Tomcat native cluster not working because of ClassNotFoundException:
org.apache.catalina.ha.session.SessionMessageImpl
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Key: GERONIMO-5616
URL: https://issues.apache.org/jira/browse/GERONIMO-5616
Project: Geronimo
Issue Type: Bug
Security Level: public (Regular issues)
Components: Tomcat
Affects Versions: 3.0
Environment: Windows 7 x86
sun jdk 1.6.0_20
Reporter: Forrest Xia
Configure the tomcat native cluster via these steps to reproduce this bug
1. Get a latest geronimo tomcat build and unzip it to a folder
2. Update var/catalina/server.xml to add these lines into <Engine>
<Engine name="Catalina" defaultHost="${ServerHostname}" jvmRoute="server2">
<!--Put the cluster just after Engine, not in the Host element-->
<Cluster
className="org.apache.catalina.ha.tcp.SimpleTcpCluster" channelSendOptions="8">
<Manager
className="org.apache.catalina.ha.session.DeltaManager"
expireSessionsOnShutdown="false" notifyListenersOnReplication="true"
name="${clusterName}" channelSendOptions="6" mapSendOptions="6"/>
<Channel
className="org.apache.catalina.tribes.group.GroupChannel">
<!--Update <server1_IP> with the real IP, for example,
9.1.2.3, the server2 must be in the same subnet as server1-->
<Membership
className="org.apache.catalina.tribes.membership.McastService" bind="localhost"
address="228.0.0.4" port="45564" frequency="500" dropTime="3000" />
<Receiver
className="org.apache.catalina.tribes.transport.nio.NioReceiver"
address="localhost" port="4000" 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"
interval="60"/>
<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" />
<ClusterListener
className="org.apache.catalina.ha.session.JvmRouteSessionIDBinderListener" />
<ClusterListener
className="org.apache.catalina.ha.session.ClusterSessionListener" />
</Cluster>
3. Copy this server to another folder and update the portoffset, so that the
server can run in the same machine, note that change jvmRoute property to
another value.
4. Start server1 and server2, the server will try to setup a dynamic clustering
via multicast service. You will see an ClassNotFoundException when trying to
setup the cluster as following:
2010-09-20 23:42:06,594 ERROR [GroupChannel] Unable to deserialize
message:ClusterData[src=org.apache.catalina.tribes.membership.MemberImpl[tcp://{127,
0, 0, 1}:4000,{127, 0, 0, 1},4000, alive=15847, securePort=-1, UDP Port=-1,
id={-69 -59 107 100 42 49 65 125 -87 88 55 -60 67 60 110 -25 }, payload={},
command={}, domain={}, ]; id={102 -106 41 40 -55 -74 75 -106 -70 15 -66 -8 -58
117 -11 -16 }; sent=2010-09-20 23:42:06.567]
java.lang.ClassNotFoundException:
org.apache.catalina.ha.session.SessionMessageImpl
at
org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:494)
at
org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:410)
at
org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:398)
at
org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:105)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:247)
at java.io.ObjectInputStream.resolveClass(ObjectInputStream.java:604)
at
java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1575)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1496)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1732)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
at
org.apache.catalina.tribes.io.XByteBuffer.deserialize(XByteBuffer.java:573)
at
org.apache.catalina.tribes.io.XByteBuffer.deserialize(XByteBuffer.java:555)
at
org.apache.catalina.tribes.group.GroupChannel.messageReceived(GroupChannel.java:258)
at
org.apache.catalina.tribes.group.ChannelInterceptorBase.messageReceived(ChannelInterceptorBase.java:80)
at
org.apache.catalina.tribes.group.interceptors.TcpFailureDetector.messageReceived(TcpFailureDetector.java:112)
at
org.apache.catalina.tribes.group.ChannelInterceptorBase.messageReceived(ChannelInterceptorBase.java:80)
at
org.apache.catalina.tribes.group.ChannelInterceptorBase.messageReceived(ChannelInterceptorBase.java:80)
at
org.apache.catalina.tribes.group.interceptors.ThroughputInterceptor.messageReceived(ThroughputInterceptor.java:90)
at
org.apache.catalina.tribes.group.ChannelInterceptorBase.messageReceived(ChannelInterceptorBase.java:80)
at
org.apache.catalina.tribes.group.ChannelCoordinator.messageReceived(ChannelCoordinator.java:258)
at
org.apache.catalina.tribes.transport.ReceiverBase.messageDataReceived(ReceiverBase.java:271)
at
org.apache.catalina.tribes.transport.nio.NioReplicationTask.drainChannel(NioReplicationTask.java:212)
at
org.apache.catalina.tribes.transport.nio.NioReplicationTask.run(NioReplicationTask.java:101)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)
This exception will lead to session replication failures. I guess this is
caused by classloader mechanism change. In the bundle classloader, there is no
SessionMessageImpl class to be able to load.
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