[Bucardo-general] add sync fails due to deadlock
Michael Betts
mike at freshsqueezedwebsites.com
Sun Mar 24 00:09:57 UTC 2013
Greg,
Here's what gets reported back by bucardo:
DETAIL: Process 8575 waits for AccessExclusiveLock on relation 17353 of database 16386; blocked by process 8584.
Process 8584 waits for AccessShareLock on relation 27332 of database 16386; blocked by process 8575.
And here's what's in the source log file:
2013-03-23 23:50:41 UTC ERROR: deadlock detected
2013-03-23 23:50:41 UTC DETAIL: Process 8575 waits for AccessExclusiveLock on relation 17353 of database 16386; blocked by process 8584.
Process 8584 waits for AccessShareLock on relation 27332 of database 16386; blocked by process 8575.
Process 8575: CREATE TRIGGER "bucardo_note_trunc_radsync"
AFTER TRUNCATE ON "public"."auth_user"
FOR EACH STATEMENT EXECUTE PROCEDURE bucardo.bucardo_note_truncation('radsync')
Process 8584: SELECT "album"."id", "album"."artist_id", "album"."title", "album"."duration", "album"."parental_advisory", "album"."release_date", "album"."cover_art", "album"."single_album", "album"."created_date", "album"."last_updated_date" FROM "album" WHERE "album"."id" = 11175457
So it looks like trying to create the trigger on auth_user fails because of a share lock on album, which makes no sense to me as they are not related. And it's not just this table, if I remove the auth_user table from the sync, I get a similar error on other tables.
Is there a way to not specify the truncate triggers?
Thanks,
Mike
On Mar 23, 2013, at 7:49 PM, Greg Sabino Mullane wrote:
>> the validate_sync fails due to a deadlock when trying to create a
>> trigger on one of the tables. Is there a way to add a sync to a live
>> database so this won't occur? Any advice would be much appreciated.
>
> Exactly what is it deadlocking against? It always needs to get an exclusive lock
> on each table in the sync to create the triggers, so there is always
> a chance of bumping into other processes. Depending on what it is, though,
> there may be ways to fix the issue.
>
> --
> Greg Sabino Mullane greg at endpoint.com
> End Point Corporation
> PGP Key: 0x14964AC8
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