An internal error occurred during: "Initializing Java Tooling". Duplicate field name&signature in class file org/eclipse/jdt/internal/compiler/ast/ASTNode

Problem

I change to a brand new workspace to import project from gitlab.

After imported and try to do maven => update projects, it show "An internal error occurred during: "Initializing Java Tooling". Duplicate field name&signature in class file org/eclipse/jdt/internal/compiler/ast/ASTNode". 

Here has its screenshot:

Root Cause

This error results from lombok's bug. 

Solution

Step1. Shut down your eclipse

Step2. Go to here to download the jar file : http://projectlombok.org/download-edge.html

Step3. follow the instructions in  http://projectlombok.org/download-edge.html

Step4. Startup your eclipse and do again.

Reference
[1] http://stackoverflow.com/questions/21931107/eclipse-wont-switch-workspace