Hi,
you probably have hit this one: https://jira.jboss.org/browse/JBMESSAGING-1776
This issue may cause JCA not to receive next connection failure notification, therefore stops reconnection.
The scenario could be:
1. connection failure happened, JCA tries to reconnect.
2. During reconnect, the JCA will create a new connection internally and register a exception listener.
3. Just after the new connection has been created but before the listener is registered, the new connection is broken.
4. So the JCA eventually registers a listener on a already 'bad' connection.
5. due to this issue, JCA won't get notified for this bad connection and thinks it a good one.
6. So the MDB won't get any more messages since.