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From Filip Hanik - Dev Lists <devli...@hanik.com>
Subject Re: Tomcat 6 Cluster Woes
Date Wed, 06 Aug 2008 01:14:28 GMT
have you by any chance deployed your apps in <Host> elements with a 
different name?

Filip

Zachariah Zachariah wrote:
> Hi,
>
> I am trying to set up a cluster of tomcat servers to serve up my 
> dynamic content with session replication. Although failover seems to 
> be working with each node aware of the other, Session replication does 
> not work quite as expected. I get the error "WARNING: Context manager 
> doesn't exist" warning. For testing I use the Sessions example in the 
> examples web application of the tomcat distribtion. Although I see 
> session variables created through one node the other node does not 
> receive the variables.
>
> Here is how I have set up the nodes:
>
> Zither: NFS server serving apache/tomcat binaries and config files
> Z2: node1 running Apache 2.2 and Tomcat 6
> Z3: node2 running Apache 2.2 and Tomcat 6
>
> Load balancer: mod_jk
> CATALINA_BASE: /usr/local/tomcat/<node name>
> CATALINA_HOME: /usr/local/tomcat
>
> Each node has its own config and logs directory under CATALINA_BASE
>
> My server.xml file with cluser section shown:
>
> / <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"
> channelSendOptions="8">
> <!--
> <Manager className="org.apache.catalina.ha.session.BackupManager"
> expireSessionsOnShutdown="false"
> notifyListenersOnReplication="true"
> mapSendOptions="6"/>
> -->
> <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="z2"
> port="5000"
> selectorTimeout="100"
> 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"/>

>
> <Interceptor 
> className="org.apache.catalina.tribes.group.interceptors.ThroughputInterceptor"/>

