Question on Tomcat clustering

[Martin Knoblauch]

Hi,

 one question on Tomcat HA clustering. Is there a way (e.g. a log file
pattern to look for) to find out that a sessions activity has actually been
transfered to another cluster node? We are operating a productive
environment with 6 clustered TC processes and we would like to know how
oftenthe clustering actually kicks in.

 We are on Tomcat 7. Please don't tell me to upgrade, but the productive
version of the software is not certified with anything newer.

 Here is the cluster part of the configuration:

        <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"
                 channelSendOptions="8">

          <Manager className="org.apache.catalina.ha.session.DeltaManager"
                   expireSessionsOnShutdown="false"
                   notifyListenersOnReplication="true"/>

          <Channel
className="org.apache.catalina.tribes.group.GroupChannel">
            <Membership
className="org.apache.catalina.tribes.membership.McastService"
                        address="228.0.0.4"
                        bind="real hostname censored"
                        port="45564"
                        frequency="1000"
                        dropTime="30000"/>
            <Receiver
className="org.apache.catalina.tribes.transport.nio.NioReceiver"
                      address="auto"
                      port="4001"
                      autoBind="100"
                      selectorTimeout="5000"
                      maxThreads="6"/>

            <Sender
className="org.apache.catalina.tribes.transport.ReplicationTransmitter" >
              <Transport
className="org.apache.catalina.tribes.transport.nio.PooledParallelSender"
timeout="60000"/>
            </Sender>
            <Interceptor
className="org.apache.catalina.tribes.group.interceptors.TcpFailureDetector"/>
            <Interceptor
className="org.apache.catalina.tribes.group.interceptors.MessageDispatch15Interceptor"/>
            <Interceptor
className="org.apache.catalina.tribes.group.interceptors.ThroughputInterceptor"
interval="100000"/>
          </Channel>


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

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

            <Deployer
className="org.apache.catalina.ha.deploy.FarmWarDeployer"
                      tempDir="/tmp/war-temp/"
                      deployDir="/tmp/war-deploy/"
                      watchDir="/tmp/war-listen/"
                      watchEnabled="false"/>

            <Valve
className="org.apache.catalina.ha.session.JvmRouteBinderValve"
               enabled="true" sessionIdAttribute="takeoverSessionid"/>
            <ClusterListener
className="org.apache.catalina.ha.session.JvmRouteSessionIDBinderListener"
/>
            <ClusterListener
className="org.apache.catalina.ha.session.ClusterSessionListener"/>
        </Cluster>

Cheers
Martin
-- 
------------------------------------------------------
Martin Knoblauch
email: k n o b i AT knobisoft DOT de
www: http://www.knobisoft.de