Hi Howard,
we found possible issue with JBM during our testing of patch JBPAPP-5841 for EAP 4.3 CP08.

When one node in cluster of four nodes loose a connection to DB and consumer tries from this node read messages then this consumer won't get exception. Consumer stays connected to this node and waits. I use consumer.receive(1000) and no exception is thrown and hangs up (it should receive null message after 1 s or exception).
Before i've patched the EAP 4.3 CP08 servers in cluster and disconnected DB from one of them, consumer got an exception when this node could not give him any messages. This is expected behaviour.

Please could you try to reproduce it? Please confirm that this is regression.

Mirek