Re: Patch for LISTEN/NOTIFY race condition?

Thanks all ... I'm going to do some more digging and see if I can
isolate the problem.

Meetesh

Tom Lane wrote:
> Alvaro Herrera <alvherre@commandprompt.com> writes:
>
>> Meetesh Karia wrote:
>>
>>> After upgrading to 8.3 and Slony 1.2.13, one of our import processes
>>> started constantly failing because of deadlock.  Our import process
>>> (pl/pgsql function) just uses COPY FROM to populate a temp table and
>>> then inserts from that (without any special locks, etc).  And, the
>>> deadlock error showed that the import process was waiting on sl_event
>>> and a slon process was waiting on pg_listener.
>>>
>>> I found the following thread in the archives:
>>> http://archives.postgresql.org/pgsql-bugs/2008-03/msg00117.php and it
>>> seemed like it could be the cause of the problem.
>>>
>>> Is the patch available anywhere?  Also, if it will be available in
>>> 8.3.2, is there any information on when that will be released?
>>>
>
>
>> Hmm, AFAICS the patch should be present on 8.3.1, because it was tagged
>> on March 14th and the patch was committed on March 12.
>>
>
> Yes, but in any case (a) that's about a race condition not a deadlock,
> and (b) the issue has been there since forever, so it is unlikely to
> explain or fix a problem that you weren't seeing before 8.3.
>
>             regards, tom lane
>