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

If cleaning .metadata folder doesn't work for you there's another solution you might want to try. "Just close the eclipse and open it again". That worked for my eclipse-mars running on Windows 7 64 bit OS. I believe it will work for Android projects too which runs in eclipse environment.