addordel_values_sv.isra.3 () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #12 0x00007f6832b6a25a in index_addordel_values_ext_sv () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #13 0x00007f6832b6a694 in index_addordel_values_sv () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #14 0x00007f6832b6a75a in index_addordel_entry () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #15 0x00007f6832b6d5fa in ldbm_back_add () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #16 0x00007f683f46fcca in op_shared_add () from 
> /usr/lib64/dirsrv/libslapd.so.0
> #17 0x00007f683f471020 in do_add () from /usr/lib64/dirsrv/libslapd.so.0
> #18 0x00007f683f99c303 in connection_threadmain ()
> #19 0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #20 0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #21 0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 19 (Thread 0x7f67ffff7700 (LWP 4874)):
> #0  0x00007f683d0506d5 in pthread_cond_wait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f683d6a62c3 in PR_EnterMonitor () from /lib64/libnspr4.so
> #2  0x00007f6832b4d3e6 in dblayer_txn_begin () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #3  0x00007f6832b89007 in ldbm_back_modify () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #4  0x00007f683f4b6541 in op_shared_modify () from 
> /usr/lib64/dirsrv/libslapd.so.0
> #5  0x00007f683f4b7004 in modify_internal_pb () from 
> /usr/lib64/dirsrv/libslapd.so.0
> #6  0x00007f6832dd3b60 in ipapwd_apply_mods () from 
> /usr/lib64/dirsrv/plugins/libipa_pwd_extop.so
> #7  0x00007f6832dd78e0 in store_new_keys () from 
> /usr/lib64/dirsrv/plugins/libipa_pwd_extop.so
> #8  0x00007f6832dd9ad0 in ipapwd_extop () from 
> /usr/lib64/dirsrv/plugins/libipa_pwd_extop.so
> #9  0x00007f683f4c6ba2 in plugin_call_exop_plugins () from 
> /usr/lib64/dirsrv/libslapd.so.0
> #10 0x00007f683f9a2efe in do_extended ()
> #11 0x00007f683f99c41a in connection_threadmain ()
> #12 0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #13 0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #14 0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 18 (Thread 0x7f67ff7f6700 (LWP 4875)):
> #0  0x00007f683d0506d5 in pthread_cond_wait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f683d6a6050 in PR_WaitCondVar () from /lib64/libnspr4.so
> #2  0x00007f683f999fee in connection_wait_for_new_work ()
> #3  0x00007f683f99b719 in connection_threadmain ()
> #4  0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #5  0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #6  0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 17 (Thread 0x7f67feff5700 (LWP 4876)):
> #0  0x00007f683d0506d5 in pthread_cond_wait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f68375ac2f3 in __db_hybrid_mutex_suspend () from 
> /lib64/libdb-5.3.so <http://libdb-5.3.so>
> #2  0x00007f68375ab640 in __db_tas_mutex_lock () from 
> /lib64/libdb-5.3.so <http://libdb-5.3.so>
> #3  0x00007f6837655d3a in __lock_get_internal () from 
> /lib64/libdb-5.3.so <http://libdb-5.3.so>
> #4  0x00007f6837656820 in __lock_get () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #5  0x00007f6837682142 in __db_lget () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #6  0x00007f68375c9605 in __bam_search () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #7  0x00007f68375b4256 in __bamc_search () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #8  0x00007f68375b5d0f in __bamc_get () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #9  0x00007f683766eca6 in __dbc_iget () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #10 0x00007f683767db02 in __dbc_get_pp () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #11 0x00007f6832b59680 in idl_new_fetch () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #12 0x00007f6832b67b26 in index_read_ext_allids () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #13 0x00007f6832b52284 in keys2idl () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #14 0x00007f6832b529e3 in ava_candidates.isra.0 () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #15 0x00007f6832b52fd2 in filter_candidates_ext () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #16 0x00007f6832b54096 in list_candidates () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #17 0x00007f6832b52f40 in filter_candidates_ext () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #18 0x00007f6832b8e80c in subtree_candidates () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #19 0x00007f6832b8fe7f in ldbm_back_search () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #20 0x00007f683f4bd1d6 in op_shared_search () from 
> /usr/lib64/dirsrv/libslapd.so.0
> #21 0x00007f683f4cd94e in search_internal_callback_pb () from 
> /usr/lib64/dirsrv/libslapd.so.0
> #22 0x00007f683f4cdbe8 in search_internal_pb () from 
> /usr/lib64/dirsrv/libslapd.so.0
> #23 0x00007f6832dd75dc in get_entry_by_principal () from 
> /usr/lib64/dirsrv/plugins/libipa_pwd_extop.so
> #24 0x00007f6832dd8eb1 in ipapwd_extop () from 
> /usr/lib64/dirsrv/plugins/libipa_pwd_extop.so
> #25 0x00007f683f4c6ba2 in plugin_call_exop_plugins () from 
> /usr/lib64/dirsrv/libslapd.so.0
> #26 0x00007f683f9a2efe in do_extended ()
> #27 0x00007f683f99c41a in connection_threadmain ()
> #28 0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #29 0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #30 0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 16 (Thread 0x7f67fe7f4700 (LWP 4877)):
> #0  0x00007f683d0506d5 in pthread_cond_wait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f683d6a6050 in PR_WaitCondVar () from /lib64/libnspr4.so
> #2  0x00007f683f999fee in connection_wait_for_new_work ()
> #3  0x00007f683f99b719 in connection_threadmain ()
> #4  0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #5  0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #6  0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 15 (Thread 0x7f67fdff3700 (LWP 4878)):
> #0  0x00007f683d0506d5 in pthread_cond_wait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f683d6a6050 in PR_WaitCondVar () from /lib64/libnspr4.so
> #2  0x00007f683f999fee in connection_wait_for_new_work ()
> #3  0x00007f683f99b719 in connection_threadmain ()
> #4  0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #5  0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #6  0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 14 (Thread 0x7f67fd7f2700 (LWP 4879)):
> #0  0x00007f683d0506d5 in pthread_cond_wait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f683d6a6050 in PR_WaitCondVar () from /lib64/libnspr4.so
> #2  0x00007f683f999fee in connection_wait_for_new_work ()
> #3  0x00007f683f99b719 in connection_threadmain ()
> #4  0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #5  0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #6  0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 13 (Thread 0x7f67fcff1700 (LWP 4880)):
> #0  0x00007f683d0506d5 in pthread_cond_wait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f683d6a6050 in PR_WaitCondVar () from /lib64/libnspr4.so
> #2  0x00007f683f999fee in connection_wait_for_new_work ()
> #3  0x00007f683f99b719 in connection_threadmain ()
> #4  0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #5  0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #6  0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 12 (Thread 0x7f67fc7f0700 (LWP 4881)):
> #0  0x00007f683d0506d5 in pthread_cond_wait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f683d6a6050 in PR_WaitCondVar () from /lib64/libnspr4.so
> #2  0x00007f683f999fee in connection_wait_for_new_work ()
> #3  0x00007f683f99b719 in connection_threadmain ()
> #4  0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #5  0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #6  0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 11 (Thread 0x7f67fbfef700 (LWP 4882)):
> #0  0x00007f683d0506d5 in pthread_cond_wait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f683d6a6050 in PR_WaitCondVar () from /lib64/libnspr4.so
> #2  0x00007f683f999fee in connection_wait_for_new_work ()
> #3  0x00007f683f99b719 in connection_threadmain ()
> #4  0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #5  0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #6  0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 10 (Thread 0x7f67fb7ee700 (LWP 4883)):
