An internal error occurred during: "Initializing Java Tooling" from Eclipse

Problem
One day as I startup my eclipse it show the error as bellows:

Solution

Step1. Close Eclipse

Step2. Go to your eclipse workspace, and go to this directory

 %workspace%/.metadata/.plugins/org.eclipse.jdt.core/  

ex.

Step3. delete variablesAndContainers.dat

Step4. Start Eclipse