[Freeipa-users] Freeipa 4.2.0 hangs intermittently

thierry bordaz tbordaz at redhat.com
Mon Sep 5 12:37:53 UTC 2016


Hi Rakesh,

Looking at this monitoring I do not see any reason to increase the 
number of worker threads.
It shows that (before the hang), only one thread (out of 30) was busy.
When the hang occurred, 7 threads (out of 30) were busy.

regards
thierry

On 09/05/2016 02:14 PM, Rakesh Rajasekharan wrote:
> btw the values for opscompleted and opsinitiated are
>
> ldapsearch  -D "cn=directory manager" -w xxxx -LLL -b "cn=monitor" -s 
> base opsinitiated opscompleted
> dn: cn=monitor
> opsinitiated: 25655
> opscompleted: 25654
>
> Thanks
>
> On Mon, Sep 5, 2016 at 5:35 PM, Rakesh Rajasekharan 
> <rakesh.rajasekharan at gmail.com <mailto:rakesh.rajasekharan at gmail.com>> 
> 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 () 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 () 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 () 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 () 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 () 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 () 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 () 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 () 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 () 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 () 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 () 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 () 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 () 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 () 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 () 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 () 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 () 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 () 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 () 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 () 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 () 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 () 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 () 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 () 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 () 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 () 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 () 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 () 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 () 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 () 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 () 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 () 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 () 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 ()
>     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 ()
>     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 () 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 () 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 () 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 () 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.
>>>
>>>                 I have raised it to  500
>>>
>>>                 Now after restarting the service .. ldapsearch
>>>                 starts responding.
>>>                 But running the test to add a sudden high number of
>>>                 clients again left ns-slapd to hung state
>>>
>>>                 When i attempted adding the clients.. the ns-slapd
>>>                 cpu usage shot up to 340% and after that ns-slapd
>>>                 stopped responding
>>>
>>>                 So now, atleast I know what might be causing the
>>>                 issue and I can now easily reproduce it.
>>>
>>>                 Is there a way I can make ns-slapd handle a sudden
>>>                 bump in incoming request for ipa-client-install
>>>
>>>                 Thanks
>>>                 Rakesh
>>>
>>>
>>>
>>>
>>>
>>>
>>>                 On Mon, Aug 29, 2016 at 11:18 PM, Rich Megginson
>>>                 <rmeggins at redhat.com <mailto:rmeggins at redhat.com>>
>>>                 wrote:
>>>
>>>                     On 08/29/2016 10:53 AM, Rakesh Rajasekharan wrote:
>>>>                     Hi Thierry,
>>>>
>>>>                     My machine has 30GB RAM ..and  389-ds version
>>>>                     is 1.3.4
>>>>
>>>>                     ldapsearch shows the values for
>>>>                     nsslapd-cachememsize updated to 200MB.
>>>>
>>>>                     ldapsearch -LLL -o ldif-wrap=no -D
>>>>                     "cn=directory manager" -w 'mypassword' -b
>>>>                     'cn=userRoot,cn=ldbm
>>>>                     database,cn=plugins,cn=config'|grep
>>>>                     nsslapd-cachememsize
>>>>                     nsslapd-cachememsize: 209715200
>>>>
>>>>
>>>>                     So, it seems to have updated though seeing that
>>>>                     warning(WARNING: ipaca: entry cache size
>>>>                     10485760B is less than db size 11599872B) in
>>>>                     the log confuses me a bit.
>>>>
>>>>                     Thers one more entry that I found from the
>>>>                     ldapsearch to be bit low
>>>>
>>>>                     nsslapd-dncachememsize: 10485760
>>>>                     maxdncachesize: 10485760
>>>>
>>>>                     Should I update these as well to a higher value
>>>>
>>>>                     At the time when the issue happened, the memory
>>>>                     usage as well as the overall load of the system
>>>>                     was very low .
>>>>                     I will try reproducing the issue atleast in my
>>>>                     QA env..probably by trying to mock simultaneous
>>>>                     parallel logins to a large number of hosts
>>>
>>>                     To monitor your cache sizes, please use the
>>>                     dbmon.sh tool provided with your distro.  If
>>>                     that is not available with your particular
>>>                     distro, see
>>>                     https://github.com/richm/scripts/wiki/dbmon.sh
>>>                     <https://github.com/richm/scripts/wiki/dbmon.sh>
>>>
>>>
>>>>
>>>>
>>>>                     thanks
>>>>                     Rakesh
>>>>
>>>>
>>>>
>>>>
>>>>                     On Mon, Aug 29, 2016 at 8:16 PM, thierry bordaz
>>>>                     <tbordaz at redhat.com
>>>>                     <mailto:tbordaz at redhat.com>> wrote:
>>>>
>>>>                         Hi Rakesh,
>>>>
>>>>                         Those tuning may depend on the memory
>>>>                         available on your machine.
