Re: jsp - newbie problem: java.lang.NoClassDefFoundError

From:

"Andrew Thompson" <u32984@uwe>

Newsgroups:

comp.lang.java.help

Date:

Sat, 06 Oct 2007 17:19:20 GMT

Message-ID:

<794b73dc416a4@uwe>

Daniel Khan wrote:
...

I am trying to create a jsp which accesses a class which accesses a
lucene index.
When I develop an run the project locally using eclipse everything
works fine.

As soon as I deploy the war file to my debian host and try to access
the page I get following exception:

It seems something is on the classpath of eclipse, that
is not yet* on the classpath of the web app.

* If the files have only just been deployed, the server
might need to be refreshed before it recognises their
availability.

SEVERE: Servlet.service() for servlet jsp threw exception
java.lang.NoClassDefFoundError

(big snip..)

Was there more to the stacktrace? I ask because the
name ..

The line which causes the error is Directory dir =
FSDirectory.getDirectory(indexDir);

..'FSDirectory' does not appear anywhere in it.

So it seems as if FSDirectory can't be found but I have the lucene jar
file inside the webapps lib directory and it also works on eclipse.
Inside the class I have
import org.apache.lucene.store.*;

It seems as if the class has another context and path as the jsp and
has no access to the jar files inside /lib. ...

A JSP (or Servlet) usually *would* have access to both
the lib and classes directories. Try refreshing the server.

--
Andrew Thompson
http://www.athompson.info/andrew/

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