Werk #22548: APC Symmetra: no crash without UPS data

Component

Checks & agents

Title

APC Symmetra: no crash without UPS data

Date

Oct 5, 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
2.5.0p16 Not yet released	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

If an APC UPS stopped reporting its battery data while its external temperature sensors still delivered values, the "APC Symmetra status" service crashed with KeyError: 'status'.

The service now goes to UNKNOWN with "Item not found in monitoring data" for as long as the battery data is missing, as it already did in Checkmk 2.4.0. The temperature services keep working.

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