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Werk #19180: Fix schedule downtime error in "All aggregations" view

Component BI
Title Fix schedule downtime error in "All aggregations" view
Date Jan 19, 2026
Level Prominent Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed
Checkmk versions & editions
2.6.0b1
Not yet released
Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.5.0b1
Not yet released
Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.4.0p20 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.3.0p43
Not yet released
Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

At some point during the development of the 2.3 release, the schedule downtime command in the Business Intelligence component became broken. Triggering a downtime would raise a KeyError, stating that the host_name key was not found.

This key is indeed the correct key for the "Hosts" and "Services" views, but not for the "All aggregations" view in BI. For this view, the host values need to be extracted from the aggr_hosts key.

The applied fix now detects the source of the schedule downtime request and uses the appropriate key accordingly. After upgrading to the next patch release, scheduling downtime works correctly in the "All aggregations" view without any further user intervention.

Note: you may notice in the confirmation dialog that it refers to "Hosts" and not "Aggregations". This is a known bug which we will investigate in a follow-up task. The goal of this change is to simply get the schedule downtime command working again from the "All aggregations" view.

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