Maven release plugin fails : source artifacts getting deployed twice

Question

We are using the maven release plugin on hudson and trying to automate the release process. The release:prepare works fine. When we try to do the release:perform , it fails

Answer 1

Try running mvn -Prelease-profile help:effective-pom. You will find that you have two execution sections for maven-source-plugin

The output will look something like this:

    
      maven-source-plugin
      2.0.4
      
        
          attach-sources
          
            jar
          
        
        
          
            jar
          
        
      
    

To fix this problem, find everywhere you have used maven-source-plugin and make sure that you use the "id" attach-sources so that it is the same as the release profile. Then these sections will be merged.

Best practice says that to get consistency you need to configure this in the root POM of your project in build > pluginManagement and NOT in your child poms. In the child pom you just specify in build > plugins that you want to use maven-source-plugin but you provide no executions.

In the room pom.xml:

  
    
      
        org.apache.maven.plugins
        maven-source-plugin
        
          
            
            attach-sources
            
              jar
            
          
        
      
        
  

In the child pom.xml:

  
    
      org.apache.maven.plugins
      maven-source-plugin