> #0  0x00007f683d0506d5 in pthread_cond_wait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f68375ac2f3 in __db_hybrid_mutex_suspend () from 
> /lib64/libdb-5.3.so <http://libdb-5.3.so>
> #2  0x00007f68375ab640 in __db_tas_mutex_lock () from 
> /lib64/libdb-5.3.so <http://libdb-5.3.so>
> #3  0x00007f6837655d3a in __lock_get_internal () from 
> /lib64/libdb-5.3.so <http://libdb-5.3.so>
> #4  0x00007f6837656820 in __lock_get () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #5  0x00007f6837682142 in __db_lget () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #6  0x00007f68375c9605 in __bam_search () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #7  0x00007f68375b4256 in __bamc_search () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #8  0x00007f68375b5d0f in __bamc_get () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #9  0x00007f683766eca6 in __dbc_iget () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #10 0x00007f683767db02 in __dbc_get_pp () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #11 0x00007f6832b59680 in idl_new_fetch () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #12 0x00007f6832b67b26 in index_read_ext_allids () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #13 0x00007f6832b52284 in keys2idl () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #14 0x00007f6832b529e3 in ava_candidates.isra.0 () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #15 0x00007f6832b52fd2 in filter_candidates_ext () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #16 0x00007f6832b54096 in list_candidates () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #17 0x00007f6832b52f40 in filter_candidates_ext () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #18 0x00007f6832b54096 in list_candidates () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #19 0x00007f6832b52f40 in filter_candidates_ext () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #20 0x00007f6832b54096 in list_candidates () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #21 0x00007f6832b52f40 in filter_candidates_ext () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #22 0x00007f6832b8e80c in subtree_candidates () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #23 0x00007f6832b8fe7f in ldbm_back_search () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #24 0x00007f683f4bd1d6 in op_shared_search () from 
> /usr/lib64/dirsrv/libslapd.so.0
> #25 0x00007f683f9ae33e in do_search ()
> #26 0x00007f683f99c3c3 in connection_threadmain ()
> #27 0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #28 0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #29 0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 9 (Thread 0x7f67fafed700 (LWP 4884)):
> #0  0x00007f683d0506d5 in pthread_cond_wait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f683d6a6050 in PR_WaitCondVar () from /lib64/libnspr4.so
> #2  0x00007f683f999fee in connection_wait_for_new_work ()
> #3  0x00007f683f99b719 in connection_threadmain ()
> #4  0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #5  0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #6  0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 8 (Thread 0x7f67fa7ec700 (LWP 4885)):
> #0  0x00007f683d0506d5 in pthread_cond_wait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f68375ac2f3 in __db_hybrid_mutex_suspend () from 
> /lib64/libdb-5.3.so <http://libdb-5.3.so>
> #2  0x00007f68375ab640 in __db_tas_mutex_lock () from 
> /lib64/libdb-5.3.so <http://libdb-5.3.so>
> #3  0x00007f6837655d3a in __lock_get_internal () from 
> /lib64/libdb-5.3.so <http://libdb-5.3.so>
> #4  0x00007f6837656820 in __lock_get () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #5  0x00007f6837682142 in __db_lget () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #6  0x00007f68375c9605 in __bam_search () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #7  0x00007f68375b4256 in __bamc_search () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #8  0x00007f68375b5d0f in __bamc_get () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #9  0x00007f683766eca6 in __dbc_iget () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #10 0x00007f683767db02 in __dbc_get_pp () from /lib64/libdb-5.3.so 
> <http://libdb-5.3.so>
> #11 0x00007f6832b59680 in idl_new_fetch () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #12 0x00007f6832b67b26 in index_read_ext_allids () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #13 0x00007f6832b52284 in keys2idl () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #14 0x00007f6832b529e3 in ava_candidates.isra.0 () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #15 0x00007f6832b52fd2 in filter_candidates_ext () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #16 0x00007f6832b54096 in list_candidates () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #17 0x00007f6832b52f40 in filter_candidates_ext () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #18 0x00007f6832b54096 in list_candidates () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #19 0x00007f6832b52f40 in filter_candidates_ext () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #20 0x00007f6832b54096 in list_candidates () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #21 0x00007f6832b52f40 in filter_candidates_ext () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #22 0x00007f6832b8e80c in subtree_candidates () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #23 0x00007f6832b8fe7f in ldbm_back_search () from 
> /usr/lib64/dirsrv/plugins/libback-ldbm.so
> #24 0x00007f683f4bd1d6 in op_shared_search () from 
> /usr/lib64/dirsrv/libslapd.so.0
> #25 0x00007f683f9ae33e in do_search ()
> #26 0x00007f683f99c3c3 in connection_threadmain ()
> #27 0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #28 0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #29 0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 7 (Thread 0x7f67f9feb700 (LWP 4886)):
> #0  0x00007f683d0506d5 in pthread_cond_wait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f683d6a6050 in PR_WaitCondVar () from /lib64/libnspr4.so
> #2  0x00007f683f999fee in connection_wait_for_new_work ()
> #3  0x00007f683f99b719 in connection_threadmain ()
> #4  0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #5  0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #6  0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 6 (Thread 0x7f67f97ea700 (LWP 4887)):
> #0  0x00007f683d0506d5 in pthread_cond_wait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f683d6a6050 in PR_WaitCondVar () from /lib64/libnspr4.so
> #2  0x00007f683f999fee in connection_wait_for_new_work ()
> #3  0x00007f683f99b719 in connection_threadmain ()
> #4  0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #5  0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #6  0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 5 (Thread 0x7f67f8fe9700 (LWP 4888)):
> #0  0x00007f683d0506d5 in pthread_cond_wait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f683d6a6050 in PR_WaitCondVar () from /lib64/libnspr4.so
> #2  0x00007f683f999fee in connection_wait_for_new_work ()
> #3  0x00007f683f99b719 in connection_threadmain ()
> #4  0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #5  0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #6  0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 4 (Thread 0x7f67f87e8700 (LWP 4889)):
> #0  0x00007f683cd719b3 in select () from /lib64/libc.so.6
> #1  0x00007f683f4fc0e9 in DS_Sleep () from /usr/lib64/dirsrv/libslapd.so.0
> #2  0x00007f683f99d325 in time_thread ()
> #3  0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #4  0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #5  0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 3 (Thread 0x7f67f7de6700 (LWP 4892)):
> #0  0x00007f683d0506d5 in pthread_cond_wait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f683d6a6050 in PR_WaitCondVar () from /lib64/libnspr4.so
> #2  0x00007f683f9a8f25 in ps_send_results ()
> #3  0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #4  0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #5  0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 2 (Thread 0x7f67f75e5700 (LWP 5084)):
> #0  0x00007f683d0506d5 in pthread_cond_wait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f683d6a6050 in PR_WaitCondVar () from /lib64/libnspr4.so
> #2  0x00007f683f9a8f25 in ps_send_results ()
