Hi Raj,
It sounds like a strange and complicated situation. I can make a couple of suggestions.
1. Post the same question on the JBossMessaging forum (https://community.jboss.org/en/jbossmessaging).
2. Set up TRACE logging for JBossMessaging and Remoting. You can do that in $JBOSS_HOME/server/$CONFIG/conf/jboss-log4j.xml. Look for any additional information around the time of the failures.
-Ron