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Posted to users@cocoon.apache.org by Jenny Brown <je...@bigbrother.net> on 2002/11/12 16:56:24 UTC
null pointer exception in servlet
I'm having trouble with a recently set up cocoon instance, processing an
example xml and xslt file. This seems to be happening inside Cocoon, so
I am not sure how to fix it.
org.apache.cocoon.ProcessingException:
Exception during processing of
http://jenny.myinfogenic.net/sitebuilder/simple.xsl:
java.lang.NullPointerException at
org.apache.cocoon.components.source.AbstractStreamSource.toSAX(AbstractStreamSource.java:211) at
org.apache.cocoon.components.xslt.XSLTProcessorImpl.getTransformerHandler(XSLTProcessorImpl.java:268) at
org.apache.cocoon.components.xslt.XSLTProcessorImpl.getTransformerHandler(XSLTProcessorImpl.java:239) at
org.apache.cocoon.components.xslt.XSLTProcessorImpl.transform(XSLTProcessorImpl.java:311) at
jendvsl.web_post_xsl(jendvsl.java:87)
Thanks.
Jenny Brown
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Re: null pointer exception in servlet
Posted by Jenny Brown <je...@bigbrother.net>.
On Tue, 12 Nov 2002, Bobby Mitchell wrote:
> Jenny Brown wrote:
>
> >I had indeed missed that step. I've done it now, but don't seem to be
> >having any better results... same error. I'm not sure how to test that
> >the /jre/lib/ changes actually took effect though. I did restart tomcat
> >just in case.
> >
> >
> <snip>
> Also, make sure to delete the contents of the tomcat work directory
> before you restart tomcat.
I did that and restarted, still the same problem. Here's a snippet of
Cocoon's code where the NPE is actually occurring, in AbstractStreamSource:
public void toSAX(ContentHandler handler)
throws SAXException, ProcessingException
{
Parser parser = null;
try {
parser = (Parser)this.manager.lookup(Parser.ROLE); <--- NPE this line
parser.parse( this.getInputSource(), handler);
}
...
}
Since that line has multiple references I'm not quite sure which one
ended up being null; but maybe this is enough for someone to notice what
I am likely missing?
Thanks.
Jenny Brown
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Re: null pointer exception in servlet
Posted by Bobby Mitchell <bm...@niac.usra.edu>.
Jenny Brown wrote:
>I had indeed missed that step. I've done it now, but don't seem to be
>having any better results... same error. I'm not sure how to test that
>the /jre/lib/ changes actually took effect though. I did restart tomcat
>just in case.
>
>
<snip>
Also, make sure to delete the contents of the tomcat work directory
before you restart tomcat.
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Re: null pointer exception in servlet
Posted by Jenny Brown <je...@bigbrother.net>.
I had indeed missed that step. I've done it now, but don't seem to be
having any better results... same error. I'm not sure how to test that
the /jre/lib/ changes actually took effect though. I did restart tomcat
just in case.
Here's the error I'm still getting:
DEBUG 10371 [jendvsl ] (): XSLTProcessorImpl:
transform source = org.apache.cocoon.components.source.URLSource@2c3327,
stylesheet = org.apache.cocoon.components.source.URLSource@d24e3f,
parameters = org.apache.avalon.framework.parameters.Parameters@f41e9,
result = javax.xml.transform.stream.StreamResult@b05acd
DEBUG 10371 [jendvsl ] (): Creating new Templates
for http://jenny.myinfogenic.net/sitebuilder/simple.xsl
DEBUG 10371 [jendvsl ] ():
Source = org.apache.cocoon.components.source.URLSource@d24e3f,
templatesHandler = org.apache.xalan.processor.StylesheetHandler@1989b5
java.lang.NullPointerException at
org.apache.cocoon.components.source.AbstractStreamSource.toSAX(AbstractStreamSource.java:204) at
org.apache.cocoon.components.xslt.XSLTProcessorImpl.getTransformerHandler(XSLTProcessorImpl.java:268)
On Tue, 12 Nov 2002, Joerg Heinicke wrote:
> Jenny Brown wrote:
> > Good question. I downloaded Cocoon-2.0.3 as a source tar/gzip. I then
> > built it using the most recent version of ant. It built successfully
> > and told me during build that it was built for 1.4 and wouldn't work
> > with other versions.