> #3  0x00007f683d6ab7bb in _pt_root () from /lib64/libnspr4.so
> #4  0x00007f683d04cdc5 in start_thread () from /lib64/libpthread.so.0
> #5  0x00007f683cd7a28d in clone () from /lib64/libc.so.6
> Thread 1 (Thread 0x7f683f964840 (LWP 4845)):
> #0  0x00007f683d0506d5 in pthread_cond_wait@@GLIBC_2.3.2 () from 
> /lib64/libpthread.so.0
> #1  0x00007f683d6a62c3 in PR_EnterMonitor () from /lib64/libnspr4.so
> #2  0x00007f683f99d5ed in setup_pr_read_pds ()
> #3  0x00007f683f9a0fd9 in slapd_daemon ()
> #4  0x00007f683f992c6c in main ()
>
>
>
> the top output seems ok, there was just a sudden spike to around 340% 
> cpu then it comes down
>
> top - 08:53:12 up 6 days, 23:20,  1 user,  load average: 0.00, 0.01, 0.12
> Threads:  44 total,   0 running,  44 sleeping,   0 stopped,   0 zombie
> %Cpu(s):  0.0 us,  0.0 sy,  0.0 ni,100.0 id,  0.0 wa,  0.0 hi,  0.0 
> si,  0.0 st
> KiB Mem : 65533176 total, 52165676 free,  6135088 used, 7232412 buff/cache
> KiB Swap:  3999996 total,  3999996 free,        0 used. 58452040 avail Mem
>
>    PID USER      PR  NI    VIRT    RES    SHR S %CPU %MEM     TIME+ 
> COMMAND
>   4845 dirsrv    20   0 5133196 3.150g 281272 S  0.0  5.0 31:34.51 
> ns-slapd
>   4847 dirsrv    20   0 5133196 3.150g 281272 S  0.0  5.0 0:13.53 ns-slapd
>   4848 dirsrv    20   0 5133196 3.150g 281272 S  0.0  5.0 0:13.16 ns-slapd
>   4849 dirsrv    20   0 5133196 3.150g 281272 S  0.0  5.0 0:45.27 ns-slapd
>   4850 dirsrv    20   0 5133196 3.150g 281272 S  0.0  5.0 0:01.60 ns-slapd
>   4851 dirsrv    20   0 5133196 3.150g 281272 S  0.0  5.0 0:00.00 ns-slapd
>   4852 dirsrv    20   0 5133196 3.150g 281272 S  0.0  5.0 0:00.00 ns-slapd
>   4853 dirsrv    20   0 5133196 3.150g 281272 S  0.0  5.0 0:00.00 ns-slapd
>   4854 dirsrv    20   0 5133196 3.150g 281272 S  0.0  5.0 0:00.00 ns-slapd
>   4855 dirsrv    20   0 5133196 3.150g 281272 S  0.0  5.0 0:03.02 ns-slapd
>   4856 dirsrv    20   0 5133196 3.150g 281272 S  0.0  5.0 0:00.26 ns-slapd
>   4859 dirsrv    20   0 5133196 3.150g 281272 S  0.0  5.0 3:18.67 ns-slapd
>   4860 dirsrv    20   0 5133196 3.150g 281272 S  0.0  5.0 3:19.82 ns-slapd
>   4861 dirsrv    20   0 5133196 3.150g 281272 S  0.0  5.0 3:20.23 ns-slapd
>   4862 dirsrv    20   0 5133196 3.150g 281272 S  0.0  5.0 3:22.65 ns-slapd
>   4863 dirsrv    20   0 5133196 3.150g 281272 S  0.0  5.0 3:16.64 ns-slapd
>   4864 dirsrv    20   0 5133196 3.150g 281272 S  0.0  5.0 3:17.39 ns-slapd
>   4865 dirsrv    20   0 5133196 3.150g 281272 S  0.0  5.0 3:17.80 ns-slapd
>
>
> Thanks
> Rakesh
>
> On Tue, Sep 6, 2016 at 12:09 AM, Rakesh Rajasekharan 
> <rakesh.rajasekharan at gmail.com <mailto:rakesh.rajasekharan at gmail.com>> 
> wrote:
>
>     Hi Thierry/Ludwig,
>
>     Unfortunately I had by then restarted the service and since then
>     have been trying to hit the hang issue again but no luck this time
>
>     It has been running fine for the last few hours now in-spite of
>     trying all that I believe could cause the hang like making
>     simultaneous client addition requests.
>
>     I will continue testing this and next time I get it I will make
>     sure I get the pstack and also get the dump of db lock info.
>
>     Thanks,
>     Rakesh
>
>
>
>     On Mon, Sep 5, 2016 at 6:14 PM, Ludwig Krispenz
>     <lkrispen at redhat.com <mailto:lkrispen at redhat.com>> wrote:
>
>
>         On 09/05/2016 02:31 PM, thierry bordaz wrote:
>>         Hi Rakesh,
>>
>>         Thanks you soooo much for you continuous help on this !!
>>
>>         If the hang is still going on, would you dump the DB lock
>>         information with:
>>
>>             db_stat -CA -N -h /var/lib/dirsrv/slapd-<instance>/db
>>             >/tmp/db_lock_info
>>
>>         It is looking like several threads are waiting for
>>         one/several db locks. With the lock info we will know which
>>         thread acquired it/them.
>>         A guess is that it could be the checkpointing thread but this
>>         one is also waiting (on a memory pool).
>>
>>         I am copying Ludwig on this thread in case this pstack rings
>>         any bell.
>         the frequent presence of __db_tas_mutex_lock() looks like the
>         NUMA problem of libdb, although the threads already have
>         stopped spinning (maybe this was an effect of gcore).
>         If the hang aoccurs again, could you check cpu consumption
>         top -H -p <slapd-pid>
>         and get a pstack
>         pstack <slapd-pid>
>>
>>         best regards
>>         thierry
>>
>>         On 09/05/2016 02:05 PM, Rakesh Rajasekharan wrote:
>>>         Hi Thierry,
>>>
>>>         I was able to now reporduce the issue..
>>>
>>>         the ns-slapd process just got hung,.. however, no core file
>>>         was generate..
>>>
>>>         I manually created a coredump using gcore and then took a
>>>         strace of it
>>>         this is  strace from the coredump generated
>>>
>>>         GNU gdb (GDB) Red Hat Enterprise Linux 7.6.1-80.el7
>>>         Copyright (C) 2013 Free Software Foundation, Inc.
>>>         License GPLv3+: GNU GPL version 3 or later
>>>         <http://gnu.org/licenses/gpl.html
>>>         <http://gnu.org/licenses/gpl.html>>
>>>         This is free software: you are free to change and
>>>         redistribute it.
>>>         There is NO WARRANTY, to the extent permitted by law.  Type
>>>         "show copying"
>>>         and "show warranty" for details.
>>>         This GDB was configured as "x86_64-redhat-linux-gnu".
>>>         For bug reporting instructions, please see:
>>>         <http://www.gnu.org/software/gdb/bugs/
>>>         <http://www.gnu.org/software/gdb/bugs/>>...
>>>         Reading symbols from /usr/sbin/ns-slapd...Reading symbols
>>>         from /usr/sbin/ns-slapd...(no debugging symbols found)...done.
>>>         (no debugging symbols found)...done.
>>>         [New LWP 105159]
>>>         [New LWP 105160]
>>>         [New LWP 105161]
>>>         [New LWP 105162]
>>>         [New LWP 105163]
>>>         [New LWP 105164]
>>>         [New LWP 105165]
>>>         [New LWP 105166]
>>>         [New LWP 105167]
>>>         [New LWP 105168]
>>>         [New LWP 105171]
>>>         [New LWP 105172]
>>>         [New LWP 105173]
>>>         [New LWP 105174]
>>>         [New LWP 105175]
>>>         [New LWP 105176]
>>>         [New LWP 105177]
>>>         [New LWP 105178]
>>>         [New LWP 105179]
>>>         [New LWP 105180]
>>>         [New LWP 105181]
>>>         [New LWP 105182]
>>>         [New LWP 105183]
>>>         [New LWP 105184]
>>>         [New LWP 105185]
>>>         [New LWP 105186]
>>>         [New LWP 105187]
>>>         [New LWP 105188]
>>>         [New LWP 105189]
>>>         [New LWP 105190]
>>>         [New LWP 105191]
>>>         [New LWP 105192]
>>>         [New LWP 105193]
>>>         [New LWP 105194]
>>>         [New LWP 105195]
>>>         [New LWP 105196]
>>>         [New LWP 105197]
>>>         [New LWP 105198]
>>>         [New LWP 105199]
>>>         [New LWP 105200]
>>>         [New LWP 105201]
>>>         [New LWP 105203]
>>>         [New LWP 105215]
>>>         [New LWP 105158]
>>>         [Thread debugging using libthread_db enabled]
>>>         Using host libthread_db library "/lib64/libthread_db.so.1".
>>>         Core was generated by `/usr/sbin/ns-slapd'.
>>>         #0  0x00007f1b48ae69b3 in select () from /lib64/libc.so.6
>>>
>>>         Thread 44 (Thread 0x7f1b4b6d9840 (LWP 105158)):
>>>         #0  0x00007f1b48dc56d5 in pthread_cond_wait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_wait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b4941b2c3 in PR_EnterMonitor () from
>>>         /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #2  0x00007f1b4b7125ed in setup_pr_read_pds ()
>>>         No symbol table info available.
>>>         #3  0x00007f1b4b715fd9 in slapd_daemon ()
>>>         No symbol table info available.
>>>         #4  0x00007f1b4b707c6c in main ()
>>>         No symbol table info available.
>>>
>>>         Thread 43 (Thread 0x7f1a5df0f700 (LWP 105215)):
>>>         #0  0x00007f1b48dc56d5 in pthread_cond_wait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_wait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b4941b050 in PR_WaitCondVar () from
>>>         /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #2  0x00007f1b4b71df25 in ps_send_results ()
>>>         No symbol table info available.