>>>>                         nsslapd-cachememsize allows the entry cache
>>>>                         to consume up to 200Mb but its memory
>>>>                         footprint is known to go above.
>>>>                         200Mb both looks pretty good to me. How
>>>>                         large is your machine ? What is your
>>>>                         version of 389-ds ?
>>>>
>>>>                         Those warnings do not change your settings.
>>>>                         It just raise that entry cache of 'ipaca'
>>>>                         and 'retrocl' are small but it is fine. The
>>>>                         size of the entry cache is important mostly
>>>>                         in userRoot.
>>>>                         You may double check the actual values,
>>>>                         after restart, with ldapsearch on
>>>>                         'cn=userRoot,cn=ldbm
>>>>                         database,cn=plugins,cn=config' and
>>>>                         'cn=config,cn=ldbm
>>>>                         database,cn=plugins,cn=config'.
>>>>
>>>>                         A step is to know what will be response
>>>>                         time of DS to know if it is responsible of
>>>>                         the hang or not.
>>>>                         The logs and possibly pstack during those
>>>>                         intermittent hangs will help to determine that.
>>>>
>>>>                         regards
>>>>                         thierry
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>                         On 08/29/2016 04:25 PM, Rakesh Rajasekharan
>>>>                         wrote:
>>>>>                         I tried increasing the nsslapd-dbcachesize
>>>>>                         and nsslapd-cachememsize in my QA envs to
>>>>>                         200MB.
>>>>>
>>>>>                         However, in my log files, I still see this
>>>>>                         message
>>>>>                         [29/Aug/2016:04:34:37 +0000] - WARNING:
>>>>>                         ipaca: entry cache size 10485760B is less
>>>>>                         than db size 11599872B; We recommend to
>>>>>                         increase the entry cache size
>>>>>                         nsslapd-cachememsize.
>>>>>                         [29/Aug/2016:04:34:37 +0000] - WARNING:
>>>>>                         changelog: entry cache size 2097152B is
>>>>>                         less than db size 441647104B; We recommend
>>>>>                         to increase the entry cache size
>>>>>                         nsslapd-cachememsize.
>>>>>
>>>>>                         these are my ldif files that i used to
>>>>>                         modify the values
>>>>>                         modify entry cache size
>>>>>                         cat modify-cache-mem-size.ldif
>>>>>                         dn: cn=userRoot,cn=ldbm
>>>>>                         database,cn=plugins,cn=config
>>>>>                         changetype: modify
>>>>>                         replace: nsslapd-cachememsize
>>>>>                         nsslapd-cachememsize: 209715200
>>>>>
>>>>>                         modify db cache size
>>>>>                         cat modfy-db-cache-size.ldif
>>>>>                         dn: cn=config,cn=ldbm
>>>>>                         database,cn=plugins,cn=config
>>>>>                         changetype: modify
>>>>>                         replace: nsslapd-dbcachesize
>>>>>                         nsslapd-dbcachesize: 209715200
>>>>>
>>>>>                         After modifying , i restarted IPA services
>>>>>
>>>>>                         Is there anything else that  I need to
>>>>>                         take care of as the logs suggest its still
>>>>>                         not getting the updated values
>>>>>
>>>>>                         Thanks
>>>>>                         Rakesh
>>>>>
>>>>>                         On Mon, Aug 29, 2016 at 6:07 PM, Rakesh
>>>>>                         Rajasekharan
>>>>>                         <rakesh.rajasekharan at gmail.com
>>>>>                         <mailto:rakesh.rajasekharan at gmail.com>> wrote:
>>>>>
>>>>>                             Hi Thierry,
>>>>>
>>>>>                             Coz of the issues we had to revert
>>>>>                             back to earlier running openldap in
>>>>>                             production.
>>>>>
>>>>>                             I have now done a few TCP related
>>>>>                             changes in sysctl.conf and have also
>>>>>                             increased the nsslapd-dbcachesize and
>>>>>                             nsslapd-cachememsize to 200MB
>>>>>
>>>>>                             I will again start migrating hosts
>>>>>                             back to IPA and see if I face the
>>>>>                             earlier issue.
