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From "Robin Green" <>
Subject REPOST: Possible multithreading bug in XSPJavaProcessor
Date Sat, 06 May 2000 17:40:54 GMT
on Fri, 28 Apr 2000 I wrote

>I'm not the world's greatest expert on multithreading, but can I humbly
>suggest that there might be a lurking bug in XSPJavaProcessor?
>As far as I can see, the only sychronization in Cocoon is
>1) when creating the engine
>2) the MemoryStore
>and 3) an XSPUtil function (not relevant).
>So although there is MemoryStore synchronization, there is no
>synchronization related to the .java and .class files which are created by
>XSP. So you could theoretically have one thread partway through writing a
>file, and another thread reading that file - causing a hard-to-fathom 
>So I suggest synchronizing on compile(), and load() in XSPJavaProcessor, 
>on whatever writes the .java file to disk (synchronizing on the same object
>in all three cases). It introduces a bottleneck, but we can't edit the
>compiler, so it's the best we can do.
>Or have I missed something obvious?

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