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Posted to user@cayenne.apache.org by Laurent Marchal <lm...@smausa.com> on 2010/11/23 16:54:18 UTC
Deadlock in PoolManager
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
Re: Deadlock in PoolManager
Posted by Laurent Marchal <lm...@smausa.com>.
Yeah I was trying to be "clean" and dispose it when I leave the application.
Filed as https://issues.apache.org/jira/browse/CAY-1513
Thank you.
Laurent.
Le 11/23/2010 10:33 AM, Andrus Adamchik a écrit :
> 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
>>
Re: Deadlock in PoolManager
Posted by Andrus Adamchik <an...@objectstyle.org>.
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
>