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From "Andrew R Feller" <afel...@lsu.edu>
Subject RE: Tomcat 5.5 Clustering issues
Date Mon, 09 Jul 2007 14:03:07 GMT
Is the multicast heartbeat picked up over the multicast IP or the
Receiver address that is broadcasted?  I assume it is the multicast IP
as the Receiver is supposedly used for replication only.

Andrew R Feller, Analyst
Subversion Administrator
University Information Systems
Louisiana State University
afelle1@lsu.edu
(office) 225.578.3737
-----Original Message-----
From: Filip Hanik - Dev Lists [mailto:devlists@hanik.com] 
Sent: Tuesday, July 03, 2007 9:55 AM
To: Tomcat Users List
Subject: Re: Tomcat 5.5 Clustering issues

the disappeared message appears 3seconds after the member added message.
3 seconds is the timeout you have set, ie, if no multicast heartbeat is 
received after 3 seconds, consider the member dead.
so it seems like multicasting is not working properly on your system.

Filip

Andrew R Feller wrote:
> 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
>
>
>   
>
------------------------------------------------------------------------
>
> No virus found in this incoming message.
> Checked by AVG Free Edition. 
> Version: 7.5.476 / Virus Database: 269.9.14/884 - Release Date:
7/2/2007 3:35 PM
>   


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