Problem: Listener Issues


The listener seems not to be up and running. It appears to be out of sync. Nagios reports errors as follows:

CRITICAL    2018-12-04 09:49:20    0d 1h 10m 38s    5/5    CRITICAL: no change of listener transaction id for last 10 checks (nid=240976 lid=cat: /var/lib/univention-directory-listener/notifier_id: No such file or directory)


In /var/log/univention/listener.log you might see entries like this:

04.12.18 08:48:47.597 LISTENER ( ERROR ) : import of filename=/usr/lib/univention-directory-listener/system/ failed

You have configured an additional listener module which appears to fail for some reason so the listener does not start correctly.


Option 1

Remove your failing listener module and restart the listener:
systemctl start univention-directory-listener

Option 2

Perform troubleshooting why it fails.