Errors running builder JavaScript Validator

When using eclipse recently, there is always a problem compiling the project.

Errors occurred during the build.
Errors running builder 'JavaScript Validator' on project 'IShangOA'.
java.lang.NullPointerException

To solve this problem, remove the JavaScript Validator. The way to remove it is: select a project - right click Properties - Builders (row two) - click on the right and there will be four items - cancel the check of the first item "JavaScript Validator" and it will be OK