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Werk #22190: Fix crash scheduling host downtime

Component User interface
Title Fix crash scheduling host downtime
Date Aug 18, 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
2.5.0p12 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

Scheduling a downtime for the hosts of the selected services crashed with KeyError: 'host_name' when the view the services were selected in did not show a host column.

The command now works from such a view as well. The number of affected hosts shown in the confirmation dialog can be lower than the real number in that case, because it is counted from the columns the view provides; the downtimes themselves are scheduled for all selected hosts as before.

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