An internal error occurred during “Initializing Java Tooling.” in Eclipse on startup

Question

I am getting this strange error on startup. What could be wrong in my environment?

Here is

Answer 1

OSX Eclipse Luna was hanging for me at the 30% mark of Initializing Java Tool. After a number of startups and force quit cycles I started eclipse from the command line:

/usr/local/eclipse-luna/eclipse --clean

Then closed eclipse and restarted from the taskbar and all OK This resolved the problem for me