After upgrade to 17.10.7 we experienced the nested pages of one sub-wiki were not seen.
and logs showed following lines
2026-05-22 15:48:28,902 [http-nio-8080-exec-86 - http://{domain}/wiki/bin/get/Dokumenty/{URI}/WebHome] WARN .n.ChildDocumentsTreeNodeGroup - Failed to retrieve the children of [document:xwiki:Dokumenty.WebHome]. Root cause [IllegalArgumentException: No query defined for that name [nestedPagesOrderedByTitleAsc]].
2026-05-22 15:48:36,954 [http-nio-8080-exec-102 - http://{domain}/wiki/bin/get/Dokumenty/{URI}/WebHome] WARN .n.ChildDocumentsTreeNodeGroup - Failed to retrieve the children of [wiki:xwiki]. Root cause [IllegalArgumentException: No query defined for that name [nonTerminalPagesOrderedByTitleAsc]].
restart of XWiki solved the issue at the time, but similar issue just happened again.
We run actual version 17.10.8 already and see the very similar issue:
What might went wrong or how to handle this sort of issues the best way?
Is there way to monitor XWiki as it is hard to went through all spaces to make us sure everything is ok after every maintenance.