Maven - Different Dependency Version in Test

Question

I\'m suffering an issue similar to Maven 2 - different dependency versions in test and compile but the specified answer there does not work.

In my project I need to depe

Answer 1

What you desire, is no longer valid for Maven 3 (this used to be valid for Maven 2). Maven 3 will attempt to obtain the nearest dependency, effectively ensuring that only one of the compile or test scoped dependency is used for both the compile and test phases.

In your case org.apache.hadoop:hadoop-core:1.0.0:test overrides org.apache.hadoop:hadoop-core:0.20.2-cdh3u2:compile and hence becomes the nearest dependency. You may see the following warning displayed by Maven when running the mvn dependency:list goal, that alludes to this being a problem in your project model:

[WARNING] 'dependencies.dependency.(groupId:artifactId:type:classifier)' must be unique: org.apache.hadoop:hadoop-core:jar -> version 0.20.2-cdh3u2 vs 1.0.0 @ line xyz, column xyz

To 'fix' this, it would be better to split your tests into a separate project whose project model can define a separate set of test dependencies.