This is what I get in ~20 out of ~2M SQL dependency AI registrations.
Apparently this result code does not appear in sys.messages, since all message id's in there are positive.
Also I can't seem to find any stack trace information on this error. It seems to be a timeout or general transient error (handled by Polly from my side), but either way it's registered under dependencies and not exceptions.
Does anybody know what this error is and where I can find more information regarding all possible SQL dependency errors I might get?
I have submitted this issue to app insights team here, and just get feedback:
-2 means Timeout expired. The timeout period elapsed prior to completion of the
operation or the server is not responding. (Microsoft SQL Server, Error: -2).
The Sql Exception number is here.
And if you have any concerns, please comment at that thread. Hope it helps.