Deadlock in PoolManager

From: Laurent Marchal (lmarcha..mausa.com)
Date: Tue Nov 23 2010 - 15:54:18 UTC

  • Next message: Andrus Adamchik: "Re: 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.OpconPoolManage..97871d 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$SynchronizedRandomAccessLis..2a12fc
    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$SynchronizedRandomAccessLis..2a12fc 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.PoolManage..97871d
    com.sma.core.session.Session.disconnect(Session.java:189)
        - locked java.lang.Objec..67a300
    com.sma.core.session.Session.logout(Session.java:269)
        - locked java.lang.Objec..67a300

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