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From Patrick Diviacco <patrick.divia...@gmail.com>
Subject Re: [digester] java.lang.NullPointerException only for a specific file
Date Mon, 28 Mar 2011 14:56:54 GMT
hi!

What should I use instead of StringBuffer ?

Any example or tutorial ?

thanks
Patrick

On 28 March 2011 16:53, Simone Tripodi <simonetripodi@apache.org> wrote:

> Hi Patrick,
> nice to know you quickly fixed the issue before anybody could have
> provided his help! :)
>
> As a side note, I would suggest you taking in consideration a
> different solution for the XML generation rather the StringBuffer,
> since you're parsing large dataset, streaming data while parsing
> would improve the performances and reduce the consumed memory.
>
> Just my 2 cents, have a nice day,
> Simo
>
> http://people.apache.org/~simonetripodi/
> http://www.99soft.org/
>
>
>
> On Mon, Mar 28, 2011 at 2:28 PM, Patrick Diviacco
> <patrick.diviacco@gmail.com> wrote:
> > I've solved. the issue was a row in train.xml file. To solve the issue
> I've
> > printed the source file rows while processing. However it has been
> possible
> > only because the parsing takes 4 minutes.
> >
> > I'm wondering how to debug such issues with a much bigger text file.
> >
> > thanks
> >
> > On 28 March 2011 14:14, Patrick Diviacco <patrick.diviacco@gmail.com>
> wrote:
> >
> >> And these are the files:
> >>
> >> http://dl.dropbox.com/u/72686/test.xml
> >>
> >> http://dl.dropbox.com/u/72686/train.xml
> >>
> >> thanks
> >>
> >>
> >> On 28 March 2011 14:13, Patrick Diviacco <patrick.diviacco@gmail.com
> >wrote:
> >>
> >>> Hi,
> >>>
> >>> I've a 74MB xml document and I've split it into 2 docs:52MB and 22MB
> >>> respectively.
> >>>
> >>> I'm parsing the file using common Digester library, and everything
> works
> >>> perfectly for the small file, but I  get a NullPointerExceptio with the
> big
> >>> one.
> >>>
> >>> I don't think the issue is the code because it works for the small
> file...
> >>> I guess the problem is with the file itself.
> >>>
> >>> I've parsed the files with the same parser, so I don't think the files
> >>> have issues either.
> >>>
> >>> In conclusion I dunno where the issue is. This is the code:
> >>> http://pastie.org/1726063
> >>>
> >>> This is the exception
> >>> SEVERE: End event threw exception
> >>> java.lang.reflect.InvocationTargetException
> >>> at sun.reflect.GeneratedMethodAccessor7.invoke(Unknown Source)
> >>> at
> >>>
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> >>>  at java.lang.reflect.Method.invoke(Method.java:597)
> >>> at
> >>>
> org.apache.commons.beanutils.MethodUtils.invokeMethod(MethodUtils.java:216)
> >>>  at org.apache.commons.digester.SetNextRule.end(SetNextRule.java:220)
> >>> at org.apache.commons.digester.Rule.end(Rule.java:257)
> >>>  at org.apache.commons.digester.Digester.endElement(Digester.java:1345)
> >>> at
> >>>
> com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(AbstractSAXParser.java:601)
> >>>  at
> >>>
> com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(XMLDocumentFragmentScannerImpl.java:1782)
> >>> at
> >>>
> com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2938)
> >>>  at
> >>>
> com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:648)
> >>> at
> >>>
> com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:511)
> >>>  at
> >>>
> com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:808)
> >>> at
> >>>
> com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:737)
> >>>  at
> >>>
> com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:119)
> >>> at
> >>>
> com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1205)
> >>>  at
> >>>
> com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:522)
> >>> at org.apache.commons.digester.Digester.parse(Digester.java:1871)
> >>>  at CentroidGenerator.main(CentroidGenerator.java:137)
> >>> Caused by: java.lang.NullPointerException
> >>> at CentroidGenerator.nextItem(CentroidGenerator.java:62)
> >>>  ... 19 more
> >>> Exception in thread "main" java.lang.NullPointerException
> >>> at
> >>>
> org.apache.commons.digester.Digester.createSAXException(Digester.java:3363)
> >>>  at
> >>>
> org.apache.commons.digester.Digester.createSAXException(Digester.java:3389)
> >>> at org.apache.commons.digester.Digester.endElement(Digester.java:1348)
> >>>  at
> >>>
> com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(AbstractSAXParser.java:601)
> >>> at
> >>>
> com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(XMLDocumentFragmentScannerImpl.java:1782)
> >>>  at
> >>>
> com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2938)
> >>> at
> >>>
> com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:648)
> >>>  at
> >>>
> com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:511)
> >>> at
> >>>
> com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:808)
> >>>  at
> >>>
> com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:737)
> >>> at
> >>>
> com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:119)
> >>>  at
> >>>
> com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1205)
> >>> at
> >>>
> com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:522)
> >>>  at org.apache.commons.digester.Digester.parse(Digester.java:1871)
> >>> at CentroidGenerator.main(CentroidGenerator.java:137)
> >>> Caused by: java.lang.NullPointerException
> >>> at CentroidGenerator.nextItem(CentroidGenerator.java:62)
> >>> at sun.reflect.GeneratedMethodAccessor7.invoke(Unknown Source)
> >>>  at
> >>>
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> >>> at java.lang.reflect.Method.invoke(Method.java:597)
> >>>  at
> >>>
> org.apache.commons.beanutils.MethodUtils.invokeMethod(MethodUtils.java:216)
> >>> at org.apache.commons.digester.SetNextRule.end(SetNextRule.java:220)
> >>>  at org.apache.commons.digester.Rule.end(Rule.java:257)
> >>> at org.apache.commons.digester.Digester.endElement(Digester.java:1345)
> >>>  ... 12 more
> >>>
> >>> thanks
> >>>
> >>
> >>
> >
>
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