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

In my case, the problem was a conflict of derived dependencies that were been used by other dependencies, and some of those derived dependencies versions were not available, maybe because some deploy that i forgot to do because with workspace resolution everything worked, but when moving to other environment all broke suddenly. And also I was working with version ranges

maven was giving me this error:

Could not resolve dependencies for project MyProject:MyProject:jar:1.0.0: Could not resolve version conflict among Dependency-A:1.0.1 -> Dependency-B:1.1.0 -> Dependency-C:1.0.0, Dependency-X:1.0.1 -> Dependency-Y:1.1.0 -> Dependency-C:1.0.0, Dependency-I:1.0.1 -> Dependency-J:1.1.0 -> Dependency-C:1.0.0

I tried all above and nothing worked, so...

THE SOLUTION: Use LATEST as version in all dependencies, so maven don't need to resolve all dependencies in ranges, wich must be used with care because if you miss to deploy one of the dependencies the build will fail

Only I suggest you to use LATEST if you are working with your own dependencies, otherwise in some third party future version, you could find some compilation or runtime errors