MDB not receiving messages from JMS queue.

00:50:28,915 WARN  [org.hornetq.core.protocol.core.impl.RemotingConnectionImpl] (hornetq-failure-check-thread) Connection failure has been detected: Did not receive data from invm:0. It is likely the client has exited or crashed without closing its connection, or the network between the server and client has failed. You also might have configured connection-ttl and client-failure-check-period incorrectly. Please check user manual for more information. The connection will now be closed. [code=3]
00:50:29,208 WARN  [org.hornetq.core.server.impl.ServerSessionImpl] (hornetq-failure-check-thread) Client connection failed, clearing up resources for session e33d5fe6-caf3-11e2-bc0f-3d92824f2653
00:50:29,235 WARN  [org.hornetq.core.server.impl.ServerSessionImpl] (hornetq-failure-check-thread) Cleared up resources for session e33d5fe6-caf3-11e2-bc0f-3d92824f2653
[the above two messages are repeated a number of times in rapid succession...and then finally we get...]
00:50:30,187 WARN  [org.hornetq.jms.server.recovery.RecoveryDiscovery] (Thread-18647 (HornetQ-client-global-threads-2106576636)) Notified of connection failure in xa discovery, we will retry on the next recovery: HornetQException[errorCode=2 message=Channel disconnected]
        at org.hornetq.core.client.impl.ClientSessionFactoryImpl.connectionDestroyed(ClientSessionFactoryImpl.java:381) [hornetq-core-2.2.16.Final.jar:2.2.16.Final (HQ_2_2_16_FINAL, 122)]
        at org.hornetq.core.remoting.impl.invm.InVMConnector$Listener$1.run(InVMConnector.java:203) [hornetq-core-2.2.16.Final.jar:2.2.16.Final (HQ_2_2_16_FINAL, 122)]
        at org.hornetq.utils.OrderedExecutorFactory$OrderedExecutor$1.run(OrderedExecutorFactory.java:100) [hornetq-core-2.2.16.Final.jar:2.2.16.Final (HQ_2_2_16_FINAL, 122)]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) [rt.jar:1.7.0_07]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) [rt.jar:1.7.0_07]
        at java.lang.Thread.run(Thread.java:722) [rt.jar:1.7.0_07]
00:50:29,240 WARN  [org.hornetq.jms.server.recovery.HornetQXAResourceWrapper] (Thread-18651 (HornetQ-client-global-threads-2106576636)) Notified of connection failure in xa recovery connectionFactory for provider ClientSessionFactoryImpl [serverLocator=ServerLocatorImpl [initialConnectors=[org-hornetq-core-remoting-impl-invm-InVMConnectorFactory?server-id=0], discoveryGroupConfiguration=null], connectorConfig=org-hornetq-core-remoting-impl-invm-InVMConnectorFactory?server-id=0, backupConfig=null] will attempt reconnect on next pass: HornetQException[errorCode=2 message=Channel disconnected]
        at org.hornetq.core.client.impl.ClientSessionFactoryImpl.connectionDestroyed(ClientSessionFactoryImpl.java:381) [hornetq-core-2.2.16.Final.jar:2.2.16.Final (HQ_2_2_16_FINAL, 122)]
        at org.hornetq.core.remoting.impl.invm.InVMConnector$Listener$1.run(InVMConnector.java:203) [hornetq-core-2.2.16.Final.jar:2.2.16.Final (HQ_2_2_16_FINAL, 122)]
        at org.hornetq.utils.OrderedExecutorFactory$OrderedExecutor$1.run(OrderedExecutorFactory.java:100) [hornetq-core-2.2.16.Final.jar:2.2.16.Final (HQ_2_2_16_FINAL, 122)]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) [rt.jar:1.7.0_07]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) [rt.jar:1.7.0_07]
        at java.lang.Thread.run(Thread.java:722) [rt.jar:1.7.0_07]
00:50:38,633 INFO  [org.hornetq.jms.server.recovery.RecoveryDiscovery] (HornetQ Recovery Discovery Reinitialization) Starting RecoveryDiscovery on XARecoveryConfig [transportConfiguration = [org-hornetq-core-remoting-impl-invm-InVMConnectorFactory?server-id=0], discoveryConfiguration = null, username=null, password=null]
00:50:38,636 INFO  [org.hornetq.jms.server.recovery.RecoveryDiscovery] (HornetQ Recovery Discovery Reinitialization) RecoveryDiscovery started fine on XARecoveryConfig [transportConfiguration = [org-hornetq-core-remoting-impl-invm-InVMConnectorFactory?server-id=0], discoveryConfiguration = null, username=null, password=null]