>>>>>
>>>>>                             I will update back once I have something
>>>>>
>>>>>
>>>>>                             Thanks,
>>>>>                             Rakesh
>>>>>
>>>>>
>>>>>
>>>>>                             On Thu, Aug 25, 2016 at 2:17 PM,
>>>>>                             thierry bordaz <tbordaz at redhat.com
>>>>>                             <mailto:tbordaz at redhat.com>> wrote:
>>>>>
>>>>>
>>>>>
>>>>>                                 On 08/25/2016 10:15 AM, Rakesh
>>>>>                                 Rajasekharan wrote:
>>>>>>                                 All of the troubleshooting seems
>>>>>>                                 fine.
>>>>>>
>>>>>>
>>>>>>                                 However, Running libconv.pl
>>>>>>                                 <http://libconv.pl> gives me this
>>>>>>                                 output
>>>>>>
>>>>>>                                 ----- Recommendations -----
>>>>>>
>>>>>>                                  1.  You have unindexed
>>>>>>                                 components, this can be caused
>>>>>>                                 from a search on an unindexed
>>>>>>                                 attribute, or your returned
>>>>>>                                 results exceeded the
>>>>>>                                 allidsthreshold. Unindexed
>>>>>>                                 components are not recommended.
>>>>>>                                 To refuse unindexed searches,
>>>>>>                                 switch 'nsslapd-require-index' to
>>>>>>                                 'on' under your database entry
>>>>>>                                 (e.g. cn=UserRoot,cn=ldbm
>>>>>>                                 database,cn=plugins,cn=config).
>>>>>>
>>>>>>                                  2.  You have a significant
>>>>>>                                 difference between binds and
>>>>>>                                 unbinds. You may want to
>>>>>>                                 investigate this difference.
>>>>>>
>>>>>>
>>>>>>                                 I feel, this could be a pointer
>>>>>>                                 to things going slow.. and IPA
>>>>>>                                 hanging. I think i now have
>>>>>>                                 something that I can try and nail
>>>>>>                                 down this issue.
>>>>>>
>>>>>>                                 On a sidenote, I was earlier
>>>>>>                                 running openldap and migrated
>>>>>>                                 over to Freeipa,
>>>>>>
>>>>>>                                 Thanks
>>>>>>                                 Rakesh
>>>>>>
>>>>>>
>>>>>>
>>>>>>                                 On Wed, Aug 24, 2016 at 12:38 PM,
>>>>>>                                 Petr Spacek <pspacek at redhat.com
>>>>>>                                 <mailto:pspacek at redhat.com>> wrote:
>>>>>>
>>>>>>                                     On 23.8.2016 18:44, Rakesh
>>>>>>                                     Rajasekharan wrote:
>>>>>>                                     > I think thers something
>>>>>>                                     seriously wrong with my system
>>>>>>                                     >
>>>>>>                                     > not able to run any IPA
>>>>>>                                     commands
>>>>>>                                     >
>>>>>>                                     > klist
>>>>>>                                     > Ticket cache:
>>>>>>                                     KEYRING:persistent:0:0
>>>>>>                                     > Default principal:
>>>>>>                                     admin at XYZ.COM
>>>>>>                                     <mailto:admin at XYZ.COM>
>>>>>>                                     >
>>>>>>                                     > Valid starting  Expires
>>>>>>                                     Service principal
>>>>>>                                     > 2016-08-23T16:26:36
>>>>>>                                     2016-08-24T16:26:22
>>>>>>                                     krbtgt/XYZ.COM at XYZ.COM
>>>>>>                                     <mailto:XYZ.COM at XYZ.COM>
>>>>>>                                     >
>>>>>>                                     >
>>>>>>                                     > [root at prod-ipa-master-1a
>>>>>>                                     :~] ipactl status
>>>>>>                                     > Directory Service: RUNNING
>>>>>>                                     > krb5kdc Service: RUNNING
>>>>>>                                     > kadmin Service: RUNNING
>>>>>>                                     > ipa_memcached Service: RUNNING
>>>>>>                                     > httpd Service: RUNNING
>>>>>>                                     > pki-tomcatd Service: RUNNING
>>>>>>                                     > ipa-otpd Service: RUNNING
>>>>>>                                     > ipa: INFO: The ipactl
>>>>>>                                     command was successful
>>>>>>                                     >
>>>>>>                                     >
>>>>>>                                     >
>>>>>>                                     > [root at prod-ipa-master :~]
>>>>>>                                     ipa user-find p-testuser
>>>>>>                                     > ipa: ERROR: Kerberos error:
>>>>>>                                     ('Unspecified GSS failure.