>>>         #3  0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #4  0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #5  0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 42 (Thread 0x7f1b03fe7700 (LWP 105203)):
>>>         #0  0x00007f1b48dc56d5 in pthread_cond_wait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_wait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b4941b050 in PR_WaitCondVar () from
>>>         /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #2  0x00007f1b4b71df25 in ps_send_results ()
>>>         No symbol table info available.
>>>         #3  0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #4  0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #5  0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 41 (Thread 0x7f1b047e8700 (LWP 105201)):
>>>         #0  0x00007f1b48ae69b3 in select () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>         #1  0x00007f1b4b2710e9 in DS_Sleep () from
>>>         /usr/lib64/dirsrv/libslapd.so.0
>>>         No symbol table info available.
>>>         #2  0x00007f1b4b712325 in time_thread ()
>>>         No symbol table info available.
>>>         #3  0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #4  0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #5  0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 40 (Thread 0x7f1b04fe9700 (LWP 105200)):
>>>         #0  0x00007f1b48dc56d5 in pthread_cond_wait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_wait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b433212f3 in __db_hybrid_mutex_suspend () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #2  0x00007f1b43320640 in __db_tas_mutex_lock () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #3  0x00007f1b4343ae1b in __memp_fget () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #4  0x00007f1b4333e211 in __bam_search () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #5  0x00007f1b43329256 in __bamc_search () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #6  0x00007f1b4332d6c4 in __bamc_put () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #7  0x00007f1b433e46d5 in __dbc_iput () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #8  0x00007f1b433dfa0e in __db_put () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #9  0x00007f1b433f4fa4 in __db_put_pp () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #10 0x00007f1b3e8cf4cf in idl_new_insert_key () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #11 0x00007f1b3e8de5b5 in addordel_values_sv.isra.3 () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #12 0x00007f1b3e8df25a in index_addordel_values_ext_sv ()
>>>         from /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #13 0x00007f1b3e8df694 in index_addordel_values_sv () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #14 0x00007f1b3e8df75a in index_addordel_entry () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #15 0x00007f1b3e8e25fa in ldbm_back_add () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #16 0x00007f1b4b1e4cca in op_shared_add () from
>>>         /usr/lib64/dirsrv/libslapd.so.0
>>>         No symbol table info available.
>>>         #17 0x00007f1b4b1e6020 in do_add () from
>>>         /usr/lib64/dirsrv/libslapd.so.0
>>>         No symbol table info available.
>>>         #18 0x00007f1b4b711303 in connection_threadmain ()
>>>         No symbol table info available.
>>>         #19 0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #20 0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #21 0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 39 (Thread 0x7f1b057ea700 (LWP 105199)):
>>>         #0  0x00007f1b48dc56d5 in pthread_cond_wait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_wait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b4941b050 in PR_WaitCondVar () from
>>>         /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #2  0x00007f1b4b70efee in connection_wait_for_new_work ()
>>>         No symbol table info available.
>>>         #3  0x00007f1b4b710719 in connection_threadmain ()
>>>         No symbol table info available.
>>>         #4  0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #5  0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #6  0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 38 (Thread 0x7f1b05feb700 (LWP 105198)):
>>>         #0  0x00007f1b48dc56d5 in pthread_cond_wait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_wait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b4941b050 in PR_WaitCondVar () from
>>>         /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #2  0x00007f1b4b70efee in connection_wait_for_new_work ()
>>>         No symbol table info available.
>>>         #3  0x00007f1b4b710719 in connection_threadmain ()
>>>         No symbol table info available.
>>>         #4  0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #5  0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #6  0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 37 (Thread 0x7f1b067ec700 (LWP 105197)):
>>>         #0  0x00007f1b48dc56d5 in pthread_cond_wait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_wait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b4941b050 in PR_WaitCondVar () from
>>>         /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #2  0x00007f1b4b70efee in connection_wait_for_new_work ()
>>>         No symbol table info available.
>>>         #3  0x00007f1b4b710719 in connection_threadmain ()
>>>         No symbol table info available.
>>>         #4  0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #5  0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #6  0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 36 (Thread 0x7f1b06fed700 (LWP 105196)):
>>>         #0  0x00007f1b48dc56d5 in pthread_cond_wait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_wait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b4941b050 in PR_WaitCondVar () from
>>>         /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #2  0x00007f1b4b70efee in connection_wait_for_new_work ()
>>>         No symbol table info available.
>>>         #3  0x00007f1b4b710719 in connection_threadmain ()
>>>         No symbol table info available.
>>>         #4  0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #5  0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #6  0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 35 (Thread 0x7f1b077ee700 (LWP 105195)):
>>>         #0  0x00007f1b48dc56d5 in pthread_cond_wait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_wait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b4941b2c3 in PR_EnterMonitor () from
>>>         /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #2  0x00007f1b3e8c23e6 in dblayer_txn_begin () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #3  0x00007f1b3e8fe007 in ldbm_back_modify () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #4  0x00007f1b4b22b541 in op_shared_modify () from
>>>         /usr/lib64/dirsrv/libslapd.so.0
>>>         No symbol table info available.
>>>         #5  0x00007f1b4b22c004 in modify_internal_pb () from
>>>         /usr/lib64/dirsrv/libslapd.so.0
>>>         No symbol table info available.
>>>         #6  0x00007f1b3eb48b60 in ipapwd_apply_mods () from
>>>         /usr/lib64/dirsrv/plugins/libipa_pwd_extop.so
>>>         No symbol table info available.
>>>         #7  0x00007f1b3eb4c8e0 in store_new_keys () from
>>>         /usr/lib64/dirsrv/plugins/libipa_pwd_extop.so
>>>         No symbol table info available.
>>>         #8  0x00007f1b3eb4ead0 in ipapwd_extop () from
>>>         /usr/lib64/dirsrv/plugins/libipa_pwd_extop.so
>>>         No symbol table info available.
>>>         #9  0x00007f1b4b23bba2 in plugin_call_exop_plugins () from
>>>         /usr/lib64/dirsrv/libslapd.so.0
>>>         No symbol table info available.
>>>         #10 0x00007f1b4b717efe in do_extended ()
>>>         No symbol table info available.
>>>         #11 0x00007f1b4b71141a in connection_threadmain ()
>>>         No symbol table info available.
>>>         #12 0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #13 0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #14 0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 34 (Thread 0x7f1b07fef700 (LWP 105194)):
>>>         #0  0x00007f1b48dc56d5 in pthread_cond_wait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_wait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b4941b050 in PR_WaitCondVar () from
>>>         /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #2  0x00007f1b4b70efee in connection_wait_for_new_work ()
>>>         No symbol table info available.
>>>         #3  0x00007f1b4b710719 in connection_threadmain ()
>>>         No symbol table info available.
>>>         #4  0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #5  0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #6  0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 33 (Thread 0x7f1b087f0700 (LWP 105193)):
>>>         #0  0x00007f1b48dc56d5 in pthread_cond_wait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_wait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b4941b050 in PR_WaitCondVar () from
>>>         /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #2  0x00007f1b4b70efee in connection_wait_for_new_work ()
>>>         No symbol table info available.
>>>         #3  0x00007f1b4b710719 in connection_threadmain ()
>>>         No symbol table info available.
>>>         #4  0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #5  0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #6  0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 32 (Thread 0x7f1b08ff1700 (LWP 105192)):
>>>         #0  0x00007f1b48dc56d5 in pthread_cond_wait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_wait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b4941b050 in PR_WaitCondVar () from
>>>         /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #2  0x00007f1b4b70efee in connection_wait_for_new_work ()
>>>         No symbol table info available.
>>>         #3  0x00007f1b4b710719 in connection_threadmain ()
>>>         No symbol table info available.
>>>         #4  0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #5  0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #6  0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 31 (Thread 0x7f1b097f2700 (LWP 105191)):
>>>         #0  0x00007f1b48dc56d5 in pthread_cond_wait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_wait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b4941b050 in PR_WaitCondVar () from
>>>         /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #2  0x00007f1b4b70efee in connection_wait_for_new_work ()
>>>         No symbol table info available.
>>>         #3  0x00007f1b4b710719 in connection_threadmain ()
>>>         No symbol table info available.
