L_DUMPING: PTR(6:0xffac150): end_req (1315): Mount points failures [M.point:ou=users,dc=domain,dc=local Error:1 Msg:Backend failed in middle of search result (search not retried)]
L_WARNING: PTR(6:0xffac150): end_req (1321): One or more mount point searches returned an error. Returning PARTIAL_RESULT error.
The client application could be mis-interpreting this PARTIAL_RESULT error causing the virtual tree to become unresponsive.
If only a sub-search, a branch of the VT, generates an error. In the sub-search to the Datasource with all their servers DOWN, the result is a Backend Failed error which is propagated as a PARTIAL_RESULT error: