Good Morning Filip-
I noticed I had similar exceptions caused when I switched my base JVM from
1.42 to 1.5..resolved by recompiling all classes to match expected JVM
signature of ClassLoader
I agree with your direction to understand which ClassLoader is being
invoked-
A good tutorial to understand which classes are being invoked by Tomcat is
located here
http://tomcat.apache.org/tomcat-4.1-doc/class-loader-howto.html
Martin --
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----- Original Message -----
From: "Filip Hanik - Dev Lists" <[EMAIL PROTECTED]>
To: "Tomcat Users List" <users@tomcat.apache.org>
Sent: Sunday, May 21, 2006 7:58 AM
Subject: Re: ClassCastException on cluster deserialization
what does line ClusterAppSessionListener.java:47 do?
can you send us a test case, could be possible that the context
classloader isn't set, hence the loading is failing.
java.lang.ClassCastException: com.package1.subpackage1.GW
at
common.listeners.ClusterAppSessionListener.printSessionInfo(ClusterAppSessionListener.java:47)
at
common.listeners.ClusterAppSessionListener.attributeAdded(ClusterAppSessionListener.java:26)
at
org.apache.catalina.cluster.session.DeltaSession.setAttribute(DeltaSession.java:1310)
Filip
Jean-Christophe Praud wrote:
No. This a specific class for my webapp. It is located in the webapp's
/classes tree, and is instantiated only once per session.
Tim Lucia wrote:
Are there multiple copies of this class in scope (loaded by different
class
loaders)? I know if you have some Oracle classes in WEB-INF/lib AND in
common/lib, you can get a CCE casting from a oracle.X to an oracle.X as
they
come from different class loaders.
Tim
-----Original Message-----
From: Jean-Christophe Praud [mailto:[EMAIL PROTECTED] Sent: Thursday, May
18, 2006 11:02 AM
To: users@tomcat.apache.org
Subject: ClassCastException on cluster deserialization
Hi all,
I'm setting up a Tomcat cluster on two servers, and I keep getting a
ClassCastException on a session variable (GW). The server which handles
the request works well, but the other one can't get the session data.
Its GW object seems to be instantiated,
valueBound(HttpSessionBindingEvent event) is called, the object is added
to the session, then I get the Exception.
I tried with Tomcat 5.5.16 and 5.5.17, with several <Sender>
replicationMode.
My session variable com.package1.subpackage1.GW implements the
Serializable interface and contains some classes which are also
Serializable. I don't see any Exception from the writeObject or
readObject methods on any server.
My config :
<Cluster
className="org.apache.catalina.cluster.tcp.SimpleTcpCluster"
managerClassName="org.apache.catalina.cluster.session.DeltaManager"
expireSessionsOnShutdown="false"
useDirtyFlag="true"
notifyListenersOnReplication="true">
<Membership
className="org.apache.catalina.cluster.mcast.McastService"
mcastAddr="228.0.0.4"
mcastPort="45564"
mcastFrequency="500"
mcastDropTime="3000"/>
<Receiver
className="org.apache.catalina.cluster.tcp.ReplicationListener"
tcpListenAddress="auto"
tcpListenPort="4001"
tcpSelectorTimeout="100"
tcpThreadCount="6"/>
<Sender
className="org.apache.catalina.cluster.tcp.ReplicationTransmitter"
replicationMode="synchronous"
autoConnect="true"
keepAliveTimeout="-1"
ackTimeout="15000"/>
<Valve
className="org.apache.catalina.cluster.tcp.ReplicationValve"
filter=".*\.gif;.*\.js;.*\.jpg;.*\.png;.*\.htm;.*\.html;.*\.css;.*\.txt;"/>
<Deployer
className="org.apache.catalina.cluster.deploy.FarmWarDeployer"
tempDir="/tmp/war-temp/"
deployDir="/tmp/war-deploy/"
watchDir="/tmp/war-listen/"
watchEnabled="false"/>
<ClusterListener
className="org.apache.catalina.cluster.session.ClusterSessionListener"/>
</Cluster>
The Exception's log :
18 mai 2006 16:48:28 org.apache.catalina.cluster.session.DeltaSession
setAttribute
GRAVE: Session attribute event listener threw exception
java.lang.ClassCastException: com.package1.subpackage1.GW
at
common.listeners.ClusterAppSessionListener.printSessionInfo(ClusterAppSessio
nListener.java:47)
at
common.listeners.ClusterAppSessionListener.attributeAdded(ClusterAppSessionL
istener.java:26)
at
org.apache.catalina.cluster.session.DeltaSession.setAttribute(DeltaSession.j
ava:1310)
at
org.apache.catalina.cluster.session.DeltaRequest.execute(DeltaRequest.java:1
59)
at
org.apache.catalina.cluster.session.DeltaManager.handleSESSION_DELTA(DeltaMa
nager.java:1565)
at
org.apache.catalina.cluster.session.DeltaManager.messageReceived(DeltaManage
r.java:1516)
at
org.apache.catalina.cluster.session.DeltaManager.messageDataReceived(DeltaMa
nager.java:1268)
at
org.apache.catalina.cluster.session.ClusterSessionListener.messageReceived(C
lusterSessionListener.java:85)
at
org.apache.catalina.cluster.tcp.SimpleTcpCluster.receive(SimpleTcpCluster.ja
va:1163)
at
org.apache.catalina.cluster.tcp.ClusterReceiverBase.messageDataReceived(Clus
terReceiverBase.java:418)
at
org.apache.catalina.cluster.io.ObjectReader.execute(ObjectReader.java:107)
at
org.apache.catalina.cluster.tcp.TcpReplicationThread.drainChannel(TcpReplica
tionThread.java:138)
at
org.apache.catalina.cluster.tcp.TcpReplicationThread.run(TcpReplicationThrea
d.java:69)
What did I miss ?
Regards,
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