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Posted to dev@qpid.apache.org by "Sorin Suciu (JIRA)" <qp...@incubator.apache.org> on 2010/06/09 14:17:12 UTC

[jira] Updated: (QPID-2653) Double checked locking in org.apache.qpid.server.transport.ThreadPoolFilter

     [ https://issues.apache.org/jira/browse/QPID-2653?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sorin Suciu updated QPID-2653:
------------------------------

    Attachment: 0001-Double-checked-locking-in-org.apache.qpid.server.tra.patch

> Double checked locking in org.apache.qpid.server.transport.ThreadPoolFilter
> ---------------------------------------------------------------------------
>
>                 Key: QPID-2653
>                 URL: https://issues.apache.org/jira/browse/QPID-2653
>             Project: Qpid
>          Issue Type: Bug
>          Components: Java Broker
>    Affects Versions: 0.7
>            Reporter: Sorin Suciu
>            Priority: Minor
>             Fix For: 0.7
>
>         Attachments: 0001-Double-checked-locking-in-org.apache.qpid.server.tra.patch
>
>
>  org.apache.qpid.server.transport.ThreadPoolFilter has a double check locking in this method: 
>     private SessionBuffer getSessionBuffer(IoSession session)
>     {
>         final Map buffers = this.buffers;
>         SessionBuffer buf = (SessionBuffer) buffers.get(session);
>         if (buf == null)
>         {
>             synchronized (buffers)
>             {
>                 buf = (SessionBuffer) buffers.get(session);
>                 if (buf == null)
>                 {
>                     buf = new SessionBuffer(session);
>                     buffers.put(session, buf);
>                 }
>             }
>         }
>         return buf;
>     }

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