Eclipse Juno Not Loading - stuck on 'org.eclipse.m2e,core'

Question

I was working fine with an Eclipse Juno on a Maven java project - all hunky-dory for couple of weeks.

Yesterday, just before leaving for home, I ran 'mvn clean' and 'mvn install' on the command line for the project (all good). I did not try opening Eclipse after running 'mvn' on said project from the command line.

This morning opening Eclipse Juno does not work - it stalls on loading 'org.eclipse.m2e,core'.

Can anyone give guidance on what could be going on?

I would rather not delete Eclipse and re-install - too painful!!!

I am using Macbook with Oracle JVM 7.

Answer 1

Delete the folder ".org.eclipse.e4.workbench" in ".metadata/.plugins" within the problem workspace and start eclipse with the -clean flag. If this doesn't help also delete all files ".markers.snap".

Answer 2

I just have to delete the file workbench.xmi from directory

[*workspaceXYZ*]/.metadata/.plugins/org.eclipse.e4.workbench

Then the workspace starts again. But this is really a pain...