Maven 2 & 3

Error when changing M2_HOME on linux (at least :) )

Details

  • Type: Bug Bug
  • Status: Closed Closed
  • Priority: Minor Minor
  • Resolution: Not A Bug
  • Affects Version/s: 3.0-alpha-7
  • Fix Version/s: None
  • Component/s: Class Loading, Command Line
  • Labels:
    None
  • Environment:
    Linux RH 5
  • Complexity:
    Intermediate
  • Number of attachments :
    0

Description

When I tried to change the value of M2_HOME directory, I get the following error

-bash-3.2$ mvn -v
Exception in thread "main" java.lang.NoClassDefFoundError: org/codehaus/plexus/classworlds/launcher/Launcher
Caused by: java.lang.ClassNotFoundException: org.codehaus.plexus.classworlds.launcher.Launcher
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:276)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)

My m2_home includes the same settings.xml
If I unset the m2_home, it's find :

-bash-3.2$ mvn -v
Apache Maven 3.0-alpha-7 (r921173; 2010-03-09 23:31:07+0100)
Java version: 1.6.0_07
Java home: /opt/sun/jdk1.6.0_07/jre
Default locale: en_US, platform encoding: UTF-8
OS name: "linux" version: "2.6.18-164.el5" arch: "amd64" Family: "unix"

Issue Links

is related to

Bug - A problem which impairs or prevents the functions of the product. MNG-4483 Maven 3 user directory is .m2 (be .mvn or something else?)

  • Major - Major loss of function.
  • Open - The issue is open and ready for the assignee to start work on it.

Activity

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Benjamin Bentmann added a comment -

You can't mix the mvn run script and the M2_HOME var from different Maven major versions. If you point M2_HOME at a 2.x installation, the 3.x run script won't work and vice versa.

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Benjamin Bentmann added a comment - You can't mix the mvn run script and the M2_HOME var from different Maven major versions. If you point M2_HOME at a 2.x installation, the 3.x run script won't work and vice versa.
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olivier o added a comment -

Thanks for the quick answer. It's make sense M2_HOME related to maven2 and M3_HOME to maven 3...

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olivier o added a comment - Thanks for the quick answer. It's make sense M2_HOME related to maven2 and M3_HOME to maven 3...

People

  • Assignee:
    Benjamin Bentmann
    Reporter:
    olivier o
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Dates

  • Created:
    Updated:
    Resolved: