Diagnostic Server showing the following error:
"Playback error [Read error]: Reading the playback database failed: creating a history cursor on playback failed: the query has timed out. [HY008]"
"Playback error [Connection Error]: connecting to the instance sql-spotlight as the Diagnostic Server user failed : Another Diagnostic Server is using this Spotlight playback database."
Running SP_WHO2 shows only one Diagnostic Server.