Werk #15861: Discovery page: Show true reason of a failed discovery

Component	Setup
Title	Discovery page: Show true reason of a failed discovery
Date	Jun 28, 2023
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.3.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT 2.2.0p5 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT

The discovery page reports the success or failure of a datasource since Checkmk 2.2. However if a datasource failed the page most of the times only reported "No cached data available". While this is correct, it gives little information about the underlying problem. Now the actual error message is show.

To the list of all Werks