>
> </Channel>
>
> <Valve className="org.apache.catalina.ha.tcp.ReplicationValve"
> filter=".*\.gif;.*\.js;.*\.jpg;.*\.png;.*\.htm;.*\.html;.*\.css;.*\.txt;"/> 
>
> <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>/
>
>
>
> Here are the snippets from the Catalina.out log files of Z1 and Z2
>
> From NODE Z2
>
> /Aug 1, 2008 12:09:11 PM org.apache.catalina.ha.session.DeltaManager 
> start
> INFO: Starting clustering manager at /manager
> Aug 1, 2008 12:09:11 PM org.apache.catalina.ha.session.DeltaManager 
> getAllClusterSessions
> INFO: Manager [z2#/manager]: skipping state transfer. No members 
> active in cluster group.
> Aug 1, 2008 12:09:11 PM 
> org.apache.catalina.ha.session.JvmRouteBinderValve start
> INFO: JvmRouteBinderValve started
> Aug 1, 2008 12:09:11 PM org.apache.coyote.http11.Http11Protocol start
> INFO: Starting Coyote HTTP/1.1 on http-8080
> Aug 1, 2008 12:09:11 PM org.apache.jk.common.ChannelSocket init
> INFO: JK: ajp13 listening on /0.0.0.0:8009
> Aug 1, 2008 12:09:11 PM org.apache.jk.server.JkMain start
> INFO: Jk running ID=0 time=0/34 config=null
> Aug 1, 2008 12:09:11 PM org.apache.catalina.startup.Catalina start
> INFO: Server startup in 3552 ms
> Aug 1, 2008 12:13:25 PM 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
> Aug 1, 2008 12:13:25 PM org.apache.catalina.ha.tcp.SimpleTcpCluster 
> memberAdded
> INFO: Replication member 
> added:org.apache.catalina.tribes.membership.MemberImpl[tcp://z3:5000,z3,5000, 
> alive=1015,id={111 -85 -38 -109 -29 -125 69 -7
> 1 -118 121 71 35 86 80 86 20 }, payload={}, command={}, domain={}, ]
> Aug 1, 2008 12:13:27 PM 
> org.apache.catalina.ha.session.ClusterSessionListener messageReceived
> WARNING: Context manager doesn't exist:z3#/TestWebApp
> Aug 1, 2008 12:14:27 PM 
> org.apache.catalina.ha.session.ClusterSessionListener messageReceived
> WARNING: Context manager doesn't exist:z3#/examples
> Aug 1, 2008 12:15:27 PM 
> org.apache.catalina.ha.session.ClusterSessionListener messageReceived
> WARNING: Context manager doesn't exist:z3#/CVS
> Aug 1, 2008 12:16:27 PM 
> org.apache.catalina.ha.session.ClusterSessionListener messageReceived
> WARNING: Context manager doesn't exist:z3#/manager
> Aug 1, 2008 5:20:09 PM 
> org.apache.catalina.ha.session.ClusterSessionListener messageReceived
> WARNING: Context manager doesn't exist:z3#/examples
> Aug 1, 2008 5:20:29 PM 
> org.apache.catalina.ha.session.ClusterSessionListener messageReceived
> WARNING: Context manager doesn't exist:z3#/examples
> Aug 1, 2008 5:21:12 PM 
> org.apache.catalina.ha.session.ClusterSessionListener messageReceived
> WARNING: Context manager doesn't exist:z3#/examples
> Aug 1, 2008 5:51:47 PM 
> org.apache.catalina.ha.session.ClusterSessionListener messageReceived
> WARNING: Context manager doesn't exist:z3#/examples
> Aug 4, 2008 9:33:52 AM org.apache.catalina.core.ApplicationContext log
> INFO: SessionListener: 
> sessionCreated('F3BFE5345E7EE26DEA2409E01B06BE0A.z2')
> Aug 4, 2008 9:33:52 AM 
> org.apache.catalina.tribes.group.interceptors.ThroughputInterceptor 
> report
> INFO: ThroughputInterceptor Report[
> Tx Msg:1 messages
> Sent:0.00 MB (total)
> Sent:0.00 MB (application)
> Time:0.01 seconds
> Tx Speed:0.07 MB/sec (total)
> TxSpeed:0.07 MB/sec (application)
> Error Msg:0
> Rx Msg:9 messages
> Rx Speed:0.00 MB/sec (since 1st msg)
> Received:0.00 MB]/
>
>
>
> FROM NODE Z3 (session variables are created through this node)
>
> /Aug 1, 2008 12:13:23 PM org.apache.catalina.ha.tcp.SimpleTcpCluster 
> setProperty
> WARNING: Dynamic setProperty(className,value) has been disabled, 
> please use explicit properties for the element you are trying to identify
> Aug 1, 2008 12:13:24 PM org.apache.coyote.http11.Http11Protocol init
> INFO: Initializing Coyote HTTP/1.1 on http-8080
> Aug 1, 2008 12:13:24 PM org.apache.catalina.startup.Catalina load
> INFO: Initialization processed in 1099 ms
> Aug 1, 2008 12:13:24 PM org.apache.catalina.users.MemoryUserDatabase save
> WARNING: User database is not persistable - no write permissions on 
> directory
> Aug 1, 2008 12:13:24 PM org.apache.catalina.core.StandardService start
> INFO: Starting service Catalina
> Aug 1, 2008 12:13:24 PM org.apache.catalina.core.StandardEngine start
> INFO: Starting Servlet Engine: Apache Tomcat/6.0-snapshot
> Aug 1, 2008 12:13:24 PM org.apache.catalina.ha.tcp.SimpleTcpCluster start
> INFO: Cluster is about to start
> Aug 1, 2008 12:13:24 PM 
> org.apache.catalina.tribes.transport.ReceiverBase bind