>>>>>>                                     Minor code may
>>>>>>                                     > provide more information',
>>>>>>                                     851968)/("Cannot contact any
>>>>>>                                     KDC for realm '
>>>>>>                                     > XYZ.COM <http://XYZ.COM>'",
>>>>>>                                     -1765328228)
>>>>>>
>>>>>
>>>>>                                 Hi Rakesh,
>>>>>
>>>>>                                     Having a reproducible test
>>>>>                                     case would you rerun the
>>>>>                                     command above.
>>>>>                                     During its processing you may
>>>>>                                     monitor DS process load (top).
>>>>>                                     If it is high, you may get
>>>>>                                     some pstacks of it.
>>>>>                                     Also would you attach the part
>>>>>                                     of DS access logs taken during
>>>>>                                     the command.
>>>>>
>>>>>                                     regards
>>>>>                                     thierry
>>>>>
>>>>>>                                     >
>>>>>>
>>>>>>                                     This is weird because the
>>>>>>                                     server seems to be up.
>>>>>>
>>>>>>                                     Please follow
>>>>>>                                     http://www.freeipa.org/page/Troubleshooting#Authentication.2FKerberos
>>>>>>
>>>>>>                                     Petr^2 Spacek
>>>>>>
>>>>>>                                     >
>>>>>>                                     >
>>>>>>                                     > Thanks
>>>>>>                                     >
>>>>>>                                     > Rakesh
>>>>>>                                     >
>>>>>>                                     > On Tue, Aug 23, 2016 at
>>>>>>                                     10:01 PM, Rakesh Rajasekharan <
>>>>>>                                     >
>>>>>>                                     rakesh.rajasekharan at gmail.com
>>>>>>                                     <mailto:rakesh.rajasekharan at gmail.com>>
>>>>>>                                     wrote:
>>>>>>                                     >
>>>>>>                                     >> i changed the loggin level
>>>>>>                                     to 4 . Modifying
>>>>>>                                     nsslapd-accesslog-level
>>>>>>                                     >>
>>>>>>                                     >> But, the hang is still
>>>>>>                                     there. though I dont see the
>>>>>>                                     sigfault now
>>>>>>                                     >>
>>>>>>                                     >>
>>>>>>                                     >>
>>>>>>                                     >>
>>>>>>                                     >> On Tue, Aug 23, 2016 at
>>>>>>                                     9:02 PM, Rakesh Rajasekharan <
>>>>>>                                     >>
>>>>>>                                     rakesh.rajasekharan at gmail.com
>>>>>>                                     <mailto:rakesh.rajasekharan at gmail.com>>
>>>>>>                                     wrote:
>>>>>>                                     >>
>>>>>>                                     >>> My disk was getting
>>>>>>                                     filled too fast
>>>>>>                                     >>>
>>>>>>                                     >>> logs under
>>>>>>                                     /var/log/dirsrv was coming
>>>>>>                                     around 5 gb quickly filling up
>>>>>>                                     >>>
>>>>>>                                     >>> Is there a way to make
>>>>>>                                     the logging less verbose
>>>>>>                                     >>>
>>>>>>                                     >>>
>>>>>>                                     >>>
>>>>>>                                     >>> On Tue, Aug 23, 2016 at
>>>>>>                                     6:41 PM, Petr Spacek
>>>>>>                                     <pspacek at redhat.com
>>>>>>                                     <mailto:pspacek at redhat.com>>
>>>>>>                                     wrote:
>>>>>>                                     >>>
>>>>>>                                     >>>> On 23.8.2016 15:07,
>>>>>>                                     Rakesh Rajasekharan wrote:
>>>>>>                                     >>>>> I was able to fix that
>>>>>>                                     may be temporarily... when i
>>>>>>                                     checked the
>>>>>>                                     >>>> network..
>>>>>>                                     >>>>> there was another
>>>>>>                                     process that was running and
>>>>>>                                     consuming a lot of
>>>>>>                                     >>>> network (
>>>>>>                                     >>>>> i have no idea who did
>>>>>>                                     that. I need to seriously
>>>>>>                                     start restricting
>>>>>>                                     >>>> people
>>>>>>                                     >>>>> access to this machine )
>>>>>>                                     >>>>>
>>>>>>                                     >>>>> after killing that
>>>>>>                                     perfomance improved drastically
>>>>>>                                     >>>>>
>>>>>>                                     >>>>> But now, suddenly I
>>>>>>                                     started experiencing the same
>>>>>>                                     hang.
