An internal error occurred during: “Updating Maven Project”. java.lang.NullPointerException

Question

I\'m developing a Java EE web project. When I try to add a dependency, this error message appears. I use Eclipse Kepler.

An internal error occurred du

Answer 1

Just another possible source of the problem!

I found out that in my case it was the following resource block that caused it:

    
        
            
                ${basedir}/../some-folder
                outputFolder
            
        
    

It included a folder from the project folder (the eclipse project is a subfolder of the versioned project folder).

In my case, I could remove the error by removing the block and replacing it with a call to the Build helper Maven plugin:

    
        
            org.codehaus.mojo
            build-helper-maven-plugin
            1.9.1
            
                
                    my-own-very-cool-id-for-this-step
                    generate-resources
                    
                        add-resource
                    
                    
                        
                            
                                ${basedir}/../some-folder
                                outputFolder