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Date:      Fri, 27 Dec 2019 09:10:20 -0800
From:      Lee Damon <nomad@castle.org>
To:        freebsd-stable@freebsd.org
Subject:   ldapsearch stops working after ~4-12 hours (one host of 4)
Message-ID:  <23f18d16-7f86-8e94-8cd5-9bed61ea3405@castle.org>

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I have four hosts all running 11.3-RELEASE-p5 on the same subnet.

Yesterday I did the usual "freebsd-update fetch && freebsd-update
install" on all four. They came back up fine but about 4 hours later one
of them started reporting problems with ldap search. I poked at it a bit
but it was struggling to do anything so I had to reboot it. It came back
up clean but the problem resurfaced early this morning.

from /var/log/messages:

Dec 27 03:30:00 [redacted] root: 3:30AM up 11:16, 1 user, load averages:
0.04, 0.07, 0.08
Dec 27 03:35:00 [redacted] root: 3:35AM up 11:21, 1 user, load averages:
0.21, 0.23, 0.15
Dec 27 03:35:10 [redacted] chgrp: nss_ldap: could not search LDAP server
- Server is unavailable
Dec 27 03:35:12 [redacted] top: nss_ldap: could not search LDAP server -
Server is unavailable
Dec 27 03:35:35 [redacted] nrpe[76163]: nss_ldap: could not search LDAP
server - Server is unavailable

Both times I observed this:

: ldapsearch -v -LLL -x -h [redacted].ee.washington.edu -b
dc=ee,dc=washington,dc=edu uid=[redacted]
ldap_initialize( ldap://[redacted].ee.washington.edu )
ldap_sasl_bind(SIMPLE): Can't contact LDAP server (-1)

The other hosts on the same subnet have no such problems.

I re-ran fetch & update but it said there was nothing to do.

Any hints where I should start poking this?

thanks,
nomad



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