>>>>>>                                     >>>>>
>>>>>>                                     >>>>> This time , I gert the
>>>>>>                                     following error when checked
>>>>>>                                     dmesg
>>>>>>                                     >>>>>
>>>>>>                                     >>>>> [  301.236976]
>>>>>>                                     ns-slapd[3124]: segfault at 0
>>>>>>                                     ip 00007f1de416951c sp
>>>>>>                                     >>>>> 00007f1dee1dba70 error
>>>>>>                                     4 in
>>>>>>                                     libcos-plugin.so[7f1de4166000+b000]
>>>>>>                                     >>>>> [ 1116.248431] TCP:
>>>>>>                                     request_sock_TCP: Possible
>>>>>>                                     SYN flooding on port 88.
>>>>>>                                     >>>>> Sending cookies. Check
>>>>>>                                     SNMP counters.
>>>>>>                                     >>>>> [11831.397037]
>>>>>>                                     ns-slapd[22550]: segfault at
>>>>>>                                     0 ip 00007f533d82251c sp
>>>>>>                                     >>>>> 00007f5347894a70 error
>>>>>>                                     4 in
>>>>>>                                     libcos-plugin.so[7f533d81f000+b000]
>>>>>>                                     >>>>> [11832.727989]
>>>>>>                                     ns-slapd[22606]: segfault at
>>>>>>                                     0 ip 00007f6231eb951c sp
>>>>>>                                     >>>>> 00007f623bf2ba70 error
>>>>>>                                     4 in
>>>>>>                                     libcos-plugin.so[7f6231eb6000+b00
>>>>>>                                     >>>>
>>>>>>                                     >>>> Okay, this one is
>>>>>>                                     serious. The LDAP server crashed.
>>>>>>                                     >>>>
>>>>>>                                     >>>> 1. Make sure all your
>>>>>>                                     packages are up-to-date.
>>>>>>                                     >>>>
>>>>>>                                     >>>> Please see
>>>>>>                                     >>>>
>>>>>>                                     http://directory.fedoraproject.org/docs/389ds/FAQ/faq.html#d
>>>>>>                                     >>>> ebugging-crashes
>>>>>>                                     >>>> for further instructions
>>>>>>                                     how to debug this.
>>>>>>                                     >>>>
>>>>>>                                     >>>> Petr^2 Spacek
>>>>>>                                     >>>>
>>>>>>                                     >>>>>
>>>>>>                                     >>>>> and in
>>>>>>                                     /var/log/dirsrv/example-com/errors
>>>>>>                                     >>>>>
>>>>>>                                     >>>>> [23/Aug/2016:12:49:36
>>>>>>                                     +0000] DSRetroclPlugin -
>>>>>>                                     delete_changerecord:
>>>>>>                                     >>>> could
>>>>>>                                     >>>>> not delete change
>>>>>>                                     record 3291138 (rc: 32)
>>>>>>                                     >>>>> [23/Aug/2016:12:49:36
>>>>>>                                     +0000] DSRetroclPlugin -
>>>>>>                                     delete_changerecord:
>>>>>>                                     >>>> could
>>>>>>                                     >>>>> not delete change
>>>>>>                                     record 3291139 (rc: 32)
>>>>>>                                     >>>>> [23/Aug/2016:12:49:36
>>>>>>                                     +0000] DSRetroclPlugin -
>>>>>>                                     delete_changerecord:
>>>>>>                                     >>>> could
>>>>>>                                     >>>>> not delete change
>>>>>>                                     record 3291140 (rc: 32)
>>>>>>                                     >>>>> [23/Aug/2016:12:49:36
>>>>>>                                     +0000] DSRetroclPlugin -
>>>>>>                                     delete_changerecord:
>>>>>>                                     >>>> could
>>>>>>                                     >>>>> not delete change
>>>>>>                                     record 3291141 (rc: 32)
>>>>>>                                     >>>>> [23/Aug/2016:12:49:36
>>>>>>                                     +0000] DSRetroclPlugin -
>>>>>>                                     delete_changerecord:
>>>>>>                                     >>>> could
>>>>>>                                     >>>>> not delete change
>>>>>>                                     record 3291142 (rc: 32)
>>>>>>                                     >>>>> [23/Aug/2016:12:49:36
>>>>>>                                     +0000] DSRetroclPlugin -
>>>>>>                                     delete_changerecord:
>>>>>>                                     >>>> could
>>>>>>                                     >>>>> not delete change
>>>>>>                                     record 3291143 (rc: 32)
>>>>>>                                     >>>>> [23/Aug/2016:12:49:36
>>>>>>                                     +0000] DSRetroclPlugin -
>>>>>>                                     delete_changerecord:
>>>>>>                                     >>>> could
>>>>>>                                     >>>>> not delete change
>>>>>>                                     record 3291144 (rc: 32)
