[kepler-dev] [Bug 5172] Exceptions are sometimes thrown during sensor workflow run

[bugzilla-daemon at ecoinformatics.org]

http://bugzilla.ecoinformatics.org/show_bug.cgi?id=5172

Christopher Brooks <cxh at eecs.berkeley.edu> changed:

           What    |Removed                     |Added
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                 CC|                            |cxh at eecs.berkeley.edu

--- Comment #6 from Christopher Brooks <cxh at eecs.berkeley.edu> 2010-11-02 12:32:51 PDT ---
I took a quick look at the 
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
    at
sun.java2d.pipe.DuctusShapeRenderer.renderPath(DuctusShapeRenderer.java:93)

stack trace and did not find much:

http://stackoverflow.com/questions/1143099/what-causes-a-nullpointerexception-in-the-awt-eventqueue-0-thread
 - suggests using Eclipse to break on a NPE and
then follow the object back.

Looking around, it could be caused by running on one machine and displaying
on another.  

I suspect that there is either a threading bug somewhere that causes this
stack trace or there is a general bug that is not specific to this bug
report that is causing it.

To track down this stack trace, we'd need to know more about the platform,
the JDK and how to replicate the bug.

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