Eclipse m2e plugin seems to require org.eclipse.jem.util 0.0.0

Question

I try to install the M2E plugin for Eclipse Juno using Help > Install New Software and the update site, http://download.eclipse.org/technology/m2e/releases. When I try to install the 'Maven Integration for Eclipse' I get the following message:

Cannot complete the install because one or more required items could not be found.
  Software being installed: m2e - Maven Integration for Eclipse 1.3.1.20130219-1424 (org.eclipse.m2e.feature.feature.group 1.3.1.20130219-1424)
  Missing requirement: m2e - Maven Integration for Eclipse 1.3.1.20130219-1424
  (org.eclipse.m2e.feature.feature.group 1.3.1.20130219-1424) requires
  'org.eclipse.jem.util 0.0.0' but it could not be found

How can I avoid this error and install the M2E plugin?

Answer 1

This problem was caused by my installation directory for Eclipse not being writable. It was a fresh unconfigured out of the box install, and I had installed it under /opt/eclipse on Linux. However, Eclipse expects to write to configuration and p2 subdirectories of the installation directories unless configured otherwise, and it won't give any obvious error if these are not available to write to.

You can avoid this error by ensuring your user can write to the installation directory of Eclipse.