SocketException and NullPointerException

[Hollerman Geralyn M <gm...@louisiana.edu>]

Folks,
I have 2 errors in my catalina.out that I'm trying to chase down, and for both 
I've about come up with zero in terms of figuring out what's causing them and/or 
how to "fix" them. I'd appreciate ANY ideas/suggestions/comments!

The first is of the form

Mar 22, 2004 8:38:32 AM org.apache.tomcat.util.net.TcpWorkerThread runIt
SEVERE: Remote Host /xxx.xxx.xxx.xxx SocketException: Invalid argument

This one shows up somewhat sporadically - some days there will be several, other 
days, none.

The second looks like

StandardWrapperValve[uPortal]: Servlet.service() for servlet uPortal threw exception
java.lang.RuntimeException: java.lang.NullPointerException
java.lang.RuntimeException: java.lang.NullPointerException
         at 
org.apache.xalan.transformer.TransformerImpl.run(TransformerImpl.java:3364)
         at 
org.apache.xalan.transformer.TransformerHandlerImpl.endDocument(TransformerHandlerImpl.java:427)
         at 
org.jasig.portal.utils.SAX2FilterImpl.endDocument(SAX2FilterImpl.java:684)
         at 
org.jasig.portal.utils.SAX2BufferImpl.outputBuffer(SAX2BufferImpl.java:210)
         at org.jasig.portal.UserInstance.renderState(UserInstance.java:538)
         at org.jasig.portal.UserInstance.writeContent(UserInstance.java:180)
         at 
org.jasig.portal.PortalSessionManager.doGet(PortalSessionManager.java:246)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:743)
[...] (I can give you the full trace, but it's long and ugly - I think you get 
the idea here)

Now, I know this one has something to do with the XML parser and probably the 
stylesheet used - something that's passed is null for some reason, and as far as 
the program is concerned, it shouldn't be. What could cause this? I get this 
error from our production system - I'm running the same version of Tomcat 
(5.0.16) on a development system as well, and the error never shows up there. I 
have the same versions of XML parsers on both boxes - the .class files in them 
that are used in the stack trace (like TransformerImpl) are the same on both 
systems (yes, I checked.). I'd really like to get this fixed - the server 
appears to start-up fine, with no errors listed.

Thanks for any feedback!!
-- 
Lynn Hollerman.

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