Re: ERROR: canceling query due to user request

From: "Kevin Grittner" <Kevin(dot)Grittner(at)wicourts(dot)gov>
To: <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: <pgsql-admin(at)postgresql(dot)org>
Subject: Re: ERROR: canceling query due to user request
Date: 2005-09-13 14:51:44
Message-ID: s326a13a.055@gwmta.wicourts.gov
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One more thought -- I keep coming back to the fact that when we turn on logging in the JDBC driver on the client side, the problem does not occur. The only possible reason I can see for this having any affect on the problem is the small delay introduced by the synchronous logging. Since this is only showing up on commit of a database transaction which follows close on the heels of a rollback on the same connection, is there any chance that there is some very small "settling time" needed for a rollback, and we're sometimes getting in ahead of this?

-Kevin


>>> Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> 09/12/05 5:39 PM >>>
"Kevin Grittner" <Kevin(dot)Grittner(at)wicourts(dot)gov> writes:
> org.postgresql.util.PSQLException: ERROR: canceling query due to user request

The only possible trigger of that message is a SIGINT sent to the backend.
Now the backend will SIGINT itself if a statement timeout expires, so one
possibility is that you have statement_timeout set and it's getting
exceeded. Otherwise you need to be looking for external causes.

regards, tom lane

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