• Make sure you are using Maven 1.0.
  • Delete all of the .cache files from your {${USER_HOME}/.maven/plugins} directory.
  • Delete all of the jars from {${USER_HOME}/.maven/repository/*/jars} where * is:
  • jetspeed2
  • pluto
  • picocontainer
  • nanocontainer
  • proxytoys
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