Hi!
I've a session replication problem I don't know how to solve.
I've installed a tomcat cluster with 2 tomcat workers (v6.0.14) and an
apache server 2.2.3 as load balancer, with mod_jk.
I've configured DeltaManager for session replication. When I use sticky
sessions, all works propertly, when I stop one tomcat the other one
handles the session.
However, if I disable sticky sessions things change. As a first sight,
it seems to work ok. Each request is processed by a different tomcat,
sessions are replicated propertly. However, if I send several requests
too fast (well, not so fast, just clicking F5 in the web browser 1 or 2
times per second), after a short time the session is suddenly lost, and
a new session is created. May it be a session replication problem? I've
tried with several cluster->channelSendOptions but I always have the
same problem. Note that with sticky sessions in the load balancer the
problem does not exists. Any ideas?
Thank you in advance.
Cheers,
Vreixo Formoso
----------------- cluster config in server.xml ----------
<Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"
channelSendOptions="4">
<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"
port="45564"
frequency="500"
dropTime="3000"/>
<Receiver
className="org.apache.catalina.tribes.transport.nio.NioReceiver"
address="auto"
port="4002"
autoBind="100"
selectorTimeout="5000"
maxThreads="6"/>
<Sender
className="org.apache.catalina.tribes.transport.ReplicationTransmitter">
<Transport
className="org.apache.catalina.tribes.transport.nio.PooledParallelSender"/>
</Sender>
<Interceptor
className="org.apache.catalina.tribes.group.interceptors.TcpFailureDetector"/>
<Interceptor
className="org.apache.catalina.tribes.group.interceptors.MessageDispatch15Interceptor"/>
</Channel>
<Valve className="org.apache.catalina.ha.tcp.ReplicationValve"
filter=""/>
<Valve
className="org.apache.catalina.ha.session.JvmRouteBinderValve"/>
<Deployer
className="org.apache.catalina.ha.deploy.FarmWarDeployer"
tempDir="/tmp/war-temp/"
deployDir="/tmp/war-deploy/"
watchDir="/tmp/war-listen/"
watchEnabled="false"/>
<ClusterListener
className="org.apache.catalina.ha.session.JvmRouteSessionIDBinderListener"/>
<ClusterListener
className="org.apache.catalina.ha.session.ClusterSessionListener"/>
</Cluster>
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