[jboss-jira] [JBoss JIRA] Commented: (JGRP-540) Multiplexer: ordering issue

Wed Jun 27 15:30:57 EDT 2007

    [ http://jira.jboss.com/jira/browse/JGRP-540?page=comments#action_12367088 ] 

Vladimir Blagojevic commented on JGRP-540:
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I also noticed that as soon as task is run on callers thread we run into reordering problems. If non-bound LinkedBlockingQueue is used test succeeds consistently. However, if LinkedBlockingQueue is bound to 5-10 or so elements it is very likely that task will be run on callers thread. If this happens testOrdering fails. I also verified that when using SynchronousQueue we often end up running on callers thread.

> Multiplexer: ordering issue
> ---------------------------
>
>                 Key: JGRP-540
>                 URL: http://jira.jboss.com/jira/browse/JGRP-540
>             Project: JGroups
>          Issue Type: Bug
>            Reporter: Bela Ban
>         Assigned To: Vladimir Blagojevic
>             Fix For: 2.5
>
>
> Sometimes messages from the same sender are not delivered in the correct order, the test that shows this (happens infrequently) is MultiplexerTest.testOrdering(). 
> When disabling the Multiplexer thread pool (-Djgroups.mux.enabled=false), everything works fine, so I suspect this is a thread pool issue in the Multiplexer (FIFOMessageQueue).

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