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https://issues.apache.org/jira/browse/UIMA-5126?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15555067#comment-15555067
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Marshall Schor commented on UIMA-5126:
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Looking at the stack trace, the last UIMA code is a call in
org.apache.uima.util.XMLSerializer, line 277, which is
{code}mHandler.startElement(...){code}
mHandler is set from
javax.xml.transform.sax,SAXTransformerFactory.newInstance().
Looks like Saxon 9 registered itself as the transformer factory.
An internet search for a saxon 9 bug of this variety did not turn up anything.
Burn, if you could reliably reproduce this, could you wrap the call on line 277
of XMLSerializer with a try / catch, and when the error happens, print out the
arguments? Perhaps UIMA is passing flaky (that's a technical term :-) )
arguments to start element.
> UIMA-AS thows an NPE if saxon9he.jar is in the classpath
> --------------------------------------------------------
>
> Key: UIMA-5126
> URL: https://issues.apache.org/jira/browse/UIMA-5126
> Project: UIMA
> Issue Type: Bug
> Components: Async Scaleout
> Reporter: Burn Lewis
> Priority: Minor
> Fix For: 2.9.0AS
>
>
> Works OK if saxon8 is in the classpath. Failure occurs when replying to a
> getmeta request. The stack trace is in UIMA-5117
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