>>>>>>                                     >>>>> [23/Aug/2016:12:49:36
>>>>>>                                     +0000] DSRetroclPlugin -
>>>>>>                                     delete_changerecord:
>>>>>>                                     >>>> could
>>>>>>                                     >>>>> not delete change
>>>>>>                                     record 3291145 (rc: 32)
>>>>>>                                     >>>>> [23/Aug/2016:12:49:50
>>>>>>                                     +0000] - Retry count exceeded
>>>>>>                                     in delete
>>>>>>                                     >>>>> [23/Aug/2016:12:49:50
>>>>>>                                     +0000] DSRetroclPlugin -
>>>>>>                                     delete_changerecord:
>>>>>>                                     >>>> could
>>>>>>                                     >>>>> not delete change
>>>>>>                                     record 3292734 (rc: 51)
>>>>>>                                     >>>>>
>>>>>>                                     >>>>>
>>>>>>                                     >>>>> Can  i do something
>>>>>>                                     about this error.. I treid to
>>>>>>                                     restart ipa a couple
>>>>>>                                     >>>> of
>>>>>>                                     >>>>> time but that did not help
>>>>>>                                     >>>>>
>>>>>>                                     >>>>> Thanks
>>>>>>                                     >>>>> Rakesh
>>>>>>                                     >>>>>
>>>>>>                                     >>>>> On Mon, Aug 22, 2016 at
>>>>>>                                     2:27 PM, Petr Spacek
>>>>>>                                     <pspacek at redhat.com
>>>>>>                                     <mailto:pspacek at redhat.com>>
>>>>>>                                     >>>> wrote:
>>>>>>                                     >>>>>
>>>>>>                                     >>>>>> On 19.8.2016 19:32,
>>>>>>                                     Rakesh Rajasekharan wrote:
>>>>>>                                     >>>>>>> I am running my set
>>>>>>                                     up on AWS cloud, and entropy
>>>>>>                                     is low at around
>>>>>>                                     >>>> 180 .
>>>>>>                                     >>>>>>>
>>>>>>                                     >>>>>>> I plan to increase it
>>>>>>                                     bu installing haveged . But,
>>>>>>                                     would low entropy
>>>>>>                                     >>>> by
>>>>>>                                     >>>>>> any
>>>>>>                                     >>>>>>> chance cause this
>>>>>>                                     issue of intermittent hang .
>>>>>>                                     >>>>>>> Also, the hang is
>>>>>>                                     mostly observed when
>>>>>>                                     registering around 20 clients
>>>>>>                                     >>>>>>> together
>>>>>>                                     >>>>>>
>>>>>>                                     >>>>>> Possibly, I'm not
>>>>>>                                     sure. If you want to dig into
>>>>>>                                     this, I would do this:
>>>>>>                                     >>>>>> 1. look what process
>>>>>>                                     hangs on client (using pstree
>>>>>>                                     command or so)
>>>>>>                                     >>>>>> $ pstree
>>>>>>                                     >>>>>>
>>>>>>                                     >>>>>> 2. look to what server
>>>>>>                                     and port is the hanging
>>>>>>                                     client connected to
>>>>>>                                     >>>>>> $ lsof -p <PID of the
>>>>>>                                     hanging process>
>>>>>>                                     >>>>>>
>>>>>>                                     >>>>>> 3. jump to server and
>>>>>>                                     see what process is bound to
>>>>>>                                     the target port
>>>>>>                                     >>>>>> $ netstat -pn
>>>>>>                                     >>>>>>
>>>>>>                                     >>>>>> 4. see where the
>>>>>>                                     process if hanging
>>>>>>                                     >>>>>> $ strace -p <PID of
>>>>>>                                     the hanging process>
>>>>>>                                     >>>>>>
>>>>>>                                     >>>>>> I hope it helps.
>>>>>>                                     >>>>>>
>>>>>>                                     >>>>>> Petr^2 Spacek
>>>>>>                                     >>>>>>
>>>>>>                                     >>>>>>> On Fri, Aug 19, 2016
>>>>>>                                     at 7:24 PM, Rakesh Rajasekharan <
>>>>>>                                     >>>>>>>
>>>>>>                                     rakesh.rajasekharan at gmail.com
>>>>>>                                     <mailto:rakesh.rajasekharan at gmail.com>>
>>>>>>                                     wrote:
>>>>>>                                     >>>>>>>
>>>>>>                                     >>>>>>>> yes there seems to
>>>>>>                                     be something thats worrying..
>>>>>>                                     I have faced this
>>>>>>                                     >>>> today
>>>>>>                                     >>>>>>>> as well.
