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From "Laurent Marchal (JIRA)" <j...@apache.org>
Subject [jira] Created: (CAY-1513) Deadlock in PoolManager
Date Tue, 23 Nov 2010 16:44:14 GMT
Deadlock in PoolManager
-----------------------

                 Key: CAY-1513
                 URL: https://issues.apache.org/jira/browse/CAY-1513
             Project: Cayenne
          Issue Type: Bug
          Components: Core Library
    Affects Versions: 3.0
         Environment: Linux
            Reporter: Laurent Marchal


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.

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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