>>>         #4  0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #5  0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #6  0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 30 (Thread 0x7f1b09ff3700 (LWP 105190)):
>>>         #0  0x00007f1b48dc56d5 in pthread_cond_wait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_wait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b433212f3 in __db_hybrid_mutex_suspend () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #2  0x00007f1b43320640 in __db_tas_mutex_lock () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #3  0x00007f1b433cad3a in __lock_get_internal () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #4  0x00007f1b433cb820 in __lock_get () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #5  0x00007f1b433f7142 in __db_lget () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #6  0x00007f1b4333e605 in __bam_search () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #7  0x00007f1b43329256 in __bamc_search () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #8  0x00007f1b4332ad0f in __bamc_get () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #9  0x00007f1b433e3ca6 in __dbc_iget () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #10 0x00007f1b433f2b02 in __dbc_get_pp () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #11 0x00007f1b3e8ce680 in idl_new_fetch () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #12 0x00007f1b3e8dcb26 in index_read_ext_allids () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #13 0x00007f1b3e8c7284 in keys2idl () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #14 0x00007f1b3e8c79e3 in ava_candidates.isra.0 () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #15 0x00007f1b3e8c7fd2 in filter_candidates_ext () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #16 0x00007f1b3e8c9096 in list_candidates () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #17 0x00007f1b3e8c7f40 in filter_candidates_ext () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #18 0x00007f1b3e8c9096 in list_candidates () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #19 0x00007f1b3e8c7f40 in filter_candidates_ext () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #20 0x00007f1b3e8c9096 in list_candidates () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #21 0x00007f1b3e8c7f40 in filter_candidates_ext () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #22 0x00007f1b3e90380c in subtree_candidates () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #23 0x00007f1b3e904e7f in ldbm_back_search () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #24 0x00007f1b4b2321d6 in op_shared_search () from
>>>         /usr/lib64/dirsrv/libslapd.so.0
>>>         No symbol table info available.
>>>         #25 0x00007f1b4b72333e in do_search ()
>>>         No symbol table info available.
>>>         #26 0x00007f1b4b7113c3 in connection_threadmain ()
>>>         No symbol table info available.
>>>         #27 0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #28 0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #29 0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 29 (Thread 0x7f1b0a7f4700 (LWP 105189)):
>>>         #0  0x00007f1b48dc56d5 in pthread_cond_wait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_wait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b4941b050 in PR_WaitCondVar () from
>>>         /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #2  0x00007f1b4b70efee in connection_wait_for_new_work ()
>>>         No symbol table info available.
>>>         #3  0x00007f1b4b710719 in connection_threadmain ()
>>>         No symbol table info available.
>>>         #4  0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #5  0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #6  0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 28 (Thread 0x7f1b0aff5700 (LWP 105188)):
>>>         #0  0x00007f1b48dc56d5 in pthread_cond_wait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_wait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b4941b050 in PR_WaitCondVar () from
>>>         /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #2  0x00007f1b4b70efee in connection_wait_for_new_work ()
>>>         No symbol table info available.
>>>         #3  0x00007f1b4b710719 in connection_threadmain ()
>>>         No symbol table info available.
>>>         #4  0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #5  0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #6  0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 27 (Thread 0x7f1b0b7f6700 (LWP 105187)):
>>>         #0  0x00007f1b48dc56d5 in pthread_cond_wait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_wait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b4941b050 in PR_WaitCondVar () from
>>>         /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #2  0x00007f1b4b70efee in connection_wait_for_new_work ()
>>>         No symbol table info available.
>>>         #3  0x00007f1b4b710719 in connection_threadmain ()
>>>         No symbol table info available.
>>>         #4  0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #5  0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #6  0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 26 (Thread 0x7f1b0bff7700 (LWP 105186)):
>>>         #0  0x00007f1b48dc56d5 in pthread_cond_wait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_wait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b433212f3 in __db_hybrid_mutex_suspend () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #2  0x00007f1b43320640 in __db_tas_mutex_lock () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #3  0x00007f1b433cad3a in __lock_get_internal () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #4  0x00007f1b433cb820 in __lock_get () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #5  0x00007f1b433f7142 in __db_lget () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #6  0x00007f1b4333e605 in __bam_search () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #7  0x00007f1b43329256 in __bamc_search () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #8  0x00007f1b4332ad0f in __bamc_get () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #9  0x00007f1b433e3ca6 in __dbc_iget () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #10 0x00007f1b433f2b02 in __dbc_get_pp () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #11 0x00007f1b3e8ce680 in idl_new_fetch () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #12 0x00007f1b3e8dcb26 in index_read_ext_allids () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #13 0x00007f1b3e8c7284 in keys2idl () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #14 0x00007f1b3e8c79e3 in ava_candidates.isra.0 () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #15 0x00007f1b3e8c7fd2 in filter_candidates_ext () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #16 0x00007f1b3e8c9096 in list_candidates () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #17 0x00007f1b3e8c7f40 in filter_candidates_ext () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #18 0x00007f1b3e90380c in subtree_candidates () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #19 0x00007f1b3e904e7f in ldbm_back_search () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #20 0x00007f1b4b2321d6 in op_shared_search () from
>>>         /usr/lib64/dirsrv/libslapd.so.0
>>>         No symbol table info available.
>>>         #21 0x00007f1b4b24294e in search_internal_callback_pb ()
>>>         from /usr/lib64/dirsrv/libslapd.so.0
>>>         No symbol table info available.
>>>         #22 0x00007f1b4b242be8 in search_internal_pb () from
>>>         /usr/lib64/dirsrv/libslapd.so.0
>>>         No symbol table info available.
>>>         #23 0x00007f1b4b72149b in ids_sasl_canon_user ()
>>>         No symbol table info available.
>>>         #24 0x00007f1b491e193b in _sasl_canon_user () from
>>>         /lib64/libsasl2.so.3
>>>         No symbol table info available.
>>>         #25 0x00007f1b491e1c4c in _sasl_canon_user_lookup () from
>>>         /lib64/libsasl2.so.3
>>>         No symbol table info available.
>>>         #26 0x00007f1b430e9fb9 in gssapi_server_mech_step () from
>>>         /usr/lib64/sasl2/libgssapiv2.so
>>>         No symbol table info available.
>>>         #27 0x00007f1b491edb9b in sasl_server_step () from
>>>         /lib64/libsasl2.so.3
>>>         No symbol table info available.
>>>         #28 0x00007f1b4b72283b in ids_sasl_check_bind ()
>>>         No symbol table info available.
>>>         #29 0x00007f1b4b70a61a in do_bind ()
>>>         No symbol table info available.
>>>         #30 0x00007f1b4b7113fd in connection_threadmain ()
>>>         No symbol table info available.
>>>         #31 0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #32 0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #33 0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 25 (Thread 0x7f1b0c7f8700 (LWP 105185)):
>>>         #0  0x00007f1b48dc56d5 in pthread_cond_wait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_wait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b4941b050 in PR_WaitCondVar () from
>>>         /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #2  0x00007f1b4b70efee in connection_wait_for_new_work ()
>>>         No symbol table info available.
>>>         #3  0x00007f1b4b710719 in connection_threadmain ()
>>>         No symbol table info available.
>>>         #4  0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #5  0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #6  0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 24 (Thread 0x7f1b0cff9700 (LWP 105184)):
>>>         #0  0x00007f1b48dc56d5 in pthread_cond_wait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_wait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b4941b050 in PR_WaitCondVar () from
>>>         /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #2  0x00007f1b4b70efee in connection_wait_for_new_work ()
>>>         No symbol table info available.
>>>         #3  0x00007f1b4b710719 in connection_threadmain ()
>>>         No symbol table info available.
>>>         #4  0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #5  0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #6  0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 23 (Thread 0x7f1b0d7fa700 (LWP 105183)):
>>>         #0  0x00007f1b48dc56d5 in pthread_cond_wait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_wait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b4941b050 in PR_WaitCondVar () from
>>>         /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #2  0x00007f1b4b70efee in connection_wait_for_new_work ()
>>>         No symbol table info available.
