Maven build [WARNING] we have a duplicate class

Question

Anybody has any idea what happened to my maven build? I am getting a lot of duplicate warnings.

[WARNING] We have a duplicate org/apache/commons/logging/impl         


        

Answer 1

Take a look at the "Dependency Exclusions" section in the Maven doc.

In your provided example, I'll exclude the commons-logging:commons-logging-api:jar:1.0.4:compile dependency from org.apache.hadoop.hive:hive-common:jar:0.7.1-cdh3u3:compile. In your pom.xml :

    
        org.apache.hadoop.hive
        hive-common:jar
        0.7.1-cdh3u3
        
            
                commons-logging
                commons-logging-api