Werk #19196: rrd: Skip RRD creation for filenames exceeding filesystem limits

Component

Core & setup

Title

rrd: Skip RRD creation for filenames exceeding filesystem limits

Date

Apr 17, 2026

Level

Trivial Change

Class

Bug Fix

Compatibility

Compatible - no manual interaction needed

Checkmk versions & editions

2.5.0b5 Not yet released	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT
2.4.0p27 Not yet released	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

Nagios core now skips RRD file creation when the generated filename would exceed the filesystem PC_NAME_MAX limit. This can happen with services that have long descriptions or metric names.

Previously, attempting to create such files could cause silent failures or crashes in the GUI. The affected service is now skipped with a log warning instead, keeping the monitoring core stable.

No action from the user is required.

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