Werk #22742: logwatch: don't crash if the worst message is an empty line

Component	Checks & agents
Title	logwatch: don't crash if the worst message is an empty line
Date	Oct 15, 2026
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	3.0.0b1 Not yet released Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT 2.5.0p18 Not yet released Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT 2.4.0p39 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

A Log service crashed with ValueError: 'summary' must be non-empty str or None, got '' if the most severe message of the log file was an empty line, for example when a pattern classified an empty line as WARN or CRIT.

The service now shows the number of messages per state as summary, e.g. 1 WARN messages.

To the list of all Werks