[jboss-jira] [JBoss JIRA] Created: (JBMESSAGING-490) Race condition on ServerConsumerEndpoint creation

[Ovidiu Feodorov (JIRA)]

Race condition on ServerConsumerEndpoint creation
-------------------------------------------------

                 Key: JBMESSAGING-490
                 URL: http://jira.jboss.com/jira/browse/JBMESSAGING-490
             Project: JBoss Messaging
          Issue Type: Bug
            Reporter: Ovidiu Feodorov
         Assigned To: Ovidiu Feodorov
            Priority: Minor
             Fix For: 1.0.1.CR4


Because "started" is not declared volatile, there's a minor race condition between the construction of the the ServerConsumerEndpoint on a started connection, and delivery request.

Test fragment:

          conn.start();
          Session sess = conn.createSession(true, Session.SESSION_TRANSACTED);
          ....
          MessageConsumer cons1 = sess.createConsumer(queue);


Trace:

2006-08-04 10:05:24,050 23375 DEBUG [org.jboss.jms.server.endpoint.ServerSessionEndpoint] (main:) creating consumer for JBossQueue[Queue], selector null, subscription null
2006-08-04 10:05:24,050 23375 TRACE [org.jboss.jms.server.endpoint.ServerConsumerEndpoint] (main:) creating consumer endpoint -2147483430
2006-08-04 10:05:24,050 23375 TRACE [org.jboss.messaging.core.ChannelSupport] (main:) CoreQueue[1] attempting to add receiver ConsumerEndpoint[-2147483430]
2006-08-04 10:05:24,050 23375 TRACE [org.jboss.messaging.core.ChannelSupport] (main:) receiver ConsumerEndpoint[-2147483430] added
2006-08-04 10:05:24,050 23375 DEBUG [org.jboss.jms.server.endpoint.ServerConsumerEndpoint] (main:) ConsumerEndpoint[-2147483430] created
2006-08-04 10:05:24,050 23375 TRACE [org.jboss.jms.server.endpoint.ServerConsumerEndpoint] (Thread-3:) ConsumerEndpoint[-2147483439] receives reference 3584 for delivery
2006-08-04 10:05:24,050 23375 TRACE [org.jboss.jms.server.endpoint.ServerSessionEndpoint] (main:) SessionEndpoint[-2147483431] caching consumer -2147483430
2006-08-04 10:05:24,050 23375 DEBUG [org.jboss.jms.server.endpoint.ServerConsumerEndpoint] (Thread-3:) ConsumerEndpoint[-2147483439] NOT started yet!


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