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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