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Werk #22495: Redfish: an unavailable chassis no longer turns Check_MK CRIT

Component Checks & agents
Title Redfish: an unavailable chassis no longer turns Check_MK CRIT
Date Oct 29, 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

Since Werk #22290, the Check_MK service of Redfish hosts could go CRIT with an error like /redfish/v1/Chassis/2 is temporarily unavailable. This happened whenever one of several chassis of a device was not ready to answer, which HPE iLO 5, for example, reports intermittently. On some devices, such as HPE iLO 4, Cisco CIMC or Supermicro, the same could happen for a management controller.

The agent now ignores such a chassis or controller in that check cycle and monitors the rest as usual. If none of them can answer, the Check_MK service still goes CRIT.

Werk 22290 also caused services to lose their data for a check cycle if a part of the device, such as a chassis, a system or a storage controller, could not be queried. These services now keep their last known data for up to five minutes, provided the Check_MK service runs at least that often.

The Firmware health service no longer reports "All firmware in optimal state" if the firmware data could not be queried.

To the list of all Werks