>>>         #3  0x00007f1b4b710719 in connection_threadmain ()
>>>         No symbol table info available.
>>>         #4  0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #5  0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #6  0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 22 (Thread 0x7f1b0dffb700 (LWP 105182)):
>>>         #0  0x00007f1b48dc56d5 in pthread_cond_wait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_wait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b4941b050 in PR_WaitCondVar () from
>>>         /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #2  0x00007f1b4b70efee in connection_wait_for_new_work ()
>>>         No symbol table info available.
>>>         #3  0x00007f1b4b710719 in connection_threadmain ()
>>>         No symbol table info available.
>>>         #4  0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #5  0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #6  0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 21 (Thread 0x7f1b0e7fc700 (LWP 105181)):
>>>         #0  0x00007f1b48dc56d5 in pthread_cond_wait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_wait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b4941b050 in PR_WaitCondVar () from
>>>         /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #2  0x00007f1b4b70efee in connection_wait_for_new_work ()
>>>         No symbol table info available.
>>>         #3  0x00007f1b4b710719 in connection_threadmain ()
>>>         No symbol table info available.
>>>         #4  0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #5  0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #6  0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 20 (Thread 0x7f1b0effd700 (LWP 105180)):
>>>         #0  0x00007f1b48dc56d5 in pthread_cond_wait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_wait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b433212f3 in __db_hybrid_mutex_suspend () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #2  0x00007f1b43320b37 in __db_tas_mutex_readlock () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #3  0x00007f1b4343ad35 in __memp_fget () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #4  0x00007f1b433e4333 in __dbc_iget () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #5  0x00007f1b433f2b02 in __dbc_get_pp () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #6  0x00007f1b3e8ce822 in idl_new_fetch () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #7  0x00007f1b3e8dcb26 in index_read_ext_allids () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #8  0x00007f1b3e8c7284 in keys2idl () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #9  0x00007f1b3e8c79e3 in ava_candidates.isra.0 () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #10 0x00007f1b3e8c7fd2 in filter_candidates_ext () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #11 0x00007f1b3e8c9096 in list_candidates () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #12 0x00007f1b3e8c7f40 in filter_candidates_ext () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #13 0x00007f1b3e8c9096 in list_candidates () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #14 0x00007f1b3e8c7f40 in filter_candidates_ext () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #15 0x00007f1b3e8c9096 in list_candidates () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #16 0x00007f1b3e8c7f40 in filter_candidates_ext () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #17 0x00007f1b3e90380c in subtree_candidates () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #18 0x00007f1b3e904e7f in ldbm_back_search () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #19 0x00007f1b4b2321d6 in op_shared_search () from
>>>         /usr/lib64/dirsrv/libslapd.so.0
>>>         No symbol table info available.
>>>         #20 0x00007f1b4b72333e in do_search ()
>>>         No symbol table info available.
>>>         #21 0x00007f1b4b7113c3 in connection_threadmain ()
>>>         No symbol table info available.
>>>         #22 0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #23 0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #24 0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 19 (Thread 0x7f1b0f7fe700 (LWP 105179)):
>>>         #0  0x00007f1b48dc56d5 in pthread_cond_wait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_wait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b433212f3 in __db_hybrid_mutex_suspend () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #2  0x00007f1b43320640 in __db_tas_mutex_lock () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #3  0x00007f1b433cad3a in __lock_get_internal () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #4  0x00007f1b433cb820 in __lock_get () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #5  0x00007f1b433f7142 in __db_lget () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #6  0x00007f1b4333e605 in __bam_search () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #7  0x00007f1b43329256 in __bamc_search () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #8  0x00007f1b4332ad0f in __bamc_get () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #9  0x00007f1b433e3ca6 in __dbc_iget () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #10 0x00007f1b433f2b02 in __dbc_get_pp () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #11 0x00007f1b3e8ce680 in idl_new_fetch () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #12 0x00007f1b3e8dcb26 in index_read_ext_allids () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #13 0x00007f1b3e8c7284 in keys2idl () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #14 0x00007f1b3e8c79e3 in ava_candidates.isra.0 () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #15 0x00007f1b3e8c7fd2 in filter_candidates_ext () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #16 0x00007f1b3e8c9096 in list_candidates () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #17 0x00007f1b3e8c7f40 in filter_candidates_ext () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #18 0x00007f1b3e8c9096 in list_candidates () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #19 0x00007f1b3e8c7f40 in filter_candidates_ext () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #20 0x00007f1b3e8c9096 in list_candidates () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #21 0x00007f1b3e8c7f40 in filter_candidates_ext () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #22 0x00007f1b3e90380c in subtree_candidates () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #23 0x00007f1b3e904e7f in ldbm_back_search () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #24 0x00007f1b4b2321d6 in op_shared_search () from
>>>         /usr/lib64/dirsrv/libslapd.so.0
>>>         No symbol table info available.
>>>         #25 0x00007f1b4b72333e in do_search ()
>>>         No symbol table info available.
>>>         #26 0x00007f1b4b7113c3 in connection_threadmain ()
>>>         No symbol table info available.
>>>         #27 0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #28 0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #29 0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 18 (Thread 0x7f1b0ffff700 (LWP 105178)):
>>>         #0  0x00007f1b48dc56d5 in pthread_cond_wait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_wait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b4941b050 in PR_WaitCondVar () from
>>>         /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #2  0x00007f1b4b70efee in connection_wait_for_new_work ()
>>>         No symbol table info available.
>>>         #3  0x00007f1b4b710719 in connection_threadmain ()
>>>         No symbol table info available.
>>>         #4  0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #5  0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #6  0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 17 (Thread 0x7f1b14d28700 (LWP 105177)):
>>>         #0  0x00007f1b48dc56d5 in pthread_cond_wait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_wait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b4941b050 in PR_WaitCondVar () from
>>>         /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #2  0x00007f1b4b70efee in connection_wait_for_new_work ()
>>>         No symbol table info available.
>>>         #3  0x00007f1b4b710719 in connection_threadmain ()
>>>         No symbol table info available.
>>>         #4  0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #5  0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #6  0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 16 (Thread 0x7f1b15529700 (LWP 105176)):
>>>         #0  0x00007f1b48dc56d5 in pthread_cond_wait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_wait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b4941b050 in PR_WaitCondVar () from
>>>         /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #2  0x00007f1b4b70efee in connection_wait_for_new_work ()
>>>         No symbol table info available.
>>>         #3  0x00007f1b4b710719 in connection_threadmain ()
>>>         No symbol table info available.
>>>         #4  0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #5  0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #6  0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 15 (Thread 0x7f1b15d2a700 (LWP 105175)):
>>>         #0  0x00007f1b48dc56d5 in pthread_cond_wait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_wait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b4941b050 in PR_WaitCondVar () from
>>>         /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #2  0x00007f1b4b70efee in connection_wait_for_new_work ()
>>>         No symbol table info available.
>>>         #3  0x00007f1b4b710719 in connection_threadmain ()
>>>         No symbol table info available.
>>>         #4  0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #5  0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #6  0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 14 (Thread 0x7f1b1652b700 (LWP 105174)):
>>>         #0  0x00007f1b48dc56d5 in pthread_cond_wait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_wait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b4941b050 in PR_WaitCondVar () from
>>>         /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #2  0x00007f1b4b70efee in connection_wait_for_new_work ()
>>>         No symbol table info available.
>>>         #3  0x00007f1b4b710719 in connection_threadmain ()
>>>         No symbol table info available.
