 | | | Resolved: (XERCESJ-977) Null pointer exception during DOM parsing | Resolved: (XERCESJ-977) Null pointer exception during DOM parsing 2007-02-23 - By Michael Glavassevich (JIRA)
[ https://issues.apache.org/jira/browse/XERCESJ-977?page=com.atlassian
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Michael Glavassevich resolved XERCESJ-977.
------------------------------------------
Resolution: Fixed
I've just committed a fix to SVN. If a chunk gets deleted and we need to write
to it again in the future we now re-create it. I realize this will churn the
garbage collector a bit. There's probably a more performant solution but this
seemed like the safest thing to do given the stability of the rest of the
deferred DOM implementation.
> Null pointer exception during DOM parsing
> -----------------------------------------
>
> Key: XERCESJ-977
> URL: https://issues.apache.org/jira/browse/XERCESJ-977
> Project: Xerces2-J
> Issue Type: Bug
> Components: DOM (Level 3 Core)
> Affects Versions: 2.6.2
> Reporter: Emily Horton
> Assigned To: Michael Glavassevich
> Attachments: event_catalog.dtd, x6.xml
>
>
> We are parsing large numbers of xml files with DOM and are very occasionally
getting a null pointer exception when parsing. In this case we tracked the
problem down to a point in the text where there was a quoted attribute inside
quoted text:
> “[a]nimals should be housed in facilities dedicated to or assigned for
that purpose...<bibr rid="b2"/>”
> Any of the following changes to the document would get rid of the null
pointer exception and allow parsing:
> 1) Changing the bibr tag to a different without any attributes.
> 2) Removing the outside quotes.
> 3) Moving the bibr tag to outside the quotes.
> Here is the stack trace for the error:
> 522316528 [Thread-200] ERROR -> org.apache.xerces.dom.DeferredDocumentImpl
.setChunkIndex(Unknown Source)
> 522316529 [Thread-200] ERROR -> org.apache.xerces.dom.DeferredDocumentImpl
.insertBefore(Unknown Source)
> 522316529 [Thread-200] ERROR -> org.apache.xerces.parsers.AbstractDOMParser
.endGeneralEntity(Unknown Source)
> 522316529 [Thread-200] ERROR -> org.apache.xerces.impl.dtd.XMLDTDValidator
.endGeneralEntity(Unknown Source)
> 522316529 [Thread-200] ERROR -> org.apache.xerces.impl
.XMLDocumentFragmentScannerImpl.endEntity(Unknown Source)
> 522316530 [Thread-200] ERROR -> org.apache.xerces.impl.XMLDocumentScannerImpl
.endEntity(Unknown Source)
> 522316530 [Thread-200] ERROR -> org.apache.xerces.impl.XMLEntityManager
.endEntity(Unknown Source)
> 522316530 [Thread-200] ERROR -> org.apache.xerces.impl.XMLEntityScanner.load
(Unknown Source)
> 522316530 [Thread-200] ERROR -> org.apache.xerces.impl.XMLEntityScanner
.scanContent(Unknown Source)
> 522316530 [Thread-200] ERROR -> org.apache.xerces.impl
.XMLDocumentFragmentScannerImpl.scanContent(Unknown Source)
> 522316530 [Thread-200] ERROR -> org.apache.xerces.impl
.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown
Source)
> 522316530 [Thread-200] ERROR -> org.apache.xerces.impl
.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
> 522316531 [Thread-200] ERROR -> org.apache.xerces.parsers.XML11Configuration
.parse(Unknown Source)
> 522316531 [Thread-200] ERROR -> org.apache.xerces.parsers.DTDConfiguration
.parse(Unknown Source)
> 522316531 [Thread-200] ERROR -> org.apache.xerces.parsers.XMLParser.parse
(Unknown Source)
> 522316531 [Thread-200] ERROR -> org.apache.xerces.parsers.DOMParser.parse
(Unknown Source)
> 522316531 [Thread-200] ERROR -> org.apache.xerces.jaxp.DocumentBuilderImpl
.parse(Unknown Source)
> 522316531 [Thread-200] ERROR -> javax.xml.parsers.DocumentBuilder.parse
(Unknown Source)
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