Werk #19709: nimble_latency: Fix KeyError['total']

Component	Checks & agents
Title	nimble_latency: Fix KeyError['total']
Date	Jun 16, 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 2.5.0p8 Not yet released Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT 2.4.0p33 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

The check plugins nimble_latency and nimble_latency_write could crash with KeyError: 'total'.

Werk #7918 originally guarded against exactly this situation. But the protection was inadvertently lost in Werk #11330.

This only affected services that were enforced for volumes reporting no latency data. The service discovery never creates such services, so this could not happen for automatically discovered services.

These enforced services now become stale instead of crashing.

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