Error: Could not find or load main class org.codehaus.plexus.classworlds.launcher.Launcher

Question

I have installed a latest maven-3.2.5 on Linux Mint Throgh CLi The installation details are as follows:

export JAVA_HOME=/usr/lib/jvm/java-7-openjdk-amd64/
export M2_HOME=/home/mani/apache-maven-3.2.5/bin/

In the command it shows it like this:

mani@manithullimilli ~/apache-maven-3.2.5/bin $ ./mvn version

Error: Could not find or load main class org.codehaus.plexus.classworlds.launcher.Launcher mani@manithullimilli ~/apache-maven-3.2.5/bin $

I Have Setted Path Also

Answer 1

You mentioned M2_HOME environment variable incorrectly.M2_HOME environment variable should be "/home/mani/apache-maven-3.2.5"

export M2_HOME=/home/mani/apache-maven-3.2.5

and Add the $M2_HOME/bin directory to your path.

Answer 2

There might be an export somewhere you are not aware of.

Check all places where environment variables are defined, e.g.

    /etc/environment
    ~/.bashrc
    ~/.mavenrc

In my case .mavenrc was pointing to my old maven's home, I deleted it and everything worked as expected.

Answer 3

I had the same issue, installed maven, everything was correct but was still getting "could not find class" error.

After I ran : source /etc/environment

everything worked after that. It might help.

Answer 4

In my case:

For some reason CLASSWORLDS_JAR system variable was empty.

This worked for me:

Defined this system variable with value %MAVEN_HOME%\boot\plexus-classworlds-2.5.2,