you can turn debug on and see the messages being sent back and forth.
a previous user reported that sessions got expired during a normal
shutdown, I yet have to investigate this
Filip
Giancarlo Frison wrote:
Hi all,
I have a cluster configured with 2 tomcat instaces in the same host and
apache + mod_jk as load balancer with stiky session.
The instances' server.xml (show below) diff only for
/Cluster/Channel/Receiver[port] attribute, the first one set to 4000 and
the second one set to 4001.
The 2 instances seem aware each other at the startup as report by the
log of clone1 (listening on port 4000):
Nov 29, 2007 10:57:43 AM org.apache.coyote.ajp.AjpAprProtocol start
INFO: Starting Coyote AJP/1.3 on ajp-8009
Nov 29, 2007 10:57:43 AM org.apache.catalina.startup.Catalina start
INFO: Server startup in 4364 ms
Nov 29, 2007 10:58:03 AM org.apache.catalina.tribes.io.BufferPool
getBufferPool
INFO: Created a buffer pool with max size:104857600 bytes of
type:org.apache.catalina.tribes.io.BufferPool15Impl
Nov 29, 2007 10:58:04 AM org.apache.catalina.ha.tcp.SimpleTcpCluster
memberAdded
INFO: Replication member
added:org.apache.catalina.tribes.membership.MemberImpl[tcp://localhost.localdomain:4001,localhost.localdomain,4001,
alive=1009,id={31 -16 121 -113 112 30 72 -34 -128 51 27 -12 115 7 -107
-22 }, payload={}, command={}, domain={}, ]
To test the session replication I've created a session on clone2
afterwards I shutted down such instance, as reported by clone1 catalina.out:
Nov 29, 2007 11:00:47 AM
org.apache.catalina.tribes.group.interceptors.TcpFailureDetector
memberDisappeared
INFO: Verification complete. Member
disappeared[org.apache.catalina.tribes.membership.MemberImpl[tcp://localhost.localdomain:4001,localhost.localdomain,4001,
alive=164497,id={31 -16 121 -113 112 30 72 -34 -128 51 27 -12 115 7 -107
-22 }, payload={}, command={66 65 66 89 45 65 76 69 88 ...(9)},
domain={}, ]]
Nov 29, 2007 11:00:47 AM org.apache.catalina.ha.tcp.SimpleTcpCluster
memberDisappeared
INFO: Received member
disappeared:org.apache.catalina.tribes.membership.MemberImpl[tcp://localhost.localdomain:4001,localhost.localdomain,4001,
alive=164497,id={31 -16 121 -113 112 30 72 -34 -128 51 27 -12 115 7 -107
-22 }, payload={}, command={66 65 66 89 45 65 76 69 88 ...(9)}, domain={}, ]
With clone2 failover the mod_jk dispatch the request to the clone1. I've
expected to find in the clone1 the session, instead request.getSession()
== false.
The cluster configuration follow stiky session rule, the load balancer
works fine, everything ok except for session replication.
Any clue on these cases?
Thanks a lot!
-- worker.properties:
worker.list=lbworker
worker.lbworker.type=lb
worker.lbworker.balance_workers=c1,c2
worker.c1.type=ajp13
worker.c1.host=localhost
worker.c1.port=8009
worker.c2.type=ajp13
worker.c2.host=localhost
worker.c2.port=8010
-- server.xml
<Cluster channelSendOptions="8"
className="org.apache.catalina.ha.tcp.SimpleTcpCluster">
<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 address="localhost" autoBind="100"
className="org.apache.catalina.tribes.transport.nio.NioReceiver"
maxThreads="6" port="4000" selectorTimeout="5000" />
<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"
/>
<Interceptor
className="org.apache.catalina.tribes.group.interceptors.ThroughputInterceptor"/>
</Channel>
<Valve
className="org.apache.catalina.ha.tcp.ReplicationValve" filter="" />
<Valve
className="org.apache.catalina.ha.session.JvmRouteBinderValve" />
<ClusterListener
className="org.apache.catalina.ha.session.JvmRouteSessionIDBinderListener"
/>
<ClusterListener
className="org.apache.catalina.ha.session.ClusterSessionListener" />
</Cluster>
Giancarlo Frison
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