>>>         #4  0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #5  0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #6  0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 13 (Thread 0x7f1b16d2c700 (LWP 105173)):
>>>         #0  0x00007f1b48dc56d5 in pthread_cond_wait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_wait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b433212f3 in __db_hybrid_mutex_suspend () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #2  0x00007f1b43320640 in __db_tas_mutex_lock () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #3  0x00007f1b433cad3a in __lock_get_internal () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #4  0x00007f1b433cb820 in __lock_get () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #5  0x00007f1b433f7142 in __db_lget () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #6  0x00007f1b4333e605 in __bam_search () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #7  0x00007f1b43329256 in __bamc_search () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #8  0x00007f1b4332ad0f in __bamc_get () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #9  0x00007f1b433e3ca6 in __dbc_iget () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #10 0x00007f1b433f2b02 in __dbc_get_pp () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #11 0x00007f1b3e8ce680 in idl_new_fetch () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #12 0x00007f1b3e8dcb26 in index_read_ext_allids () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #13 0x00007f1b3e8c7284 in keys2idl () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #14 0x00007f1b3e8c79e3 in ava_candidates.isra.0 () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #15 0x00007f1b3e8c7fd2 in filter_candidates_ext () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #16 0x00007f1b3e8c9096 in list_candidates () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #17 0x00007f1b3e8c7f40 in filter_candidates_ext () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #18 0x00007f1b3e8c9096 in list_candidates () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #19 0x00007f1b3e8c7f40 in filter_candidates_ext () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #20 0x00007f1b3e8c9096 in list_candidates () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #21 0x00007f1b3e8c7f40 in filter_candidates_ext () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #22 0x00007f1b3e90380c in subtree_candidates () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #23 0x00007f1b3e904e7f in ldbm_back_search () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #24 0x00007f1b4b2321d6 in op_shared_search () from
>>>         /usr/lib64/dirsrv/libslapd.so.0
>>>         No symbol table info available.
>>>         #25 0x00007f1b4b72333e in do_search ()
>>>         No symbol table info available.
>>>         #26 0x00007f1b4b7113c3 in connection_threadmain ()
>>>         No symbol table info available.
>>>         #27 0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #28 0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #29 0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 12 (Thread 0x7f1b1752d700 (LWP 105172)):
>>>         #0  0x00007f1b48dc56d5 in pthread_cond_wait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_wait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b4941b050 in PR_WaitCondVar () from
>>>         /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #2  0x00007f1b4b70efee in connection_wait_for_new_work ()
>>>         No symbol table info available.
>>>         #3  0x00007f1b4b710719 in connection_threadmain ()
>>>         No symbol table info available.
>>>         #4  0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #5  0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #6  0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 11 (Thread 0x7f1b17d2e700 (LWP 105171)):
>>>         #0  0x00007f1b48dc56d5 in pthread_cond_wait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_wait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b4941b050 in PR_WaitCondVar () from
>>>         /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #2  0x00007f1b4b70efee in connection_wait_for_new_work ()
>>>         No symbol table info available.
>>>         #3  0x00007f1b4b710719 in connection_threadmain ()
>>>         No symbol table info available.
>>>         #4  0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #5  0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #6  0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 10 (Thread 0x7f1b2509d700 (LWP 105168)):
>>>         #0  0x00007f1b48dc5a82 in
>>>         pthread_cond_timedwait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_timedwait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b4941ab07 in pt_TimedWait () from
>>>         /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #2  0x00007f1b4941afce in PR_WaitCondVar () from
>>>         /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #3  0x00007f1b4b2061e8 in eq_loop () from
>>>         /usr/lib64/dirsrv/libslapd.so.0
>>>         No symbol table info available.
>>>         #4  0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #5  0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #6  0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 9 (Thread 0x7f1b2589e700 (LWP 105167)):
>>>         #0  0x00007f1b48dc5a82 in
>>>         pthread_cond_timedwait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_timedwait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b4941ab07 in pt_TimedWait () from
>>>         /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #2  0x00007f1b4941afce in PR_WaitCondVar () from
>>>         /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #3  0x00007f1b4b719d03 in housecleaning ()
>>>         No symbol table info available.
>>>         #4  0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #5  0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #6  0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 8 (Thread 0x7f1b2609f700 (LWP 105166)):
>>>         #0  0x00007f1b48dc56d5 in pthread_cond_wait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_wait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b4941b050 in PR_WaitCondVar () from
>>>         /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #2  0x00007f1b4b260198 in slapi_wait_condvar () from
>>>         /usr/lib64/dirsrv/libslapd.so.0
>>>         No symbol table info available.
>>>         #3  0x00007f1b3cf5deed in roles_cache_wait_on_change () from
>>>         /usr/lib64/dirsrv/plugins/libroles-plugin.so
>>>         No symbol table info available.
>>>         #4  0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #5  0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #6  0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 7 (Thread 0x7f1b268a0700 (LWP 105165)):
>>>         #0  0x00007f1b48dc56d5 in pthread_cond_wait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_wait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b4941b050 in PR_WaitCondVar () from
>>>         /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #2  0x00007f1b4b260198 in slapi_wait_condvar () from
>>>         /usr/lib64/dirsrv/libslapd.so.0
>>>         No symbol table info available.
>>>         #3  0x00007f1b3cf5deed in roles_cache_wait_on_change () from
>>>         /usr/lib64/dirsrv/plugins/libroles-plugin.so
>>>         No symbol table info available.
>>>         #4  0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #5  0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #6  0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 6 (Thread 0x7f1b270a1700 (LWP 105164)):
>>>         #0  0x00007f1b48dc56d5 in pthread_cond_wait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_wait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b4941b050 in PR_WaitCondVar () from
>>>         /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #2  0x00007f1b4b260198 in slapi_wait_condvar () from
>>>         /usr/lib64/dirsrv/libslapd.so.0
>>>         No symbol table info available.
>>>         #3  0x00007f1b3cf5deed in roles_cache_wait_on_change () from
>>>         /usr/lib64/dirsrv/plugins/libroles-plugin.so
>>>         No symbol table info available.
>>>         #4  0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #5  0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #6  0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 5 (Thread 0x7f1b278a2700 (LWP 105163)):
>>>         #0  0x00007f1b48dc56d5 in pthread_cond_wait@@GLIBC_2.3.2
>>>         <mailto:pthread_cond_wait@@GLIBC_2.3.2> () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #1  0x00007f1b4941b050 in PR_WaitCondVar () from
>>>         /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #2  0x00007f1b4b260198 in slapi_wait_condvar () from
>>>         /usr/lib64/dirsrv/libslapd.so.0
>>>         No symbol table info available.
>>>         #3  0x00007f1b415f262e in cos_cache_wait_on_change () from
>>>         /usr/lib64/dirsrv/plugins/libcos-plugin.so
>>>         No symbol table info available.
>>>         #4  0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #5  0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #6  0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 4 (Thread 0x7f1b282ac700 (LWP 105162)):
>>>         #0  0x00007f1b48ae69b3 in select () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>         #1  0x00007f1b4b2710e9 in DS_Sleep () from
>>>         /usr/lib64/dirsrv/libslapd.so.0
>>>         No symbol table info available.
>>>         #2  0x00007f1b3e8ba707 in perf_threadmain () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #3  0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #4  0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #5  0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 3 (Thread 0x7f1b28aad700 (LWP 105161)):
>>>         #0  0x00007f1b48ae69b3 in select () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>         #1  0x00007f1b4b2710e9 in DS_Sleep () from
>>>         /usr/lib64/dirsrv/libslapd.so.0
>>>         No symbol table info available.
>>>         #2  0x00007f1b3e8bfb7f in trickle_threadmain () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #3  0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #4  0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #5  0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 2 (Thread 0x7f1b292ae700 (LWP 105160)):
>>>         #0  0x00007f1b48ae69b3 in select () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>         #1  0x00007f1b4344dbad in __os_yield () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #2  0x00007f1b434492b3 in __memp_sync_int () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #3  0x00007f1b43459752 in __txn_checkpoint () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #4  0x00007f1b43459b74 in __txn_checkpoint_pp () from
>>>         /lib64/libdb-5.3.so <http://libdb-5.3.so>
>>>         No symbol table info available.
>>>         #5  0x00007f1b3e8c3a87 in checkpoint_threadmain () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #6  0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #7  0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #8  0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>         Thread 1 (Thread 0x7f1b29aaf700 (LWP 105159)):
>>>         #0  0x00007f1b48ae69b3 in select () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>         #1  0x00007f1b4b2710e9 in DS_Sleep () from
>>>         /usr/lib64/dirsrv/libslapd.so.0
>>>         No symbol table info available.
>>>         #2  0x00007f1b3e8bf907 in deadlock_threadmain () from
>>>         /usr/lib64/dirsrv/plugins/libback-ldbm.so
>>>         No symbol table info available.
