Problem:
Notifier not running and univention_replication is critical
During import the notifier is normally turned of.
If the import takes to long, some checks like nagios show univention_replication critical.
Solution:
Do not start the notifier during import, just wait, until the import has finished.
You may optimizes your import procedure.
If the notifier is not running after the import automatically, this is not the appropriate article.