>>>>>>                                     >>>>>>>> There are few hosts
>>>>>>                                     around 280 odd left and when
>>>>>>                                     i try adding them
>>>>>>                                     >>>> to
>>>>>>                                     >>>>>> IPA
>>>>>>                                     >>>>>>>> , the slowness begins..
>>>>>>                                     >>>>>>>>
>>>>>>                                     >>>>>>>> all the ipa commands
>>>>>>                                     like ipa user-find.. etc
>>>>>>                                     becomes very slow in
>>>>>>                                     >>>>>>>> responding.
>>>>>>                                     >>>>>>>>
>>>>>>                                     >>>>>>>> the SYNC_RECV are
>>>>>>                                     not many though just around
>>>>>>                                     80-90 and today that
>>>>>>                                     >>>> was
>>>>>>                                     >>>>>>>> around 20 only
>>>>>>                                     >>>>>>>>
>>>>>>                                     >>>>>>>>
>>>>>>                                     >>>>>>>> I have for now
>>>>>>                                     increased tcp_max_syn_backlog
>>>>>>                                     to 5000.
>>>>>>                                     >>>>>>>> For now the slowness
>>>>>>                                     seems to have gone.. but I
>>>>>>                                     will do a try
>>>>>>                                     >>>> adding the
>>>>>>                                     >>>>>>>> clients again
>>>>>>                                     tomorrow and see how it goes
>>>>>>                                     >>>>>>>>
>>>>>>                                     >>>>>>>> Thanks
>>>>>>                                     >>>>>>>> Rakesh
>>>>>>                                     >>>>>>>>
>>>>>>                                     >>>>>>>> The issues
>>>>>>                                     >>>>>>>>
>>>>>>                                     >>>>>>>> On Fri, Aug 19, 2016
>>>>>>                                     at 12:58 PM, Petr Spacek
>>>>>>                                     <pspacek at redhat.com
>>>>>>                                     <mailto:pspacek at redhat.com>>
>>>>>>                                     >>>>>> wrote:
>>>>>>                                     >>>>>>>>
>>>>>>                                     >>>>>>>>> On 18.8.2016 17:23,
>>>>>>                                     Rakesh Rajasekharan wrote:
>>>>>>                                     >>>>>>>>>> Hi
>>>>>>                                     >>>>>>>>>>
>>>>>>                                     >>>>>>>>>> I am migrating to
>>>>>>                                     freeipa from openldap and
>>>>>>                                     have around 4000
>>>>>>                                     >>>> clients
>>>>>>                                     >>>>>>>>>>
>>>>>>                                     >>>>>>>>>> I had openned a
>>>>>>                                     another thread on that, but
>>>>>>                                     chose to start a new
>>>>>>                                     >>>> one
>>>>>>                                     >>>>>>>>> here
>>>>>>                                     >>>>>>>>>> as its a separate
>>>>>>                                     issue
>>>>>>                                     >>>>>>>>>>
>>>>>>                                     >>>>>>>>>> I was able to
>>>>>>                                     change the
>>>>>>                                     nssslapd-maxdescriptors
>>>>>>                                     adding an ldif
>>>>>>                                     >>>> file
>>>>>>                                     >>>>>>>>>>
>>>>>>                                     >>>>>>>>>> cat
>>>>>>                                     nsslapd-modify.ldif
>>>>>>                                     >>>>>>>>>> dn: cn=config
>>>>>>                                     >>>>>>>>>> changetype: modify
>>>>>>                                     >>>>>>>>>> replace:
>>>>>>                                     nsslapd-maxdescriptors
>>>>>>                                     >>>>>>>>>>
>>>>>>                                     nsslapd-maxdescriptors: 17000
>>>>>>                                     >>>>>>>>>>
>>>>>>                                     >>>>>>>>>> and running the
>>>>>>                                     ldapmodify command
>>>>>>                                     >>>>>>>>>>
>>>>>>                                     >>>>>>>>>> I have now started
>>>>>>                                     moving clients running an
>>>>>>                                     openldap to Freeipa
>>>>>>                                     >>>> and
>>>>>>                                     >>>>>>>>> have
>>>>>>                                     >>>>>>>>>> today moved close
>>>>>>                                     to 2000 clients
>>>>>>                                     >>>>>>>>>>
>>>>>>                                     >>>>>>>>>> However, I have
>>>>>>                                     noticed that IPA hangs
>>>>>>                                     intermittently.
