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https://issues.apache.org/jira/browse/DIRMINA-542?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12576906#action_12576906
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Trustin Lee commented on DIRMINA-542:
-------------------------------------
I found that the test passes with the byte code generated by Eclipse Java
Compiler but fails with SUN Java Compiler. CircularQueueTest fails randomly.
We cannot say that it's a concurrency issue because the test runs in a single
thread. It looks definitely like a JVM or compiler bug - probably SUN VM
doesn't like the code SUN Java Compiler produced or the byte code that SUN Java
Compiler produced is wrong.
Changing one field in CircularQueue to be volatile works around the problem,
but I didn't figure out why exactly it fixes the problem - SUN JVM might be
optimizing CircularQueue in a wrong way and the volatile field might be
preventing bad optimization.
> ArrayIndexOutOfBoundsException in CircularQueue.shrinkIfNeeded()
> ----------------------------------------------------------------
>
> Key: DIRMINA-542
> URL: https://issues.apache.org/jira/browse/DIRMINA-542
> Project: MINA
> Issue Type: Bug
> Components: Core
> Affects Versions: 2.0.0-M1
> Reporter: Trustin Lee
> Assignee: Trustin Lee
> Priority: Critical
> Fix For: 2.0.0-M2
>
>
> ArrayIndexOutOfBoundsException is raised by CircularQueue.shrinkIfNeeded()
> when the size of the queue is 0:
> java.lang.ArrayIndexOutOfBoundsException
> at org.apache.mina.util.CircularQueue.shrinkIfNeeded(CircularQueue.java:233)
> at org.apache.mina.util.CircularQueue.poll(CircularQueue.java:108)
> at
> org.apache.mina.filter.codec.ProtocolCodecFilter$ProtocolDecoderOutputImpl.flush(ProtocolCodecFilter.java:375)
> at
> org.apache.mina.filter.codec.ProtocolCodecFilter.messageReceived(ProtocolCodecFilter.java:187)
> at
> org.apache.mina.common.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:401)
> at
> org.apache.mina.common.DefaultIoFilterChain.access$1200(DefaultIoFilterChain.java:38)
> at
> org.apache.mina.common.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:820)
> at
> org.apache.mina.common.DefaultIoFilterChain$HeadFilter.messageReceived(DefaultIoFilterChain.java:604)
> at
> org.apache.mina.common.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:401)
> at
> org.apache.mina.common.DefaultIoFilterChain.fireMessageReceived(DefaultIoFilterChain.java:395)
> at
> org.apache.mina.common.AbstractPollingIoProcessor.read(AbstractPollingIoProcessor.java:425)
> at
> org.apache.mina.common.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:387)
> at
> org.apache.mina.common.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:379)
> at
> org.apache.mina.common.AbstractPollingIoProcessor.access$400(AbstractPollingIoProcessor.java:43)
> at
> org.apache.mina.common.AbstractPollingIoProcessor$Worker.run(AbstractPollingIoProcessor.java:676)
> at
> org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:51)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
> at java.lang.Thread.run(Thread.java:619)
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