Maven error : Could not find or load main class org.codehaus.plexus.classworlds.launcher.Launcher [duplicate]

Answer 1

I resolved the problem,it worked to me: delete the maven unzip file. and then get the newer one. then reconfig the path. because the original file was damaged. use mvn -v

Answer 2

What I did was I renamed (in my .bash_profile) the

export M2_HOME=/usr/local/bin/mvn
export M2=$M2_HOME/bin

to

export M3_HOME=/usr/local/bin/mvn
export M2=$M3_HOME/bin

and then used the command (thanks TS!)

$ which mvn

and

$ echo $M2_HOME

And I saw there is a different path in the both so I changed the $M2_HOME path to be the same as it showed me in the "Which mvn" command. In order to change this path I just edited the .bash_profile file where I had the variable.

Answer 3

Download the apache maven binary package not the source one, this way it can solve the issue of :

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

Answer 4

For absolute new people to maven, make sure you download the "Binary archives" from the Maven site, and not the "Source archives".

Answer 5

For what it's worth, I had the same error: the Could not find or load main class org.codehaus... thing, but without any other info (you'll find many people with this error message - but usually accompanied by extra info such as class loading failures).

It turns out I had a corrupted install, perhaps a some files silently failed to unzip or something. A rm -rf of the maven directory and re-download and unzipped fixed it.

Answer 6

Removing and re-installing worked for me.

Particulars:

• It had been about a year since I had run maven on this Linux machine.
• Java had been upgraded from 7 to 8 (but other changes have also occurred).
• My M2_HOME/M3_HOME was not defined (so clearing this wasn't a solution).
• Running the mvn script in debug (bash -x mvn) showed that the missing jar file was explicitly requested.
• I could only find an older version of the org.codehaus.plexus.classworlds package/module.

Since it wasn't clear how to independently update the org.codehaus jars, I let apt-get pull in what it needed. Problem solved.