Werk #22426: Redfish: discovery no longer crashes on numeric resource IDs

Component	Checks & agents
Title	Redfish: discovery no longer crashes on numeric resource IDs
Date	Sep 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 2.5.0p16 Not yet released Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT 2.4.0p38 Not yet released Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

Some Redfish devices, for example certain rack PDUs, report the ID of a resource as a number instead of text. On such hosts the Check_MK Discovery service crashed with TypeError: 'item' must be a non empty string or ommited entirely, got 1, and the resource was not discovered.

These resources are now discovered and monitored as usual, e.g. a PDU with the ID 1 as PDU 1. Run a service discovery on affected hosts to add them.

To the list of all Werks