Fixing problem of Eclipse WorkSpace failed to Startup

There can be a lot of issues in Eclipse startup . But there is one of the quite common one is eclipse resources cache or state gets out of sync/corrupted.This can happen when your IDE crashes OR also without crashing. For fixing that bug just remove ".snap" file from Workspace. See below how to delete
these ".snap" file.

<directory of workspace>/.metadata/.plugins/org.eclipse.core.resources/ 

inside of that you will find ".snap" file just delete that file.Then  Eclipse started fine.

OR You can use use this command also
                  " sudo eclipse -clean"
it also working fine