Yes it is possible. Instead of catching an Exception you can do anything
else, e.g.
try {
...}
catch (MyException e) {
System.err.prinltn(e.class.forName());
}
But this is off-topic here, it�s an gereral question about java.
Michael
-----Urspr�ngliche Nachricht-----
Von: G�nter Kukies [mailto:[EMAIL PROTECTED]
Gesendet: Montag, 24. Februar 2003 17:52
An: Lucene Users List
Betreff: Re: IndexWriter addDocument NullPointerException
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?
G�nter
----- Original Message -----
From: "Otis Gospodnetic" <[EMAIL PROTECTED]>
To: "Lucene Users List" <[EMAIL PROTECTED]>
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
>
>
> --- G�nter_Kukies <[EMAIL PROTECTED]> 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.
> >
> >
> > G�nter
> >
> > ----- Original Message -----
> > From: "Otis Gospodnetic" <[EMAIL PROTECTED]>
> > To: "Lucene Users List" <[EMAIL PROTECTED]>
> > 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);
> > > }
> > >
> > >
> > > --- G�nter_Kukies <[EMAIL PROTECTED]> 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:[EMAIL PROTECTED]>
> > > > Unindexed<email:[EMAIL PROTECTED]> Unindexed<name:Hans Dampf>
> > > > Text<summary:Equipo de deteccion 2002> Text<title:Equipo de
> > deteccion
> > > > 2002>
> > > > Text<doctypeid:0001> Unindexed<lifetime:0>
> > > > [EMAIL PROTECTED]
> > 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> [EMAIL PROTECTED]
> > > >
> > >
> >
>
Unindexed<relative_path:documents/news_new/sub1/sub11/sub111/1045735974680_0
> > > > 001_hda.pdf>>
> > > > java.lang.NullPointerException
> > > > hallo2
> > > > hallo1 Document<Text<contents:[EMAIL PROTECTED]>
> > > > Unindexed<email:[EMAIL PROTECTED]> Unindexed<name:Hans Dampf>
> > > > Text<summary:testsummary> Text<title:testtitle>
> > Text<doctypeid:0001>
> > > > Unindexed<lifetime:0> [EMAIL PROTECTED]
> > > > 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> [EMAIL PROTECTED]
> > > >
> > >
> >
>
Unindexed<relative_path:documents/news_new/sub1/sub11/sub111/1045735974850_0
> > > > 001_hda.pdf>>
> > > > java.lang.NullPointerException
> > > > hallo2
> > > >
> > > > G�nter
> > > >
> > > > ----- Original Message -----
> > > > From: "Tatu Saloranta" <[EMAIL PROTECTED]>
> > > > To: "Lucene Users List" <[EMAIL PROTECTED]>
> > > > Sent: Saturday, February 22, 2003 5:32 PM
> > > > Subject: Re: IndexWriter addDocument NullPointerException
> > > >
> > > >
> > > > > On Friday 21 February 2003 13:22, G�nter 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,
> > > > > >
> > > > > > G�nter
> > > > > >
> > > > > > > On Friday 21 February 2003 05:33, G�nter 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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