Tomcat 5.5 Clustering issues

[Andrew R Feller]

Good morning everyone,

 

I have been trying to get Tomcat clustering between two Tomcat instances
set up, but I have run into some issues.  After opening the necessary
ports in the firewall, routing the broadcast messages to the correct
network interface (eth0), and setting up server.xml with the necessary
membership information, I get the following from my Tomcat logs:

 

2007-07-03 09:16:37,247 INFO
[org.apache.catalina.cluster.tcp.SimpleTcpCluster] - Replication member
added:org.apache.catalina.cluster.mcast.McastMember[tcp://130.39.184.173
:4001,catalina,130.39.184.173,4001, alive=30318]

2007-07-03 09:16:37,256 DEBUG
[org.apache.catalina.cluster.tcp.DataSender] - Create sender
[/130.39.184.173:4,001]

2007-07-03 09:16:40,724 INFO
[org.apache.catalina.cluster.tcp.SimpleTcpCluster] - Received member
disappeared:org.apache.catalina.cluster.mcast.McastMember[tcp://130.39.1
84.173:4001,catalina,130.39.184.173,4001, alive=30318]

 

What could be the cause of cluster members disappearing immediately
after being added?  Am I missing anything necessary for setting up
clustering / session replication?  Relative information about the server
is below.

 

Thank you,

Andrew

 

Tomcat: 5.5.23

Server: RHEL 5

Server.xml:

 

    <Cluster
className="org.apache.catalina.cluster.tcp.SimpleTcpCluster"

 
managerClassName="org.apache.catalina.cluster.session.DeltaManager"

        expireSessionsOnShutdown="false"

        useDirtyFlag="true">

 

        <Membership

            className="org.apache.catalina.cluster.mcast.McastService"

            mcastAddr="239.39.184.173"

            mcastPort="45564"

            mcastFrequency="500"

            mcastDropTime="3000" />

 

        <Receiver

 
className="org.apache.catalina.cluster.tcp.ReplicationListener"

            tcpListenAddress="auto"

            tcpListenPort="4001"

            tcpSelectorTimeout="100"

            tcpThreadCount="6" />

 

        <Sender

 
className="org.apache.catalina.cluster.tcp.ReplicationTransmitter"

            replicationMode="synchronous" />

 

            <Valve
className="org.apache.catalina.cluster.tcp.ReplicationValve"

 
filter=".*\.gif;.*\.js;.*\.jpg;.*\.png;.*\.htm;.*\.html;.*\.css;.*\.txt;
" />

 

        <ClusterListener
className="org.apache.catalina.cluster.session.ClusterSessionListener"
/>

 

    </Cluster>

 

IP table rules:

 

    -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport
4001 -j ACCEPT

    -A RH-Firewall-1-INPUT -p udp --dport 45564 -d 239.39.184.173 -j
ACCEPT