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https://issues.apache.org/jira/browse/DIRMINA-653?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12683802#action_12683802
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Mauritz Lovgren commented on DIRMINA-653:
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I agree, DIRMINA-675 seems very much like my issue, except that I experienced
that messages were lost, not duplicated... but I concluded that the source was
exactly the same spot in code that you have just fixed, so we keep this closed
for now. I reopen the moment I find it to be a false true :-).
> IoSession.write not thread-safe? Loosing messages under heavy multi-threaded
> write on same session.
> ---------------------------------------------------------------------------------------------------
>
> Key: DIRMINA-653
> URL: https://issues.apache.org/jira/browse/DIRMINA-653
> Project: MINA
> Issue Type: Bug
> Components: Core, Filter
> Affects Versions: 2.0.0-M4
> Environment: Windows Vista 64-bit
> Reporter: Mauritz Lovgren
> Fix For: 2.0.0-RC1
>
>
> I am writing a stress-test that tests multi-thread safetyness of our
> stateless encoder / decoder under heavy load and I am observing that messages
> are silently lost during session.write(Object), (the lost messages do not
> seem to reach the underlying socket buffer at all).
> I am using one encoder / decoder that is stateless. No executor filter, only
> the filter codec and a basic io handler.
> Synchronizing on the session.write makes the problem go away;
> synchronized (session)
> {
> future = session.write(message);
> }
> Do I really have to synchronize on the session to solve this issue?
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