[Freeipa-users] Freeipa 4.2.0 hangs intermittently

[Rakesh Rajasekharan]

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> 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>
> wrote:
>
>>
>>
>> On 08/25/2016 10:15 AM, Rakesh Rajasekharan wrote:
>>
>> All of the troubleshooting seems fine.
>>
>>
>> However, Running 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> 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
>>> >
>>> > Valid starting       Expires              Service principal
>>> > 2016-08-23T16:26:36  2016-08-24T16:26:22  krbtgt/ <XYZ.COM at XYZ.COM>
>>> 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'", -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> 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> 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>
>>> 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>
>>> >>>> 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> 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>
>>> >>>>>> 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.
>>>
>>
>>
>>
>>
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listman.redhat.com/archives/freeipa-users/attachments/20160829/a4e1f094/attachment.htm>