If you're using Tomcat or some other Java container that does connection management restart it and the lock should go
away.
Bob Lunney
--- On Fri, 4/30/10, Kamcheung Sham <csham@computer.org> wrote:
> From: Kamcheung Sham <csham@computer.org>
> Subject: [ADMIN] Runaway Locks
> To: pgsql-admin@postgresql.org
> Date: Friday, April 30, 2010, 9:03 AM
>
> I was connecting to Postgres 8.3 through JDBC. During my
> unit tests, something when wrong and now leaving with the
> following locks in the db:
>
> arc_dev=# select locktype, mode, relname,
> virtualtransaction, pid from pg_locks l join pg_class c on
> l.relation = c.oid;
>
>
> locktype | mode
> |
> relname |
> virtualtransaction | pid
> ----------+------------------+----------------------------+--------------------+------
>
> relation | AccessShareLock | pg_locks
>
> | 1/38
> | 1816
> relation | RowShareLock |
> hibernate_sequences |
> -1/2091555 |
>
> relation | RowExclusiveLock | hibernate_sequences
> | -1/2091555
> |
> relation | AccessShareLock | pg_class_oid_index
> | 1/38
> | 1816
> relation | AccessShareLock |
> pg_class_relname_nsp_index | 1/38
> | 1816
> relation | AccessShareLock | pg_class
>
> | 1/38
> | 1816
> (6 rows)arc_dev=#
>
> The locks on 'hibernate_sequences' is causing any update to
> the locked row to hang. There is currently no running
> database client process anymore (as I've restarted by server
> a few times).
>
> My question is how do i kill the virtual transaction and
> have the locks released?
>
> Thanks,
> kam
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