Werk #16124: The alert handler master control has an immediate effect now in the CMC

Component	The Checkmk Micro Core
Title	The alert handler master control has an immediate effect now in the CMC
Date	Dec 17, 2024
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.4.0b1 Not yet released Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.3.0p24 Not yet released Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.2.0p38 Not yet released Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

Due to a regression in Checkmk 2.0, the master control switch for alert handlers only had an effect after activating changes or reloading/restarting the CMC. This fix restores the old immediate behavior. Note that users of the Nagios core were not affected.

Technically, the Livestatus commands ENABLE_ALERT_HANDLERS and DISABLE_ALERT_HANDLERS (which are used by the master control) did not have an immediate effect in the CMC, only after (re-)loading the CMC config.

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