It's all about the answers!

Ask a question

Maven Build in Rational - NoClassDefFoundError: org.codehaus.classworlds.Launcher

Tommy Ng (2123) | asked Feb 18 '13, 9:02 a.m.
edited Feb 20 '13, 8:28 a.m. by Spencer Murata (2.3k115971)

Dear Sir

When I use the Maven Build in Rational, I got below error

[Jazz build engine] Invoking build participant ""

Ecveption in thread "main" java.langNoClassDefFoundError: org.codehaus.classworlds.Launcher

Can anyone know it?

5 answers

permanent link
Ian Wark (79713553) | answered Feb 19 '13, 10:51 p.m.
Hi Tommy,

I also get the same error. Here is what I get:

2013-02-19 14:58:14 [Jazz build engine] running on host: XXXXXXX
2013-02-19 14:58:14 [Jazz build engine] Should build occur?
2013-02-19 14:58:14 [Jazz build engine] Yes: Always build a user initiated request.
2013-02-19 14:58:14 [Jazz build engine] Invoking build participant ""
Exception in thread "main" java.lang.NoClassDefFoundError : org.codehaus.classworlds.Launc her
Caused by: java.lang.ClassNotFoundExcepti on: org.codehaus.classworlds.Launc her
    at ass(
    at java.lang.ClassLoader.loadClas s(
    at sun.misc.Launcher$AppClassLoad er.loadClass(
    at java.lang.ClassLoader.loadClas s(
Could not find the main class: org.codehaus.classworlds.Launc her.  Program will exit.
Build failed. Exit value was 1.

It seems that the C:\Program Files\Apache Software Foundation\apache-maven-3.0.4\ boot\plexus-classworlds-2.4.ja r is not in classpath, but building from Maven and not Eclipse client works fine. We tried adding -cp "C:\Program Files\Apache Software Foundation\apache-maven-3.0.4\ boot\plexus-classworlds-2.4.ja r" to the Java VM arguments section in build definition, but this did not seem to resolve issue.

<Reproduce steps>
1. Download Windows Maven v3.0.4 from and add environment variables carefully as per instructions.
2. Create the sample using steps under
3. Unzip the build feature RTC-BuildSystem-Toolkit-Win-4. and copy jdk from RTC 4.0.1 Eclipse client as per instructions
4. Create a build definition for Maven in RTC project area and configure as per screen captures.
5. Click "Create" button in Overview section to create a build engine.
6. Run jbe -vm {path_to_jdk}/bin/java -repository {repositoryURL} -userId {user} -pass {password} -engineId {engine}
7. Copy the sample maven project to your configured build workspace.
8. Invoke a build from the Builds view.

Can someone help?

permanent link
Ian Wark (79713553) | answered Feb 19 '13, 10:56 p.m.
There is only one screen capture. Here it is.

Build definition

permanent link
Spencer Murata (2.3k115971) | answered Feb 20 '13, 8:34 a.m.
 It appears that this is a problem with mixing Maven 2 scripts with a Maven 3 engine.

or a missing classworlds jar from the path:

Does the same Maven script run from the command line without problems?


permanent link
Ian Wark (79713553) | answered Feb 20 '13, 10:06 p.m.

OK. I succeeded in the build. The key was to remove the \bin from the end of the Maven home: variable in the build definition settings.

"C:\Program Files\Apache Software Foundation\apache-maven-3.0.4".

I also changed my Project location: to include \my-app a the end.. which makes


I am using the amy-app pplication generated from which is a good sample application. I advise to use this application to test.

permanent link
Joseph Mao (440189) | answered Feb 20 '13, 11:37 p.m.
In Maven build definition,
- "Maven home" need to set to [Maven_installed_folder], rather than [Maven_installed_folder]\bin, to allow maven library can be found
- "Project Location" need to be set to project path level, allow Maven to find pom.xml, rahter than workspace level.

Your answer

Register or to post your answer.

Dashboards and work items are no longer publicly available, so some links may be invalid. We now provide similar information through other means. Learn more here.