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Posted to dev@xalan.apache.org by "Brian Minchau (JIRA)" <xa...@xml.apache.org> on 2005/04/19 09:07:46 UTC
[jira] Updated: (XALANJ-2105) XMLReaderManager.releaseXMLReader(reader) - null pointer exception
[ http://issues.apache.org/jira/browse/XALANJ-2105?page=all ]
Brian Minchau updated XALANJ-2105:
----------------------------------
Attachment: XMLReaderManager.NPE.patch.txt
Attaching suggested patch to XMLReaderManager.
> XMLReaderManager.releaseXMLReader(reader) - null pointer exception
> ------------------------------------------------------------------
>
> Key: XALANJ-2105
> URL: http://issues.apache.org/jira/browse/XALANJ-2105
> Project: XalanJ2
> Type: Bug
> Reporter: Brian Minchau
> Attachments: XMLReaderManager.NPE.patch.txt
>
> In a program that is too large to attach, this exception happened:
> javax.xml.transform.TransformerException: Variable var13 is
> directly or indirectly referencing itself!
> at org.apache.xalan.transformer.MsgMgr.error(MsgMgr.java:309)
> at org.apache.xalan.transformer.MsgMgr.error(MsgMgr.java:212)
> at org.apache.xalan.templates.XUnresolvedVariable.execute
> (XUnresolvedVariable.java:107)
> at org.apache.xpath.VariableStack.getGlobalVariable
> (VariableStack.java:446)
> at org.apache.xpath.operations.Variable.execute(Variable.java:212)
> at org.apache.xpath.operations.Variable.execute(Variable.java:186)
> at org.apache.xpath.functions.FunctionDef1Arg.getArg0AsString
> (FunctionDef1Arg.java:95)
> at org.apache.xpath.functions.FuncNormalizeSpace.execute
> (FuncNormalizeSpace.java:46)
> at org.apache.xpath.functions.FuncSubstringAfter.execute
> (FuncSubstringAfter.java:45)
> at org.apache.xpath.XPath.execute(XPath.java:335)
> at org.apache.xalan.templates.ElemVariable.getValue
> (ElemVariable.java:278)
> at org.apache.xalan.templates.ElemVariable.execute
> (ElemVariable.java:246)
> at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates
> (TransformerImpl.java:2346)
> at org.apache.xalan.templates.ElemTemplate.execute
> (ElemTemplate.java:392)
> at org.apache.xalan.templates.ElemCallTemplate.execute
> (ElemCallTemplate.java:246)
> at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates
> (TransformerImpl.java:2346)
> at org.apache.xalan.templates.ElemChoose.execute(ElemChoose.java:116)
> at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes
> (ElemApplyTemplates.java:393)
> at org.apache.xalan.templates.ElemApplyTemplates.execute
> (ElemApplyTemplates.java:176)
> at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates
> (TransformerImpl.java:2346)
> at org.apache.xalan.templates.ElemLiteralResult.execute
> (ElemLiteralResult.java:681)
> It appeared that some RTF (result tree fragment) processing was failing while evaluating var13.
> Investigation showed that this failure occured due to an earlier null pointer exception in:
> org.apache.xml.utils.XMLReaderManager.releaseXMLReader(reader);
> The problem occurs when reader is null, and the code throws a null pointer exception when trying to remove null from the Hashtable. My program works fine if the body of that method has this statement:
> if (m_readers.get() == reader)
> {
> m_inUse.remove(reader);
> }
> changed to:
> if (m_readers.get() == reader && reader != null)
> {
> m_inUse.remove(reader);
> }
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