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From Günter Kukies <guenter.kuk...@heuft.com>
Subject Re: IndexWriter addDocument NullPointerException
Date Mon, 24 Feb 2003 16:52:13 GMT
I switched off the -server switch from the java commandline options and
everything works fine now.
I changed nothing in my code.

So is it principly possible to throw an Exception with not stack trace?

Any comments about this phenomenon?

Günter


----- Original Message -----
From: "Otis Gospodnetic" <otis_gospodnetic@yahoo.com>
To: "Lucene Users List" <lucene-user@jakarta.apache.org>
Sent: Monday, February 24, 2003 4:31 PM
Subject: Re: IndexWriter addDocument NullPointerException


> If I were you I would make things simpler for myself by converting the
> code to something that I could run from the command line instead of
> having to go through Tomcat.
>
> You really need to capture your exception stack trace with lne numbers,
> and then we can try helping.
>
> Otis
>
>
> --- Günter_Kukies <guenter.kukies@heuft.com> wrote:
> > log("doc: "+doc); is handled by tomcat and directed into special
> > log-files,
> > so you can't see them.
> >
> > > >                 System.err.println("hallo1 "+doc);
> > > >                 ex.printStackTrace();
> > > >                 System.err.println("hallo2");
> > this is printing the relevant output.
> >
> > doc is never null, writer is never null and I can't add null-fields
> > to a
> > document.
> >
> >
> > Günter
> >
> > ----- Original Message -----
> > From: "Otis Gospodnetic" <otis_gospodnetic@yahoo.com>
> > To: "Lucene Users List" <lucene-user@jakarta.apache.org>
> > Sent: Monday, February 24, 2003 3:07 PM
> > Subject: Re: IndexWriter addDocument NullPointerException
> >
> >
> > > My guess is that your 2 getDocument calls are the source, that is,
> > that
> > > those PDF and TXT classes don't return a proper Document.
> > > I also don't see the output created by log("doc: "+doc);
> > >
> > > Otis
> > >
> > >
> > >         if(path.matches("\\d+_\\d{4}_[a-z]{2,3}\\.pdf")) {
> > >             doc =
> > PDF_Document_Parser.getDocument(this,RealPath,file);
> > >         }
> > >         else if(path.matches("\\d+_\\d{4}_[a-z]{2,3}\\.txt")) {
> > >             doc =
> > TXT_Document_Parser.getDocument(this,RealPath,file);
> > >         }
> > >
> > >
> > > --- Günter_Kukies <guenter.kukies@heuft.com> wrote:
> > > > So, weekend is over.
> > > >
> > > > here is some code :
> > > >
> > > >    private void addDocument(IndexWriter writer, File file )
> > throws
> > > > IOException, InterruptedException {
> > > >         String path = file.getName();
> > > >         log( "-------------start Indexing:" + path );
> > > >         Document doc = null;
> > > >         if(path.matches("\\d+_\\d{4}_[a-z]{2,3}\\.pdf")) {
> > > >             doc =
> > > > PDF_Document_Parser.getDocument(this,RealPath,file);
> > > >         }
> > > >         else if(path.matches("\\d+_\\d{4}_[a-z]{2,3}\\.txt")) {
> > > >             doc =
> > > > TXT_Document_Parser.getDocument(this,RealPath,file);
> > > >         }
> > > >         else {
> > > >             log("do nothing");
> > > >         }
> > > >
> > > >         log("doc: "+doc);
> > > >         if( doc != null ) {
> > > >             try {
> > > >                 writer.addDocument(doc);
> > > >             }
> > > >             catch(Exception ex) {
> > > >                 System.err.println("hallo1 "+doc);
> > > >                 ex.printStackTrace();
> > > >                 System.err.println("hallo2");
> > > >                 log("ERROR writer.addDocument(doc);");
> > > >             }
> > > >         }
> > > >         else {
> > > >             log( "Skipping " + path );
> > > >         }
> > > >         log( "-------------end Indexing:" + path );
> > > >     }
> > > >
> > > >
> > > >
> > > > Here is the output:
> > > >
> > > > hallo1 Document<Text<contents:java.io.InputStreamReader@18a3a1d>
> > > > Unindexed<email:hansdampf@xxx.com> Unindexed<name:Hans Dampf>
> > > > Text<summary:Equipo de deteccion 2002> Text<title:Equipo de
> > deteccion
> > > > 2002>
> > > > Text<doctypeid:0001> Unindexed<lifetime:0>
> > > > org.apache.lucene.document.Field@1ed688f
> > Keyword<modified:0dcek766w>
> > > > Keyword<username:hda>
> > > >
> > >
> >
>
Unindexed<relative_path_xml:documents/news_new/sub1/sub11/sub111/10457359746
> > > > 80_0001_hda.xml>
> > > > Unindexed<category:documents/news_new/sub1/sub11/sub111/>
> > > > Keyword<search_all:all> org.apache.lucene.document.Field@16b98c3
> > > >
> > >
> >
>
Unindexed<relative_path:documents/news_new/sub1/sub11/sub111/1045735974680_0
> > > > 001_hda.pdf>>
> > > > java.lang.NullPointerException
> > > > hallo2
