Hi ,
Considering a time period from 08:00 AM to 09:00 AM . In this time frame, in error logs we see similar unindexed searches(please see sample below) and slapd_poll timed out errors
From 08:00 to 08: 12 there were unindexed searches in the error logs
From 08:12 to 08:45 there were no records in error logs and access logs.
08:45 -08:48 unindexed searches in the error logs
08:49 -09:03 - slapd_poll timed out errors.
13/Nov/2020:08:12:19 -0500] - WARNING<20805> - Backend Database - conn=-1 op=0 msgId=-1 - search is not indexed base='cn=changelog' filter='(&(0=uid=**,ou=people,dc=xxx,dc=com)(|(objectclass=*)(objectclass=ldapsubentry)))' scope='sub'
[13/Nov/2020:08:47:17 -0500] - WARNING<20805> - Backend Database - conn=-1 op=0 msgId=-1 - search is not indexed base='dc=com' filter='(&(0=uid=xxx,ou=people,dc=xxxx,dc=com)(|(objectclass=*)(objectclass=ldapsubentry)))' scope='sub'
[13/Nov/2020:08:50:41 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(513) timed out
[13/Nov/2020:08:50:50 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(533) timed out
[13/Nov/2020:08:50:57 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(551) timed out
[13/Nov/2020:08:51:10 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(576) timed out
[13/Nov/2020:08:51:16 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(591) timed out
[13/Nov/2020:08:51:25 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(611) timed out
[13/Nov/2020:08:51:34 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(632) timed out
[13/Nov/2020:08:51:41 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(652) timed out
[13/Nov/2020:08:51:53 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(675) timed out
[13/Nov/2020:08:51:58 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(691) timed out
[13/Nov/2020:08:52:09 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(712) timed out
[13/Nov/2020:08:52:16 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(733) timed out
[13/Nov/2020:08:52:26 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(755) timed out
[13/Nov/2020:08:52:36 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(778) timed out
[13/Nov/2020:08:52:42 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(793) timed out
[13/Nov/2020:08:52:53 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(812) timed out
[13/Nov/2020:08:52:57 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(832) timed out
[13/Nov/2020:08:53:10 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(855) timed out
[13/Nov/2020:08:53:19 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(878) timed out
[13/Nov/2020:09:00:45 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(1933) timed out
[13/Nov/2020:09:00:49 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(1943) timed out
[13/Nov/2020:09:00:55 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(1956) timed out
[13/Nov/2020:09:01:04 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(1974) timed out
[13/Nov/2020:09:01:11 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(1993) timed out
[13/Nov/2020:09:01:19 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(2015) timed out
[13/Nov/2020:09:01:28 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(2034) timed out
[13/Nov/2020:09:01:40 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(2057) timed out
[13/Nov/2020:09:01:48 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(2076) timed out
[13/Nov/2020:09:01:55 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(2095) timed out
[13/Nov/2020:09:02:04 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(2117) timed out
[13/Nov/2020:09:02:12 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(2137) timed out
[13/Nov/2020:09:02:22 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(2159) timed out
[13/Nov/2020:09:02:29 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(2178) timed out
[13/Nov/2020:09:02:39 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(2196) timed out
[13/Nov/2020:09:02:46 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(2218) timed out
[13/Nov/2020:09:02:56 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(2238) timed out
[13/Nov/2020:09:03:04 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(2260) timed out
[13/Nov/2020:09:03:12 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(2279) timed out
[13/Nov/2020:09:03:22 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(2299) timed out
[13/Nov/2020:09:03:30 -0500] - DEBUG - conn=-1 op=-1 msgId=-1 - slapd_poll(2322) timed out
[13/Nov/2020:09:03:33 -0500] - Preparing for shutdown.
Looking at the access logs ,these unindexed queries are triggered after a delete of user id happens. We are trying to figure out the reason for this unindexed search . Unable to track the user ID triggering it in the access logs.Looks like the query will not return valid search results as well.
Running the Ldapsearch around 08:50 AM did not work and at 09:03 AM we stopped the instance and then started it back again.This fixed the issue.
We trying to figure out the reason for server not responding in this time frame. Could you please let us know if the server was not responding due to the below reasons ? Thanks.
Unindexed queries
slapd_poll timed out errors
Could you please let us know the reason & fix for this ? Thanks.