> >
> > So... Hopefully that answers your question, as it is a rather important one.
>
> That's ok. But did you read
> http://xml.apache.org/cocoon/installing/index.html "Java 1.4
> configuration"??
>
> Joerg
>
>
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Re: null pointer exception in servlet
Posted by Joerg Heinicke <jo...@gmx.de>.
Jenny Brown wrote:
> Good question. I downloaded Cocoon-2.0.3 as a source tar/gzip. I then
> built it using the most recent version of ant. It built successfully
> and told me during build that it was built for 1.4 and wouldn't work
> with other versions.
>
> So... Hopefully that answers your question, as it is a rather important one.
That's ok. But did you read
http://xml.apache.org/cocoon/installing/index.html "Java 1.4
configuration"??
Joerg
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Re: null pointer exception in servlet
Posted by Jenny Brown <je...@bigbrother.net>.
On Tue, 12 Nov 2002, Charles Brewster wrote:
> A trivial point, not to be insulting, :-) but did you install the vm14
> download version of cocoon built for 1.4.0
Good question. I downloaded Cocoon-2.0.3 as a source tar/gzip. I then
built it using the most recent version of ant. It built successfully
and told me during build that it was built for 1.4 and wouldn't work
with other versions.
So... Hopefully that answers your question, as it is a rather important one.
Thanks for any help.
Jenny Brown
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Re: null pointer exception in servlet
Posted by Charles Brewster <ch...@shaw.ca>.
Jenny Brown wrote:
>On Tue, 12 Nov 2002, Charles Brewster wrote:
>
>I was pretty sure the XML was fine since it came from example code, but
>that doesn't help me much in solving my actual problem. I'm looking for
>why Cocoon is throwing a null pointer exception, as in, what do I even
>try to debug or look into to figure this out?
>
>I am running 1.4.0 jdk on a mandrake linux box:
>
>java version "1.4.0_01"
>Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0_01-b03)
>Java HotSpot(TM) Client VM (build 1.4.0_01-b03, mixed mode)
>
>
>
A trivial point, not to be insulting, :-) but did you install the vm14
download version of cocoon built for 1.4.0
>
>
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>
>
>
>
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Re: null pointer exception in servlet
Posted by Jenny Brown <je...@bigbrother.net>.
On Tue, 12 Nov 2002, Charles Brewster wrote:
> Jenny Brown wrote:
>
> >I'm having trouble with a recently set up cocoon instance, processing an
> >example xml and xslt file. This seems to be happening inside Cocoon, so
> >I am not sure how to fix it.
> Jenny I downloaded your two files simple.xsl to my own coccon
> installation and they run fine.
>
> I am running tomcat 4 and see you are on 3.3 .. Don't know what jdk you
> are using but it seems to be an installation prob as your xml is fine
I was pretty sure the XML was fine since it came from example code, but
that doesn't help me much in solving my actual problem. I'm looking for
why Cocoon is throwing a null pointer exception, as in, what do I even
try to debug or look into to figure this out?
I am running 1.4.0 jdk on a mandrake linux box:
java version "1.4.0_01"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0_01-b03)
Java HotSpot(TM) Client VM (build 1.4.0_01-b03, mixed mode)
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Re: null pointer exception in servlet
Posted by Charles Brewster <ch...@shaw.ca>.
Jenny Brown wrote:
>I'm having trouble with a recently set up cocoon instance, processing an
>example xml and xslt file. This seems to be happening inside Cocoon, so
>I am not sure how to fix it.
>
>
>org.apache.cocoon.ProcessingException:
>Exception during processing of
>http://jenny.myinfogenic.net/sitebuilder/simple.xsl:
>
>
Jenny I downloaded your two files simple.x?l to my own coccon
installation and they run fine.
I am running tomcat 4 and see you are on 3.3 .. Don't know what jdk you
are using but it seems to be an installation prob as your xml is fine
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