> > > > hallo1 Document<Text<contents:java.io.InputStreamReader@c12978>
> > > > Unindexed<email:hansdampf@xxx.com> Unindexed<name:Hans Dampf>
> > > > Text<summary:testsummary> Text<title:testtitle>
> > Text<doctypeid:0001>
> > > > Unindexed<lifetime:0> org.apache.lucene.document.Field@189c12a
> > > > Keyword<modified:0dcek76bm> Keyword<username:hda>
> > > >
> > >
> >
>
Unindexed<relative_path_xml:documents/news_new/sub1/sub11/sub111/10457359748
> > > > 50_0001_hda.xml>
> > > > Unindexed<category:documents/news_new/sub1/sub11/sub111/>
> > > > Keyword<search_all:all> org.apache.lucene.document.Field@e8c7db
> > > >
> > >
> >
>
Unindexed<relative_path:documents/news_new/sub1/sub11/sub111/1045735974850_0
> > > > 001_hda.pdf>>
> > > > java.lang.NullPointerException
> > > > hallo2
> > > >
> > > > Günter
> > > >
> > > > ----- Original Message -----
> > > > From: "Tatu Saloranta" <tatu@hypermall.net>
> > > > To: "Lucene Users List" <lucene-user@jakarta.apache.org>
> > > > Sent: Saturday, February 22, 2003 5:32 PM
> > > > Subject: Re: IndexWriter addDocument NullPointerException
> > > >
> > > >
> > > > > On Friday 21 February 2003 13:22, Günter Kukies wrote:
> > > > > > Hello,
> > > > > >
> > > > > > I don't have any line number.
> > > > >
> > > > > You unfortunately do need to know the line number, if you do
> > get an
> > > > exception
> > > > > and try to see where it occurs.
> > > > > Another less frequent problem is that you actually get the
> > > > exception as an
> > > > > object and print out that exception; in that case you would
> > just
> > > > see
> > > > > "java.lang.NullPointerException", and nothing else?
> > > > > Otherwise, based on your code, you should see a stack trace,
> > with
> > > > or
> > > > without
> > > > > line numbers. But you would at least see the method call stack,
> > > > which
> > > > would
> > > > > help in figuring out where problem occured.
> > > > >
> > > > > However, if you do catch an exception, and stack trace doesn't
> > have
> > > > line
> > > > > numbers (it seems that some JVMs do not have line number info
> > > > available
> > > > when
> > > > > running JIT'ed code) there are basically two ways to figure out
> > > > exact
> > > > > location:
> > > > >
> > > > > (1) Try to make JVM get the line number info (either running in
> > > > interpreted
> > > > >   mode; I think there was option, something like
> > '-Djava.compiler=
> > > > ' to
> > > > >   disable JIT?)
> > > > > (2) Run code in a debugger. One nice free debugger (if you are
> > not
> > > > using
> > > > an
> > > > >   IDE that has one is JSwat:
> > > > >      http://www.bluemarsh.com/java/jswat/
> > > > >
> > > > > Hope this helps,
> > > > >
> > > > > -+ Tatu +-
> > > > >
> > > > > >
> > > > > > this is the code snippet:
> > > > > >
> > > > > > Document doc;
> > > > > > IndexWriter writer;
> > > > > >
> > > > > > .....
> > > > > >
> > > > > > try{
> > > > > > writer.addDocument(doc);
> > > > > > }
> > > > > > catch(Exception ex){
> > > > > > ex.printStackTrace();
> > > > > > }
> > > > > >
> > > > > > this is the output on Standard.out:
> > > > > >
> > > > > > java.lang.NullPointerException
> > > > > >
> > > > > >
> > > > > > and nothing more.
> > > > > >
> > > > > > The doc is not null and System.out.println(doc) seems to be
> > ok.
> > > > There is
> > > > > > no difference between the working 80% and the not working 20%
> > > > doc's.
> > > > > > Thanks,
> > > > > >
> > > > > > Günter
> > > > > >
> > > > > > > On Friday 21 February 2003 05:33, Günter Kukies wrote:
> > > > > > >> Hello,
> > > > > > >>
> > > > > > >> writer.addDocument(doc) is throwing an
> > NullPointerException.
> > > > The
> > > > > > >> stacktrace from the catched Exception is only one line
> > > > > > >> "NullPointerException" without anything else. I open
the
> > > > IndexWriter
> > > > > > >> with create true. Run over the files in a Directory
and
> > add
> > > > all found
> > > > > > >> documents. After that i close the indexwriter. 80%
of the
> > > > documents
> > > > > > >> were added without problems. The rest gets that
> > > > NullPointerException.
> > > > > > >>
> > > > > > >> Any Ideas?
> > > > > > >
> > > > > > > Perhaps look at the line where the null pointer exception
> > is
> > > > thrown
> > > > and
> > > > > > > see  what happens? NullPointerException is thrown when
a
> > null
> > > > reference
> > > > > > > is being  de-referenced. Seeing the immediate cause should
> > be
> > > > easy,
> > > > > > > given line number.
> > > > > > >
> > > > > > > Perhaps you have added a field with null value? (just a
> > guess,
> > > > I don't
> > > > > > > know if  that's even illegal).
> > > > > > >
> > > > > > > -+ Tatu +-
>
>
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