I can provide a patch to make it behave that way. But before I do, what
about just making the null-check explicit in the various XML methods in the
transformer? That way the offending method call still shows up in the
actual stack trace.
--
David Winslow
OpenGeo - http://opengeo.org/
On Fri, Jun 1, 2012 at 12:41 PM, Andrea Aime
<[email protected]>wrote:
> Hi,
> today I was looking at the following stack trace:
>
> aused by: javax.xml.transform.TransformerException:
> java.lang.RuntimeException: Unexpected error occurred during describe
> coverage xml encoding
> at
> com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:732)
> at
> com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:336)
> at
> org.geotools.xml.transform.TransformerBase$Task.run(TransformerBase.java:300)
> at
> org.geotools.xml.transform.TransformerBase.transform(TransformerBase.java:133)
> at
> org.geotools.xml.transform.TransformerBase.transform(TransformerBase.java:112)
> at
> org.geoserver.wcs.response.Wcs10DescribeCoverageResponse.write(Wcs10DescribeCoverageResponse.java:35)
> ... 78 more
> Caused by: java.lang.RuntimeException: Unexpected error occurred during
> describe coverage xml encoding
> at
> org.geoserver.wcs.response.Wcs10DescribeCoverageTransformer$WCS100DescribeCoverageTranslator.encode(Wcs10DescribeCoverageTransformer.java:201)
> at
> org.geotools.xml.transform.TransformerBase$XMLReaderSupport.parse(TransformerBase.java:940)
> at
> com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transformIdentity(TransformerImpl.java:654)
> at
> com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:723)
> ... 83 more
> Caused by: java.lang.NullPointerException
> at
> com.sun.org.apache.xml.internal.serializer.ToStream.writeAttrString(ToStream.java:1962)
> at
> com.sun.org.apache.xml.internal.serializer.ToStream.processAttributes(ToStream.java:1942)
> at
> com.sun.org.apache.xml.internal.serializer.ToStream.endElement(ToStream.java:2031)
> at
> com.sun.org.apache.xml.internal.serializer.ToUnknownStream.endElement(ToUnknownStream.java:848)
> at
> org.geotools.xml.transform.TransformerBase$TranslatorSupport._end(TransformerBase.java:770)
> at
> org.geotools.xml.transform.TransformerBase$TranslatorSupport.access$300(TransformerBase.java:433)
> at
> org.geotools.xml.transform.TransformerBase$TranslatorSupport$End.commit(TransformerBase.java:517)
> at
> org.geotools.xml.transform.TransformerBase$TranslatorSupport.commit(TransformerBase.java:665)
> at
> org.geoserver.wcs.response.Wcs10DescribeCoverageTransformer$WCS100DescribeCoverageTranslator.encode(Wcs10DescribeCoverageTransformer.java:196)
> ... 86 more
>
> The above stack trace is not very informative, because the commands were
> recorded and
> it's not visiable which one generated the NPE.
>
> How to make this easier to debug? I guess the commit method should catch
> the command that
> was recorded and dump it along with the exception with as much information
> as possible
> in order to at least see what the code was trying to write.
>
> Cheers
> Andrea
>
> --
> Ing. Andrea Aime
> GeoSolutions S.A.S.
> Tech lead
>
> Via Poggio alle Viti 1187
> 55054 Massarosa (LU)
> Italy
>
> phone: +39 0584 962313
> fax: +39 0584 962313
> mob: +39 339 8844549
>
> http://www.geo-solutions.it
> http://geo-solutions.blogspot.com/
> http://www.youtube.com/user/GeoSolutionsIT
> http://www.linkedin.com/in/andreaaime
> http://twitter.com/geowolf
>
>
>
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