Eclipse will not start and I haven't changed anything
Solution 1:
I used eclipse -clean -clearPersistedState
and that worked for me. You will lose your window layout configuration, but that seems minor to me.
For Linux systems try: ./eclipse -clean -clearPersistedState
See Eclipse JUNO doesn't start
Solution 2:
Ok so i figured it out. Go to yourWorkspace/.metadata/.plugins and delete everything in there. Eclipse will start and repopulate the folder.
Solution 3:
Removing workbench.xmi under workspace/.metadata/.plugins/org.eclipse.e4.workbench/ worked for me. It did not remove the existing projects.
Solution 4:
This works like champ on mac os or windows.
Remove workbench.xmi located at workspace/.metadata/.plugins/org.eclipse.e4.workbench/workbench.xmi. Then start your Eclipse or ADT. This will not erase your workspace or repository.
Remove workbench.xmi cmd:
rm workspace/.metadata/.plugins/org.eclipse.e4.workbench/workbench.xmi.