Remote debugging doesn't work in Netbeans 3.4. This bug 
should be fixed with highest priority and released in a Q-
Build, and 3.4.1 too. 

I had a discussion in the forum and alot of people were 
having problems with remote debugging as I was having.

So I am explaining the steps that I am doing to help u 
reproduce the problem.

My Environment
==============
Windows 2000
JDK 1.4.1
Netbeans 3.4
Tomcat 4.1.2 installed on C drive
Project Source Code on D drive

1)I compile my servlet class using ant (with debugging 
information turned on)

2) Then I deploy the .war file in the Tomcat 4.1.2 webapps 
folder. 

3) I start Tomcat 4.1.2 in debug mode using the following 
string all in one line
-Xdebug -Xnoagent -
Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=1
2999

4) The .war file then gets extracted automatically with 
appropiate web folder structure.
Hello -> WEB-INF -> classes -> HelloWorld.class
the web.xml file is located right under the WEB-INF folder

5) Now I attach the debugger using a socket Connector
(dt_socket)
 with the following values
 Host: "sagi" (name of my computer)
 Port: "12999"

6) After attaching the debugger, my debugger Console 
displays the following message...

  Connecting to sagi:12999
  Connection established

and the "Finish" option under the Debug menu is enabled.

So this proves that my debugger is attached properly.

6) In my java source file (HelloWorld.java) I have 
breakpoints on simple line which has the following code
 out.println("<font face = 'arial' size = '2'>Hello, what 
a nice World</font><br />");

Now when I call the Helloworld.class from my browser, the 
browser doesn't display anything, but the browser icon
on the right hand corner keeps on spinning, making me feel 
that the debugger hit the breakpoint.

But when I check Netbeans, I see something really wierd.

I get this message on on my debugger console mentioning

"Breakpoint reached at line ? in class HelloWorld by 
thread Thread-5."

There should be an arrow right next to where I have set my 
breakpoint, but there is no arrow. The editor doesn't 
highlight the line that I have set the break point either.

I have also checked that my breakpoints have their status 
set to "enabled"

I get this message when I want to step over.
"Source of class has not been found in mounted 
filesystems."

My Project source code is in D drive (which contains the 
break points), and Tomcat is running on C drive. The 
generated .class file is in C drive in Tomcat 4.1.2 
webapps folder. There is nothing wrong in my folder 
structure cause when I run the execute the servlet in 
normal mode, everything runs fine.

Now I tried remote debugging this same servlet using 
IntelliJ IDEA, and Jbuilder using the the exact steps, and 
both of them worked fine. 
It seems that Netbeans has severe bug in Remote Debugging. 
Please fix this and make it available in Q-build and in 
Netbeans 3.4.1. I am having lots of difficulties cause I 
cannot perform remote debugging.

Ana von Klopp suggested me to attach my ant file..
So here it is.

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE project SYSTEM "antstructure.dtd" >
<project name="HelloWorld Project" basedir="." 
default="buildApp">

    <!-- ============== -->
    <!-- Global Properties  -->
    <!-- ============== -->
    <!-- home.dir property -->
    <property name="home.dir" value="${basedir}"/>
    <!-- src.dir property -->
    <property name="src.dir" value="${home.dir}\src"/>
    <!-- build.dir property -->
    <property name="output.dir" value="${home.dir}
\classes"/>
    <!-- lib.dir property -->
    <property name="lib.dir" value="${home.dir}\lib"/>
    <!-- build.dir property -->
    <property name="build.dir" value="${home.dir}
\defaultroot"/>
    <!-- dist.dir property -->
    <property name="dist.dir" value="${home.dir}\dist"/>

    <!-- ======= -->
    <!-- init target -->
    <!-- ======= -->
    <target name="init" description="">
        <!-- Display Ant version -->
        <echo><![CDATA[ ${TODAY}]]></echo>
        <echo><![CDATA[ Build tool: ${ant.version} ]]
></echo>
        <!-- Display Project Directory Information -->
        <echo><![CDATA[ Project Home directory: 
${home.dir} ]]></echo>
        <echo><![CDATA[ Project Source directory: 
${src.dir} ]]></echo>
        <echo><![CDATA[ Project Lib directory: 
${lib.dir} ]]></echo>
        <!-- Create Timestamp -->
        <tstamp/>
    </target>

    <!-- =========== -->
    <!-- clean target -->
    <!-- =========== -->
    <target name="clean" description="delete all generated 
files">
        <echo><![CDATA[ Delete all generated class  
files ]]></echo>
        <delete dir="${output.dir}"/>
        <echo><![CDATA[ Delete defaultroot directory ]]
></echo>
        <delete dir="${build.dir}"/>
        <echo><![CDATA[ Delete dist directory ]]></echo>
        <delete dir="${dist.dir}"/>
    </target>

    <!-- =========== -->
    <!-- prepare target -->
    <!-- =========== -->
    <target name="prepare" description="create output 
directory">
        <mkdir dir="${output.dir}"/>
    </target>

    <!-- =========== -->
    <!-- compile target -->
    <!-- =========== -->
    <target name="compile" depends="init,  prepare" 
description="compile all
source file">
        <javac srcdir="${src.dir}" destdir="${output.dir}" 
debug="on">
            <classpath>
                <pathelement 
location="${lib.dir}/servlet.jar"/>
            </classpath>
        </javac>
    </target>

    <!-- ============ -->
    <!-- buildApp target -->
    <!-- ============ -->
    <target name="buildApp" depends="compile" 
description="build the
Application">
        <mkdir dir="${build.dir}" description="create 
application root
directory"/>
        <mkdir dir="${build.dir}/WEB-INF" 
description="create WEB-INF
directory "/>
        <mkdir dir="${build.dir}/WEB-INF/classes" 
description="create the
WEB-INF/classes directory"/>
        <copy todir="${build.dir}/WEB-INF/classes" 
description="copy the
application's class files to the WEB-INF/classes 
directory">
            <fileset dir="${output.dir}" 
includes="**/*.class"/>
        </copy>
        <mkdir dir="${build.dir}/WEB-INF/src" 
description="create the
WEB-INF/src directory"/>
        <copy todir="${build.dir}/WEB-INF/src" 
description="copy the
application's source  files to the WEB-INF/src directory">
            <fileset dir="${src.dir}" 
includes="**/*.java"/>
        </copy>
        <mkdir dir="${build.dir}/WEB-INF/lib" 
description="create the
WEB-INF/lib directory"/>
        <copy todir="${build.dir}/WEB-INF/lib" 
description="copy the
application's jar  files to the WEB-INF/lib directory">
            <fileset dir="${lib.dir}" 
excludes="servlet.jar"/>
        </copy>
    </target>


    <!-- =========== -->
    <!-- DIST TARGET  -->
    <!-- =========== -->
    <target name="dist" depends="buildApp" 
description="generate the archive
for the distribution">
        <mkdir dir="${dist.dir}"/>

        <war warfile="${dist.dir}/HelloWorld.war" 
basedir="${build.dir}"
includes="**" webxml="${home.dir}/web.xml"/>
    </target>


    <target name="deploy" description="deploy">
        <!-- Copy war to server here -->
        <copy file="${dist.dir}/HelloWorld.war"
todir="C:\tomcat-4.1.x\webapps" />
            </target>

</project>