Public bug reported:
We had an incident where rabbitmq-server would stop accepting
connections, with the following message in the log:
=WARNING REPORT==== 24-Nov-2020::09:46:02 ===
file descriptor limit alarm set.
********************************************************************
*** New connections will not be accepted until this alarm clears ***
********************************************************************
However, when checking the fd limits these are set quite high:
root@juju-efcc41-12-lxd-0:~# cat /etc/default/rabbitmq-server
# Generated by juju
# bump ulimit so rabbit can support lots of connections
ulimit -n 65536
root@juju-efcc41-12-lxd-0:~# grep Limit
/lib/systemd/system/rabbitmq-server.service
LimitNOFILE=65536
On the other hand, checking fd usage via lsof, `lsof -u rabbitmq` would
only report abt. 900 open fds
After bouncing rabbitmq it resumed accepting connects
Versions:
rabbitmq-server 3.5.7-1ubuntu0.16.04.2
Ubuntu 16.04.5 LTS
** Affects: rabbitmq-server (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1905423
Title:
Rabbit reports "file descriptor limit alarm set", does not accept
connections
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