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[jira] Created: (XERCESJ-1260) DTDGrammar is not thread-safe, but needs to : msg#00017

Subject: [jira] Created: (XERCESJ-1260) DTDGrammar is not thread-safe, but needs to be in order to work with grammar pools. 
DTDGrammar is not thread-safe, but needs to be in order to work with grammar 
pools.
-----------------------------------------------------------------------------------

                 Key: XERCESJ-1260
                 URL: https://issues.apache.org/jira/browse/XERCESJ-1260
             Project: Xerces2-J
          Issue Type: Bug
          Components: DTD
    Affects Versions: 2.9.0
            Reporter: Michael Glavassevich


If a DTDGrammar is pre-parsed and stored in an XMLGrammarPool which is shared 
across parsers running in different threads, it's possible that the content 
model builder will fail with one of the exceptions below.  The 
createChildModel() needs to be synchronized (like analagous method in CMBuilder 
for SchemaGrammars).

java.lang.NullPointerException
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.buildDFA(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.<init>(DFAContentModel.java:215)
        at 
org.apache.xerces.impl.dtd.DTDGrammar.createChildModel(DTDGrammar.java:2271)
        at 
org.apache.xerces.impl.dtd.DTDGrammar.getElementContentModelValidator(DTDGrammar.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.DTDGrammar.getElementDecl(DTDGrammar.java(Compiled 
Code))
        at 
org.apache.xerces.impl.dtd.XMLDTDValidator.checkContent(XMLDTDValidator.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.XMLDTDValidator.handleEndElement(XMLDTDValidator.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.XMLDTDValidator.endElement(XMLDTDValidator.java(Compiled
 Code))
        at 
org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanEndElement(XMLNSDocumentScannerImpl.java(Compiled
 Code))
        at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(XMLDocumentFragmentScannerImpl.java(Compiled
 Code))
        at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java(Compiled
 Code))
        at 
org.apache.xerces.parsers.XML11Configuration.parse(XML11Configuration.java(Compiled
 Code))
        at 
org.apache.xerces.parsers.XML11Configuration.parse(XML11Configuration.java(Compiled
 Code))
        at org.apache.xerces.parsers.XMLParser.parse(XMLParser.java(Inlined 
Compiled Code))
        at 
org.apache.xerces.parsers.AbstractSAXParser.parse(AbstractSAXParser.java(Compiled
 Code))

java.lang.ArrayIndexOutOfBoundsException: 115
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.postTreeBuildInit(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.buildDFA(DFAContentModel.java(Compiled
 Code))
        at 
org.apache.xerces.impl.dtd.models.DFAContentModel.<init>(DFAContentModel.java:215)
        at 
org.apache.xerces.impl.dtd.DTDGrammar.createChildModel(DTDGrammar.java:2271)
        at 
org.apache.xerces.impl.dtd.DTDGrammar.getElementContentModelValidator(DTDGrammar.java:1735)
        at 
org.apache.xerces.impl.dtd.DTDGrammar.getElementDecl(DTDGrammar.java:1237)
        at 
org.apache.xerces.impl.dtd.XMLDTDValidator.checkContent(XMLDTDValidator.java:1689)
        at 
org.apache.xerces.impl.dtd.XMLDTDValidator.handleEndElement(XMLDTDValidator.java:2024)
        at 
org.apache.xerces.impl.dtd.XMLDTDValidator.endElement(XMLDTDValidator.java:923)
        at 
org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanEndElement(XMLNSDocumentScannerImpl.java:673)
        at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(XMLDocumentFragmentScannerImpl.java:1645)
        at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:324)
        at 
org.apache.xerces.parsers.XML11Configuration.parse(XML11Configuration.java:845)
        at 
org.apache.xerces.parsers.XML11Configuration.parse(XML11Configuration.java:768)
        at org.apache.xerces.parsers.XMLParser.parse(XMLParser.java:108)
        at 
org.apache.xerces.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1127)

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Previous by Date:  [jira] Commented: (XERCESJ-1248) Static textNode on AttrImpl breaks thread-safety, mutations of independant documents from within a mutation listener, and introduces potential memory leaks, Randall Theobald (JIRA)
Next by Date:  [jira] Assigned: (XERCESJ-1260) DTDGrammar is not thread-safe, but needs to be in order to work with grammar pools., Michael Glavassevich (JIRA)
Previous by Thread:  [jira] Commented: (XERCESJ-1248) Static textNode on AttrImpl breaks thread-safety, mutations of independant documents from within a mutation listener, and introduces potential memory leaks, Randall Theobald (JIRA)
Next by Thread:  [jira] Assigned: (XERCESJ-1260) DTDGrammar is not thread-safe, but needs to be in order to work with grammar pools., Michael Glavassevich (JIRA)
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