Work-around to: Unable to find the mojo 'org.apache.maven.plugins:maven-dependency-plugin:2.0-alpha-1:copy-dependencies'
[INFO] Internal error in the plugin manager executing goal 'org.apache.maven.plugins:maven-dependency-plugin:2.0-alpha-1:copy-dependencies':Then you are not alone. I did too :-) But, after some debugging, I found it to be due to a multi module build of mine, where the first built module had a plugin that internally depended upon version 2.0-alpha-1 of the maven-dependency-plugin, and a later plugin not being compatible with that version.
Unable to find the mojo 'org.apache.maven.plugins:maven-dependency-plugin:2.0-alpha-1:copy-dependencies'
in the plugin 'org.apache.maven.plugins:maven-dependency-plugin'
Component descriptor cannot be found in the component repository:
Luckily, both plugins that depended upon the maven-dependency-plugin could work with version 2.0-alpha-4 instead, so doing the following in my top-level pom worked around the problem: