title: Standard Manager loaded instead of DeltaManager
body: <p>We have websites running on Tomcat. Some of them are clustered (typically two nodes in a cluster), and it all works fine. </p>
  
  <p>However, we have one pair where the sessions are not replicated correctly, even though the config appears to be similar to our other (working) installations. </p>
  
  <p>When I examine the Tomcat nodes via JMX, I see that Cluster.modelerType is set to org.apache.catalina.ha.tcp.SimpleTcpCluster for both working and non-working sites.</p>
  
  <p>However, when I look at the Manager, I see that DeltaManager is loaded for the working nodes, but StandardManager is loaded for the node that is not working.</p>
  
  <p>The web.xml does have "&lt;distributable/&gt;" set. Also, "&lt;manager/&gt;" is COMMENTED in context.xml. So, those two are not the issue. </p>
  
  <p>Here is a snippet from server.xml (Tomcat 7.0.42)</p>
  
  <pre><code>&lt;Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster" channelSendOptions="8"&gt;
     &lt;Channel className="org.apache.catalina.tribes.group.GroupChannel"&gt;
       &lt;Membership className="org.apache.catalina.tribes.membership.McastService"
        address="228.0.3.4"
        port="23810"
        frequency="500"
        dropTime="3000" 
       /&gt;
       &lt;Receiver className="org.apache.catalina.tribes.transport.nio.NioReceiver"    
              address="192.168.1.144"
       /&gt;    
     &lt;/Channel&gt;
  &lt;/Cluster&gt; 
  </code></pre>
  
  <p>Any ideas what part of the configuration might cause SimpleTcpCluster to be active, but StandardManager to be in use?</p>