>>>>> "GA" == George Armhold <[EMAIL PROTECTED]> writes:
GA> Hi, I was running into frequent ArrayIndexOutOfBoundsException
GA> when using Batik-1.0.
First off Batik 1.0 is getting pretty old now. I strongly suggest
using one of 1.1 rc releases.
GA> Here are two typical stack traces:
You appear to have trimmed the stack traces...
GA> org.apache.batik.svggen.SVGGraphics2D.getTopLevelGroup(SVGGraphics2D.java:373)
Who is calling this???
GA> org.apache.batik.svggen.SVGGraphics2D.fill(SVGGraphics2D.java:1019)
Who is calling this???
GA> It seems to crash roughly half the time with one of the above
GA> stack traces, so I'm guessing it's a threading problem in the
GA> Batik library;
There are no Batik threads shown in those stack traces. Note that
the SVGGen class is _not_ thread safe and for performance and
complexity reasons probably never will be.
GA> my code is single-threaded.
Is the code calling your code single-threaded? Just because _you_
don't create threads doesn't mean you aren't be invoked from multiple
threads (such as the event thread, and the application main thread for
a swing application, as a servelet you may be invoked from a
different thread for every server request). If you are using a
non-thread safe object in such circumstances it is up to you to use
mutex blocks to protect all your accesses to the shared unthread safe
resource.
GA> I was able to fix it with the following patch.
It appears that this patch is attempting to make the SVGGen
classes at least partially thread safe. This is essentially a
hopeless cause (as the entire DOM tree implementation would have to be
made thread safe to really solve the problem).
GA> I'm not on the batik-dev mailing list, so please Cc me with any
GA> replies to this message. (I am on batik-users.)
I strongly suspect that your code is being called from multiple
threads, and those multiple threads are then accessing a shared
instance of SVGGen, this will not work.
GA> Thanks.
I don't think this is the answer you are looking for but I hope it
helps anyway.
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