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https://issues.apache.org/jira/browse/QPID-2653?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12877119#action_12877119
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Sorin Suciu commented on QPID-2653:
-----------------------------------
Agreed Robbie, here comes a better patch I hope.
> 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,
> qpid-2653.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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