title: Unable to obtain archiver for extension 'tgz'
body: <p>I am seeing below error while executing TestNG test cases in Eclipse on my Mac. No idea how to resolve it.</p>
  
  <pre class="lang-none prettyprint-override"><code>[ERROR] Failed to execute goal org.apache.maven.plugins:maven-assembly-plugin:2.2-beta-5:single (make-assembly) on project abc-services-tests: Failed to create assembly: Unable to obtain archiver for extension 'tgz' -&gt; [Help 1]
  </code></pre>
  
  <p>Here is the code from <code>pom.xml</code>:</p>
  
  <pre class="lang-xml prettyprint-override"><code>        &lt;plugin&gt;
              &lt;artifactId&gt;maven-assembly-plugin&lt;/artifactId&gt;
  
              &lt;configuration&gt;
                  &lt;descriptors&gt;
                      &lt;descriptor&gt;src/main/assembly/assembly.xml&lt;/descriptor&gt;
                  &lt;/descriptors&gt;
                  &lt;archive&gt;
                      &lt;manifest&gt;
                          &lt;mainClass&gt;com.xyz.openapi.RunTestNG&lt;/mainClass&gt;
                      &lt;/manifest&gt;
                  &lt;/archive&gt;
                  &lt;descriptorRefs&gt;
                      &lt;descriptorRef&gt;jar-with-dependencies&lt;/descriptorRef&gt;
                  &lt;/descriptorRefs&gt;
              &lt;/configuration&gt;
              &lt;executions&gt;
                  &lt;execution&gt;
  
                      &lt;id&gt;make-assembly&lt;/id&gt;
                      &lt;phase&gt;package&lt;/phase&gt;
                      &lt;goals&gt;
                          &lt;goal&gt;single&lt;/goal&gt;
                      &lt;/goals&gt;
                  &lt;/execution&gt;
              &lt;/executions&gt;
          &lt;/plugin&gt;
  </code></pre>
  
  <p>Can some one please help me resolve this issue?</p>