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https://issues.apache.org/jira/browse/COCOON-2340?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13834764#comment-13834764
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Ivan Lagunov commented on COCOON-2340:
--------------------------------------

Hi Javier,

I would like to try Cocoon 2.2.1 first but could you say where it's located? I 
suppose it must be under trunk here 
http://svn.apache.org/repos/asf/cocoon/trunk/ ? Is it stable enough for 
Production usage? I mean it's written here that SNAPSHOTS are not tested and 
not guaranteed to even build cleanly: https://cocoon.apache.org/mirror.cgi

Ivan

> XMLByteStreamCompiler in not thread-safe
> ----------------------------------------
>
>                 Key: COCOON-2340
>                 URL: https://issues.apache.org/jira/browse/COCOON-2340
>             Project: Cocoon
>          Issue Type: Bug
>          Components: * Cocoon Core
>    Affects Versions: 2.2
>            Reporter: Ivan Lagunov
>
> I'm periodically getting the following exceptions in different places:
> Caused by: java.lang.ArrayIndexOutOfBoundsException
>         at java.lang.System.arraycopy(Native Method)
>         at 
> org.apache.cocoon.components.sax.XMLByteStreamCompiler.getSAXFragment(XMLByteStreamCompiler.java:61)
>         at 
> org.apache.cocoon.components.pipeline.impl.ExpiresCachingProcessingPipeline.processXMLPipeline(ExpiresCachingProcessingPipeline.java:152)
> After debugging I've found the root cause. It happens due to multi-threading 
> when one thread allocates newbuf array, then another thread increments 
> bufCount in write method and then the first thread fails on System.arraycopy 
> invocation.
> I suggest making getSAXFragment and write methods synchronized. It should 
> resolve the issue. If it helps, I'll provide a patch later.



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