> INFO: Receiver Server Socket bound to:z3/192.168.0.3:5000
> Aug 1, 2008 12:13:24 PM 
> org.apache.catalina.tribes.membership.McastServiceImpl setupSocket
> INFO: Setting cluster mcast soTimeout to 500
> Aug 1, 2008 12:13:24 PM 
> org.apache.catalina.tribes.membership.McastServiceImpl waitForMembers
> INFO: Sleeping for 1000 milliseconds to establish cluster membership, 
> start level:4
> Aug 1, 2008 12:13:25 PM org.apache.catalina.ha.tcp.SimpleTcpCluster 
> memberAdded
> INFO: Replication member 
> added:org.apache.catalina.tribes.membership.MemberImpl[tcp://z2:5000,z2,5000, 
> alive=256519,id={-99 -73 116 5 29 -120 69 124
> -70 106 64 -72 -2 -118 -116 96 }, payload={}, command={}, domain={}, ]
> Aug 1, 2008 12:13:25 PM 
> org.apache.catalina.tribes.membership.McastServiceImpl waitForMembers
> INFO: Done sleeping, membership established, start level:4
> Aug 1, 2008 12:13:25 PM 
> org.apache.catalina.tribes.membership.McastServiceImpl waitForMembers
> INFO: Sleeping for 1000 milliseconds to establish cluster membership, 
> start level:8
> Aug 1, 2008 12:13:25 PM 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
> Aug 1, 2008 12:13:26 PM 
> org.apache.catalina.tribes.membership.McastServiceImpl waitForMembers
> INFO: Done sleeping, membership established, start level:8
> Aug 1, 2008 12:13:27 PM org.apache.catalina.ha.session.DeltaManager start
> INFO: Register manager /TestWebApp to cluster element Engine with name 
> Catalina
> Aug 1, 2008 12:13:27 PM org.apache.catalina.ha.session.DeltaManager start
> INFO: Starting clustering manager at /TestWebApp
> Aug 1, 2008 12:13:27 PM org.apache.catalina.ha.session.DeltaManager 
> getAllClusterSessions
> WARNING: Manager [z3#/TestWebApp], requesting session state from 
> org.apache.catalina.tribes.membership.MemberImpl[tcp://z2:5000,z2,5000, 
> alive=258559
> ,id={-99 -73 116 5 29 -120 69 124 -70 106 64 -72 -2 -118 -116 96 }, 
> payload={}, command={}, domain={}, ]. This operation will timeout if 
> no session s
> tate has been received within 60 seconds.
> Aug 1, 2008 12:13:27 PM 
> org.apache.catalina.tribes.group.interceptors.ThroughputInterceptor 
> report
> INFO: ThroughputInterceptor Report[
> Tx Msg:1 messages
> Sent:0.00 MB (total)
> Sent:0.00 MB (application)
> Time:0.01 seconds
> Tx Speed:0.07 MB/sec (total)
> TxSpeed:0.07 MB/sec (application)
> Error Msg:0
> Rx Msg:1 messages
> Rx Speed:0.00 MB/sec (since 1st msg)
> Received:0.00 MB]
> :$
> SEVERE: Manager [z3#/manager]: No session state send at 8/1/08 12:16 
> PM received, timing out after 60,007 ms.
> Aug 1, 2008 12:17:27 PM 
> org.apache.catalina.ha.session.JvmRouteBinderValve start
> INFO: JvmRouteBinderValve started
> Aug 1, 2008 12:17:27 PM org.apache.coyote.http11.Http11Protocol start
> INFO: Starting Coyote HTTP/1.1 on http-8080
> Aug 1, 2008 12:17:28 PM org.apache.jk.common.ChannelSocket init
> INFO: JK: ajp13 listening on /0.0.0.0:8010
> Aug 1, 2008 12:17:28 PM org.apache.jk.server.JkMain start
> INFO: Jk running ID=0 time=0/34 config=null
> Aug 1, 2008 12:17:28 PM org.apache.catalina.startup.Catalina start
> INFO: Server startup in 243934 ms
> Aug 1, 2008 5:20:09 PM org.apache.catalina.core.ApplicationContext log
> INFO: SessionListener: 
> sessionCreated('949E5DEEB498834B9312D3076C2687CE.z3')
> Aug 1, 2008 5:20:29 PM org.apache.catalina.core.ApplicationContext log
> INFO: SessionListener: 
> attributeAdded('949E5DEEB498834B9312D3076C2687CE.z3', 'zkzac', '123')
> Aug 1, 2008 5:21:12 PM org.apache.catalina.core.ApplicationContext log
> INFO: SessionListener: 
> attributeAdded('949E5DEEB498834B9312D3076C2687CE.z3', 'bob', '321')
> Aug 1, 2008 5:51:47 PM org.apache.catalina.core.ApplicationContext log
> INFO: SessionListener: 
> sessionDestroyed('949E5DEEB498834B9312D3076C2687CE.z3')
> Aug 1, 2008 5:51:47 PM org.apache.catalina.core.ApplicationContext log
> INFO: SessionListener: 
> attributeRemoved('949E5DEEB498834B9312D3076C2687CE.z3', 'bob', '321')
> Aug 1, 2008 5:51:47 PM org.apache.catalina.core.ApplicationContext log
> INFO: SessionListener: 
> attributeRemoved('949E5DEEB498834B9312D3076C2687CE.z3', 'zkzac', '123')
> Aug 4, 2008 9:33:52 AM 
> org.apache.catalina.ha.session.ClusterSessionListener messageReceived
> WARNING: Context manager doesn't exist:z2#/examples
>
>
>
>
>
> /
>
> I would be very grateful is someone who have set up a working cluster 
> on Tomcat 6 throw some light on where I could have gone wrong.
>
> Thanks much.
>
> --Zac
>


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