Hello, I'm seeing this exception in catalina.out of Tomcat 5.5.15 (2 node
cluster). This is Tomcat code, so I'm wondering if I should fix something or if
the problem is inside Tomcat? Ronald. SEVERE: Unable to serialize delta
request for sessionid [F63F9EDF02547D7610359C7A990650A7]
java.io.NotSerializableException: org.apache.catalina.realm.GenericPrincipal
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1075)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:291)
at java.util.LinkedList.writeObject(LinkedList.java:755) at
sun.reflect.GeneratedMethodAccessor64.invoke(Unknown Source) at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585) at
java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:890)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1333)
at
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1284)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1073)
at java.io.ObjectOutputStream.access$100(ObjectOutputStream.java:135)
at
java.io.ObjectOutputStream$PutFieldImpl.writeFields(ObjectOutputStream.java:1512)
at java.io.ObjectOutputStream.writeFields(ObjectOutputStream.java:418)
at javax.security.auth.Subject$SecureSet.writeObject(Subject.java:1281)
at sun.reflect.GeneratedMethodAccessor63.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585) at
java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:890)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1333)
at
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1284)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1073)
at
java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1369)
at
java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:380)
at
java.util.Collections$SynchronizedCollection.writeObject(Collections.java:1606)
at sun.reflect.GeneratedMethodAccessor62.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585) at
java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:890)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1333)
at
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1284)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1073)
at
java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1369)
at
java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:380)
at javax.security.auth.Subject.writeObject(Subject.java:919) at
sun.reflect.GeneratedMethodAccessor61.invoke(Unknown Source) at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585) at
java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:890)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1333)
at
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1284)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1073)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:291)
at
org.apache.catalina.cluster.session.DeltaRequest$AttributeInfo.writeExternal(DeltaRequest.java:346)
at
org.apache.catalina.cluster.session.DeltaRequest.writeExternal(DeltaRequest.java:263)
at
org.apache.catalina.cluster.session.DeltaManager.unloadDeltaRequest(DeltaManager.java:695)
at
org.apache.catalina.cluster.session.DeltaManager.requestCompleted(DeltaManager.java:1249)
at
org.apache.catalina.cluster.tcp.ReplicationValve.sendSessionReplicationMessage(ReplicationValve.java:328)
at
org.apache.catalina.cluster.tcp.ReplicationValve.invoke(ReplicationValve.java:271)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
at
org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:667)
at
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
at
org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Thread.java:595)