>>>>>>                                     >>>>>>>>>>
>>>>>>                                     >>>>>>>>>> running a kinit
>>>>>>                                     admin returns the below error
>>>>>>                                     >>>>>>>>>> kinit: Generic
>>>>>>                                     error (see e-text) while
>>>>>>                                     getting initial
>>>>>>                                     >>>> credentials
>>>>>>                                     >>>>>>>>>>
>>>>>>                                     >>>>>>>>>> from the
>>>>>>                                     /var/log/messages, I see this
>>>>>>                                     entry
>>>>>>                                     >>>>>>>>>>
>>>>>>                                     >>>>>>>>>>
>>>>>>                                     prod-ipa-master-int kernel:
>>>>>>                                     [104090.315801] TCP:
>>>>>>                                     >>>> request_sock_TCP:
>>>>>>                                     >>>>>>>>>> Possible SYN
>>>>>>                                     flooding on port 88. Sending
>>>>>>                                     cookies. Check SNMP
>>>>>>                                     >>>>>> counters.
>>>>>>                                     >>>>>>>>>
>>>>>>                                     >>>>>>>>> I would be worried
>>>>>>                                     about this message. Maybe
>>>>>>                                     kernel/firewall is
>>>>>>                                     >>>> doing
>>>>>>                                     >>>>>>>>> something fishy
>>>>>>                                     behind your back and blocking
>>>>>>                                     some connections or
>>>>>>                                     >>>> so.
>>>>>>                                     >>>>>>>>>
>>>>>>                                     >>>>>>>>> Petr^2 Spacek
>>>>>>                                     >>>>>>>>>
>>>>>>                                     >>>>>>>>>
>>>>>>                                     >>>>>>>>>> Aug 18 13:00:01
>>>>>>                                     prod-ipa-master-int
>>>>>>                                     systemd[1]: Started Session
>>>>>>                                     >>>> 4885
>>>>>>                                     >>>>>> of
>>>>>>                                     >>>>>>>>>> user root.
>>>>>>                                     >>>>>>>>>> Aug 18 13:00:01
>>>>>>                                     prod-ipa-master-int
>>>>>>                                     systemd[1]: Starting Session
>>>>>>                                     >>>> 4885
>>>>>>                                     >>>>>> of
>>>>>>                                     >>>>>>>>>> user root.
>>>>>>                                     >>>>>>>>>> Aug 18 13:01:01
>>>>>>                                     prod-ipa-master-int
>>>>>>                                     systemd[1]: Started Session
>>>>>>                                     >>>> 4886
>>>>>>                                     >>>>>> of
>>>>>>                                     >>>>>>>>>> user root.
>>>>>>                                     >>>>>>>>>> Aug 18 13:01:01
>>>>>>                                     prod-ipa-master-int
>>>>>>                                     systemd[1]: Starting Session
>>>>>>                                     >>>> 4886
>>>>>>                                     >>>>>> of
>>>>>>                                     >>>>>>>>>> user root.
>>>>>>                                     >>>>>>>>>> Aug 18 13:02:40
>>>>>>                                     prod-ipa-master-int
>>>>>>                                     python[28984]: ansible-command
>>>>>>                                     >>>>>>>>> Invoked
>>>>>>                                     >>>>>>>>>> with creates=None
>>>>>>                                     executable=None shell=True
>>>>>>                                     args= removes=None
>>>>>>                                     >>>>>>>>> warn=True
>>>>>>                                     >>>>>>>>>> chdir=None
>>>>>>                                     >>>>>>>>>> Aug 18 13:04:37
>>>>>>                                     prod-ipa-master-int sssd_be:
>>>>>>                                     GSSAPI Error:
>>>>>>                                     >>>> Unspecified
>>>>>>                                     >>>>>>>>> GSS
>>>>>>                                     >>>>>>>>>> failure. Minor
>>>>>>                                     code may provide more
>>>>>>                                     information (KDC returned
>>>>>>                                     >>>> error
>>>>>>                                     >>>>>>>>>> string: PROCESS_TGS)
>>>>>>                                     >>>>>>>>>>
>>>>>>                                     >>>>>>>>>> Could it be
>>>>>>                                     possible that its due to the
>>>>>>                                     initial load of adding
>>>>>>                                     >>>> the
>>>>>>                                     >>>>>>>>> clients
>>>>>>                                     >>>>>>>>>> or is there
>>>>>>                                     something else that I need to
>>>>>>                                     take care of.
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>                     --
>>>                     Manage your subscription for the Freeipa-users
>>>                     mailing list:
>>>                     https://www.redhat.com/mailman/listinfo/freeipa-users
>>>                     <https://www.redhat.com/mailman/listinfo/freeipa-users>
>>>                     Go to http://freeipa.org for more info on the
>>>                     project
>>>
>>>
>>>
>>>
>>>
>>
>>
>
>
>

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