Hi all, we are currently using JBoss 3.2.3 in production and have an issue where two messages arrive in a different order.
The message are sent by a Singleton MDB in the server to a permanent queue. The client is a Java process having two JMS sessions to the server: one for receiving and one for sending messages. In very rare, nearly unreproducible case it happens, that two messages arrive in a different order. We just notice that both message arrive in the same millisecond, but could not reproduce this behaviour consistently. Therefore, we have no detailed TRACE log output for this issue. Looking at the JBoss site, I found two issues: http://sourceforge.net/tracker/?group_id=22866&atid=376685&func=detail&aid=885053 ([ 885053 ] UIL2 thead leak during broken connection attempt) and a note in the document "Changes between 3.2.6RC2 and 3.2.6RC1" (http://sourceforge.net/docman/display_doc.php?docid=24862&group_id=22866) anonymous wrote : # Simulate the single thread per session to avoid concurrent delivery to a message listener, as required by the spec. | | * messaging/src/main/org/jboss/mq/SpyMessageConsumer.java | * messaging/src/main/org/jboss/mq/SpySession.java | Looking at the related code: http://cvs.sourceforge.net/viewcvs.py/jboss/jbossmq/src/main/org/jboss/mq/SpyMessageConsumer.java?r1=1.20.2.7&r2=1.20.2.8&only_with_tag=Branch_3_2 I found a delivery lock around the onMessage() call. So my question is: Is it possible in UIL2 that several thread try to deliver a message via onMessage() at the same time causing our race condition? If this is true, this JBoss 3.2.6 change may fix our issue. Looking forward to your answer Cheers, JÃrg View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=3858912#3858912 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=3858912 ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://productguide.itmanagersjournal.com/ _______________________________________________ JBoss-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-user