>>>         #3  0x00007f1b494207bb in _pt_root () from /lib64/libnspr4.so
>>>         No symbol table info available.
>>>         #4  0x00007f1b48dc1dc5 in start_thread () from
>>>         /lib64/libpthread.so.0
>>>         No symbol table info available.
>>>         #5  0x00007f1b48aef28d in clone () from /lib64/libc.so.6
>>>         No symbol table info available.
>>>
>>>
>>>
>>>         Thanks,
>>>
>>>         Rakesh
>>>
>>>
>>>         On Mon, Sep 5, 2016 at 4:48 PM, thierry bordaz
>>>         <tbordaz at redhat.com <mailto:tbordaz at redhat.com>> wrote:
>>>
>>>
>>>
>>>             On 09/05/2016 12:05 PM, Rakesh Rajasekharan wrote:
>>>>             Hi Thierry,
>>>>
>>>>
>>>>             I was getting the hang issue while running
>>>>             ipa-client-install simultaneously on few clients..
>>>>             However, today, I am not able to replicate that.
>>>>
>>>>             I could not get a gdb . But i will try getting that the
>>>>             next time I face this issue.
>>>>
>>>>             The CPU does not stay high.. it just momentarily
>>>>             touches a high value and then drops down to around 2-7%
>>>>
>>>>             One question I have is , is it ok to set it
>>>>             nsslapd-threadnumber to a very high value .
>>>>             I have around 4000 clients and with
>>>>             nsslapd-maxthreadsperconn set to 5..So, can I set
>>>>             nsslapd-threadnumber to around 25000.
>>>
>>>             Hello,
>>>
>>>             I know some users running in production with several
>>>             hunderds of threads (>600) and this without problem.
>>>
>>>             I do not recall having suggested to increase that number
>>>             and for what reason.
>>>             Usually 30 workers is a good enough value. It can create
>>>             bootleneck if for some reason each operation is very
>>>             long to satisfy and exhaust the number of workers. You
>>>             can monitor the work queue:
>>>
>>>                 ldapsearch  -D "cn=directory manager" -w xxx -LLL -b
>>>                 "cn=monitor" -s base opsinitiated opscompleted
>>>
>>>
>>>             If opscompleted-opsinitiated remains close to
>>>             threadnumber, then yes it would be valuable to increase it.
>>>
>>>             The computation #client * #async_op_per_client sound an
>>>             overkill. Even if all clients send at the exact same
>>>             time all their requests, it is very likely that some
>>>             common resource (db page, log, allocator...) will
>>>             serialize them. If you monitor a need to increase the
>>>             work, you would for example set it to 50, then monitor,
>>>             then set it to 100, then monitor... until you find a
>>>             good enough value.
>>>             Note the increasing the #thread, increases the memory
>>>             footprint that will reduce the efficiency of file system
>>>             cache and can increase the response time.
>>>
>>>
>>>             best regards
>>>             thierry
>>>
>>>>
>>>>             Thanks
>>>>
>>>>             On Mon, Sep 5, 2016 at 1:03 PM, thierry bordaz
>>>>             <tbordaz at redhat.com <mailto:tbordaz at redhat.com>> wrote:
>>>>
>>>>
>>>>                 Hi Rakesh,
>>>>
>>>>                 Were you able to get a pstack or full stack with
>>>>                 gdb
>>>>                 (http://www.port389.org/docs/389ds/FAQ/faq.html#debugging-crashes)
>>>>                 when the server hangs ?
>>>>
>>>>                 If it happens with 500 threads as well as with 30,
>>>>                 using 30 threads is a better choice to debug this
>>>>                 issue.
>>>>                 I will try to reproduce using 150 parallel 'ipa
>>>>                 user-find p-testipa' commands
>>>>
>>>>                 Something I am unsure is if the CPU consumption
>>>>                 stays high (you mentioned 340% CPU usage) as long
>>>>                 as the hang happens or if after a suddent shot up
>>>>                 to 340% (that marks the beginning of the hang) it
>>>>                 drops and stay hanging ?
>>>>
>>>>                 thanks
>>>>                 thierry
>>>>
>>>>                 On 09/04/2016 08:40 PM, Rakesh Rajasekharan wrote:
>>>>>                 starce on the slapd process actually had this in
>>>>>                 the output..
>>>>>                 FUTEX_WAIT_PRIVATE
>>>>>
>>>>>                 and checking for the number of threads slapd had..
>>>>>                 there were 5015 threads
>>>>>
>>>>>                 ps -efL|grep slapd|wc -l
>>>>>                 5015
>>>>>
>>>>>                 strace on most of the threads gave this output
>>>>>
>>>>>                 strace -p 67411
>>>>>                 Process 67411 attached
>>>>>                 futex(0x7f3f0226b41c, FUTEX_WAIT_PRIVATE, 1, NULL)
>>>>>                 = -1 EAGAIN (Resource temporarily unavailable)
>>>>>                 futex(0x7f3f0226b41c, FUTEX_WAIT_PRIVATE, 2,
>>>>>                 NULL^CProcess 67411 detached
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>                 On Sun, Sep 4, 2016 at 5:34 PM, Rakesh
>>>>>                 Rajasekharan <rakesh.rajasekharan at gmail.com
>>>>>                 <mailto:rakesh.rajasekharan at gmail.com>> wrote:
>>>>>
>>>>>                     I have again got the issue of IPA hanging..
>>>>>                     The issue came up when i tried to run
>>>>>                     ipa-client-isntall on 142 clients simultaneously
>>>>>
>>>>>
>>>>>                     None of the IPA commands are responding, and I
>>>>>                     see this error
>>>>>
>>>>>                     ipa user-find p-testipa
>>>>>                     ipa: ERROR: Insufficient access: SASL(-1):
>>>>>                     generic failure: GSSAPI Error: Unspecified GSS
>>>>>                     failure. Minor code may provide more
>>>>>                     information (KDC returned error string:
>>>>>                     PROCESS_TGS)
>>>>>
>>>>>                      KRB5_TRACE=/dev/stdout kinit admin
>>>>>                     [41178] 1472984115.233214: Getting initial
>>>>>                     credentials for admin at XYZ.COM
>>>>>                     <mailto:admin at XYZ.COM>
>>>>>                     [41178] 1472984115.235257: Sending request
>>>>>                     (167 bytes) to XYZ.COM <http://XYZ.COM>
>>>>>                     [41178] 1472984115.235419: Initiating TCP
>>>>>                     connection to stream 10.1.3.36:88
>>>>>                     <http://10.1.3.36:88>
>>>>>                     [41178] 1472984115.235685: Sending TCP request
>>>>>                     to stream 10.1.3.36:88 <http://10.1.3.36:88>
>>>>>                     [41178] 1472984120.238914: Received answer
>>>>>                     (174 bytes) from stream 10.1.3.36:88
>>>>>                     <http://10.1.3.36:88>
>>>>>                     [41178] 1472984120.238925: Terminating TCP
>>>>>                     connection to stream 10.1.3.36:88
>>>>>                     <http://10.1.3.36:88>
>>>>>                     [41178] 1472984120.238993: Response was from
>>>>>                     master KDC
>>>>>                     [41
>>>>>
>>>>>
>>>>>                     Running an ldapsearch to see the db.. does not
>>>>>                     give any results and just hangs there
>>>>>
>>>>>                     ldapsearch -x -D 'cn=Directory Manager' -W -s
>>>>>                     one -b 'cn=kerberos,dc=xyz,dc=com'
>>>>>                     Enter LDAP Password:
>>>>>
>>>>>                     even an ldapsearch -x does not respond
>>>>>                     At this point, am sure that slapd is the one
>>>>>                     causing issues
>>>>>
>>>>>                     Running an strace against the hung slapd
>>>>>                     itself seems to get stuck does not proceed
>>>>>                     after saying "attaching to process"
>>>>>
>>>>>                     From some others posts I read Thierry
>>>>>                     suggesting to increase the
>>>>>                     nsslapd-threadnumber value
>>>>>
>>>>>                     It was set to 30, I think that might be too low.
>>>>>
>         ...
>
>         [Message clipped] 
>
>
>

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