Ron,
Unfortunately we had an incident with the 2.2.4 jar that locked up all remote client activity.
I tried my hand at analyzing the thread dump, let me know if you think I'm wrong. I think it may be related to JBREM-1242 but too involved for me to figure out.
Assuming that Object@383d87 is connectionValidatorLock and Object@8ecb42 is clientLeaseLock, the threads below show that Timer-9954 and Thread-390047 block each other. Which would only be slightly bad, but then Timer-2 blocks and then all the WorkerThreads like WorkerThread#1664 is blocked since handleClientFailure is synchronized. There was actually a thread Timer-9953 exactly like Timer-9954 as well.
Thread: Timer-9954 : priority:5, demon:true, threadId:782301, threadState:BLOCKED, lockName:java.lang.Object@383d87
org.jboss.remoting.Client.notifyListeners(Client.java:1781)
...
Thread: Thread-390047 : priority:5, demon:true, threadId:778140, threadState:BLOCKED, lockName:java.lang.Object@8ecb42
org.jboss.remoting.MicroRemoteClientInvoker.establishLease(MicroRemoteClientInvoker.java:458)
...
Thread: Timer-2 : priority:5, demon:true, threadId:39, threadState:BLOCKED, lockName:java.lang.Object@383d87
org.jboss.remoting.Client.disconnect(Client.java:735)
org.jboss.remoting.callback.ServerInvokerCallbackHandler.destroy(ServerInvokerCallbackHandler.java:1016)
org.jboss.remoting.callback.ServerInvokerCallbackHandler.shutdown(ServerInvokerCallbackHandler.java:1028)
org.jboss.jms.server.endpoint.ServerConnectionEndpoint.closeCallbackClient(ServerConnectionEndpoint.java:474)
org.jboss.jms.server.connectionmanager.SimpleConnectionManager.cleanupForSessionID(SimpleConnectionManager.java:468)
org.jboss.jms.server.connectionmanager.SimpleConnectionManager.handleClientFailure(SimpleConnectionManager.java:201)
org.jboss.jms.server.connectionmanager.SimpleConnectionManager.handleConnectionException(SimpleConnectionManager.java:241)
...
Thread: WorkerThread#1664[10.48.16.175:56059] : priority:5, demon:false, threadId:786648, threadState:BLOCKED, lockName:org.jboss.jms.server.connectionmanager.SimpleConnectionManager@2cf63
org.jboss.jms.server.connectionmanager.SimpleConnectionManager.handleClientFailure(SimpleConnectionManager.java:201)
...
Thanks,
David