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Werk #19585: Fixed various edge cases of the availability calculation

Component Livestatus
Title Fixed various edge cases of the availability calculation
Date Mar 27, 2026
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed
Checkmk versions & editions
2.6.0b1
Not yet released
Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT
2.5.0b3
Not yet released
Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT
2.4.0p26
Not yet released
Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT

The availability calculation did not handle various edge cases correctly, most prominently the handling of nested and/or overlapping downtimes. Other edge cases were related to core restarts and rotations of the monitoring log. The most visible symptoms were downtime phases in the availability timeline which ended too early or never. All of this has been fixed.

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