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

[Ovidiu Feodorov (JIRA)]

     [ http://jira.jboss.com/jira/browse/JBMESSAGING-490?page=all ]

Ovidiu Feodorov closed JBMESSAGING-490.
---------------------------------------

    Resolution: Done

> 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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