Why does relocation with the maven shade plugin not work?

Question

I am having some trouble running a Hadoop job that includes a newer version of Guava than the one that is included in the Hadoop distribution (CDH 5.2). This is a known problem. I try to solve it by shading the libraries using the Maven shade plugin. Therefore, I added the following lines to my pom.xml:

  <plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-shade-plugin</artifactId>
    <version>2.3</version>
    <executions>
      <execution>
        <phase>package</phase>
        <goals>
          <goal>shade</goal>
        </goals>
        <configuration>
          <relocations>
            <relocation>
              <pattern>com.google</pattern>
              <shadedPattern>thirdparty.com.google</shadedPattern>
            </relocation>
          </relocations>
        </configuration>
      </execution>
    </executions>
  </plugin>

Unfortunately, the shading seems not to work. When I extract the uber-JAR there is no folder thirdparty/com/google but still the folder com/google.

Does someone have an idea what is going wrong?

Answer 1

This worked for me:

<relocations>
   <relocation>
     <pattern>com.google.</pattern>
     <shadedPattern>thirdparty.com.google.</shadedPattern>
   </relocation>
 </relocations>

note the dot at the end of the pattern.