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From Andrus Adamchik <and...@objectstyle.org>
Subject Re: Deadlock in PoolManager
Date Tue, 23 Nov 2010 16:33:27 GMT
Interesting. I guess we haven't seen it before cause people don't call dispose that often.


Please open a Jira. 

Thanks,
Andrus

On Nov 23, 2010, at 5:54 PM, Laurent Marchal wrote:

> Hi all,
> 
>    I'm using cayenne 3.0 ans I'm experiencing a deadlock when I exit my application.
I call PoolManager.dispose() to disconnect all connections, but it seems if at the same time
a pooled connection is returned to the pool then it deadlocks.
> 
> Here is the deadlock as detected by the java console.
> 
> Thanks,
> Laurent Marchal.
> 
> Name: Worker-2
> State: BLOCKED on com.sma.core.net.OpconPoolManager@197871d owned by: main
> Total blocked: 327  Total waited: 475
> 
> Stack trace:
> org.apache.cayenne.conn.PoolManager.connectionClosed(PoolManager.java:438)
> org.apache.cayenne.conn.PooledConnectionImpl.connectionClosedNotification(PooledConnectionImpl.java:181)
>   - locked java.util.Collections$SynchronizedRandomAccessList@12a12fc
> org.apache.cayenne.conn.PooledConnectionImpl.returnConnectionToThePool(PooledConnectionImpl.java:146)
> org.apache.cayenne.conn.ConnectionWrapper.close(ConnectionWrapper.java:127)
> org.apache.cayenne.access.ExternalTransaction.close(ExternalTransaction.java:168)
> org.apache.cayenne.access.ExternalTransaction.commit(ExternalTransaction.java:105)
> 
> _______________________________________________________________________________________________________
> 
> Name: main
> State: BLOCKED on java.util.Collections$SynchronizedRandomAccessList@12a12fc owned by:
Worker-2
> Total blocked: 30  Total waited: 122
> 
> Stack trace:
> org.apache.cayenne.conn.PooledConnectionImpl.removeConnectionEventListener(PooledConnectionImpl.java:97)
> org.apache.cayenne.conn.PoolManager.dispose(OpconPoolManager.java:169)
>   - locked org.apache.cayenne.conn.PoolManager@197871d
> com.sma.core.session.Session.disconnect(Session.java:189)
>   - locked java.lang.Object@167a300
> com.sma.core.session.Session.logout(Session.java:269)
>   - locked java.lang.Object@167a300
> 


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