title: struts2 default interceptor stack configuration
body: <p>I want to configure a parameter for the exception interceptor to log exceptions.
  So I created a package in struts.xml and copied the default-stack from struts-default.xml.
  However it doesn't log exceptions and seems to still use the defaultStack.</p>
  
  <p>Here is my struts.xml:</p>
  
  <pre><code>&lt;struts&gt;
     &lt;package name="default" extends="struts-default"&gt;
        &lt;interceptors&gt;
           &lt;interceptor-stack name="myStack"&gt;
              &lt;interceptor-ref name="exception"&gt;
                 &lt;param name="logEnabled"&gt; true &lt;/param&gt;
                 &lt;param name="logCategory"&gt; struts &lt;/param&gt;
                 &lt;param name="logLevel"&gt; ERROR &lt;/param&gt;
              &lt;/interceptor-ref&gt;
              ...
           &lt;/interceptor-stack&gt;
        &lt;/interceptors&gt;
  
        &lt;default-interceptor-ref name="myStack" /&gt;
     &lt;/package&gt;
  &lt;/struts&gt;
  </code></pre>