On 9/17/21 12:26 AM, Kathy Zhu via FreeIPA-users wrote:
Hi Mark,
If it helps, this is the same ipa server which I posted in subject
"ipa_check_consistency alerts and ERR - slapd_poll - Timed out"
yesterday.
Hi Kathy,
The slapd_poll message is likely not related to the DB_PANIC. Slap_poll
here means that the server was not able to send a result (ldap client
not reading ?) for longer than ioblock-timeout.
The DB panic is a fatal error of the database that requires a restart of
the server. The restart will trigger a DB recovery. It is difficult to
know the RC of the DB panic. According to the initial message DB was
running a deadlock resolution during DB panic, you may try to give
priority to updates (setting nsslapd-db-deadlock-policy: 6) that can
significantly reduces db deadlocks.
regards
thierry
Thanks.
Kathy.
On Thu, Sep 16, 2021 at 2:57 PM Kathy Zhu wrote:
Thanks, Mark, for your reply.
The following repeats in /var/log/dirsrv/slapd-EXAMPLE-COM/errors:
...
[16/Sep/2021:08:34:27.880349688 -0700] - CRIT -
deadlock_threadmain - Serious Error---Failed in deadlock detect
(aborted at 0x0), err=-30973 (BDB0087 DB_RUNRECOVERY: Fatal error,
run database recovery)
[16/Sep/2021:08:34:27.980810867 -0700] - ERR - libdb - BDB0060
PANIC: fatal region error detected; run recovery
[16/Sep/2021:08:34:27.981036823 -0700] - CRIT -
deadlock_threadmain - Serious Error---Failed in deadlock detect
(aborted at 0x0), err=-30973 (BDB0087 DB_RUNRECOVERY: Fatal error,
run database recovery)
[16/Sep/2021:08:34:28.031642976 -0700] - ERR - libdb - BDB0060
PANIC: fatal region error detected; run recovery
[16/Sep/2021:08:34:28.031856673 -0700] - ERR - trickle_threadmain
- Serious Error---Failed to trickle, err=-30973 (BDB0087
DB_RUNRECOVERY: Fatal error, run database recovery)
[16/Sep/2021:08:34:28.081390783 -0700] - ERR - libdb - BDB0060
PANIC: fatal region error detected; run recovery
[16/Sep/2021:08:34:28.081634618 -0700] - CRIT -
deadlock_threadmain - Serious Error---Failed in deadlock detect
(aborted at 0x0), err=-30973 (BDB0087 DB_RUNRECOVERY: Fatal error,
run database recovery)
[16/Sep/2021:08:34:28.181946001 -0700] - ERR - libdb - BDB0060
PANIC: fatal region error detected; run recovery
[16/Sep/2021:08:34:28.182160603 -0700] - CRIT -
deadlock_threadmain - Serious Error---Failed in deadlock detect
(aborted at 0x0), err=-30973 (BDB0087 DB_RUNRECOVERY: Fatal error,
run database recovery)
[16/Sep/2021:08:34:28.282366716 -0700] - ERR - libdb - BDB0060
PANIC: fatal region error detected; run recovery
[16/Sep/2021:08:34:28.282650113 -0700] - ERR - trickle_threadmain
- Serious Error---Failed to trickle, err=-30973 (BDB0087
DB_RUNRECOVERY: Fatal error, run database recovery)
[16/Sep/2021:08:34:28.283083329 -0700] - ERR - libdb - BDB0060
PANIC: fatal region error detected; run recovery
...
Thanks!
Kathy.
On Thu, Sep 16, 2021 at 2:38 PM Mark Reynolds
<[email protected] <mailto:[email protected]>> wrote:
On 9/16/21 5:20 PM, Kathy Zhu via FreeIPA-users wrote:
Hi List,
One of my ipa server's database had issue and left many log
entries like the following in messages and slapd errors log:
*Sep 16 08*:34:28 ipa0 ns-slapd:
[16/Sep/2021:08:34:28.886632992 -0700] - ERR - libdb -
BDB0060 PANIC: fatal region error detected; run recovery
*Sep 16 08*:34:29 ipa0 ns-slapd:
[16/Sep/2021:08:34:28.987593487 -0700] - ERR - libdb -
BDB0060 PANIC: fatal region error detected; run recovery
*Sep 16 08*:34:29 ipa0 ns-slapd:
[16/Sep/2021:08:34:29.035181321 -0700] - ERR - libdb -
BDB0060 PANIC: fatal region error detected; run recovery
Is there anything else in the error log around these
messages? This is kind of a generic error, and increasing the
DN cache is not a guarantee it will resolve this.
Restart ipa fixed the issue. I googled for root cause and
found the verified solution -
https://access.redhat.com/solutions/3098131
<https://access.redhat.com/solutions/3098131>, which is to
increase nsslapd-dncachememsize to a reasonable value
(>150MB). This sounds like easy, however, all slapd cache
parameters are related. Red Hat Directory Server performance
tuning guide explain a bit:
https://access.redhat.com/documentation/en-us/red_hat_directory_server/10/html/performance_tuning_guide/memoryusage
<https://access.redhat.com/documentation/en-us/red_hat_directory_server/10/html/performance_tuning_guide/memoryusage>
However, I wonder if there is a better guide.
Not really :-) There is a RHDS 11 version, but I think the
performance tuning part is the same as RHDS 10.
Mark
Thanks.
Kathy.
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