CMK version: 2.4.0.cce OS version: Debian 12 Hello, since the 2.40 upgrade the service Check_MK Discovery has state UNKN on every docker server. crash.info.txt (2.0 KB) [grafik] The problem exists on agents with version 2.3 and version 2.4 Thanks for your help! Best regards Chris

I have written a patch. It should become available with the next patch release.

Hey, I have got the same issue. I have installed every beta update in 2.4 branch and it worked until the end. So it has to be a werk in the final release. Additionally this issue only exists at snmp hosts with special settings for periodic service discovery (default is working). After deleting my …