I'm running a 3 node horizontal cluster with WPS 5.1.0.4 running on
WAS ND 6.0.2.11. The session values (simple Strings at this point)
are not being replicated among the nodes. I am using Memory-to-memory
replication. In the SystemErr.log for each portal server I see the
following exceptions repeating over and over:

[4/23/07 9:41:59:168 EDT] 000000c4 SystemErr R
java.io.EOFException
at java.io.DataInputStream.readFully(DataInputStream. java(Compiled
Code))
at java.io.DataInputStream.readInt(DataInputStream.ja va(Compiled
Code))
at java.io.ObjectInputStream
$BlockDataInputStream.readInt(ObjectInputStream.ja va(Inlined Compiled
Code))
at java.io.ObjectInputStream.readInt(ObjectInputStrea m.java(Compiled
Code))
at
com.ibm.ws.webcontainer.httpsession.HttpSessDRSBuf fWrapper.readExternal(HttpSessDRSBuffWrapper.java( Compiled
Code))
at
java.io.ObjectInputStream.readExternalData(ObjectI nputStream.java(Compiled
Code))
at
java.io.ObjectInputStream.readOrdinaryObject(Objec tInputStream.java(Compiled
Code))
at
java.io.ObjectInputStream.readObject0(ObjectInputS tream.java(Compiled
Code))
at
java.io.ObjectInputStream.readObject(ObjectInputSt ream.java(Compiled
Code))
at java.util.Hashtable.readObject(Hashtable.java(Comp iled Code))
at sun.reflect.GeneratedMethodAccessor71.invoke(Unkno wn Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(De legatingMethodAccessorImpl.java(Compiled
Code))
at java.lang.reflect.Method.invoke(Method.java(Compil ed Code))
at
java.io.ObjectStreamClass.invokeReadObject(ObjectS treamClass.java(Compiled
Code))
at
java.io.ObjectInputStream.readSerialData(ObjectInp utStream.java(Compiled
Code))
at
java.io.ObjectInputStream.readOrdinaryObject(Objec tInputStream.java(Compiled
Code))
at
java.io.ObjectInputStream.readObject0(ObjectInputS tream.java(Compiled
Code))
at
java.io.ObjectInputStream.readObject(ObjectInputSt ream.java(Compiled
Code))
at
com.ibm.ws.drs.message.DRSCacheMsgImpl.readExterna l(DRSCacheMsgImpl.java(Compiled
Code))
at
java.io.ObjectInputStream.readExternalData(ObjectI nputStream.java(Compiled
Code))
at
java.io.ObjectInputStream.readOrdinaryObject(Objec tInputStream.java(Compiled
Code))
at
java.io.ObjectInputStream.readObject0(ObjectInputS tream.java(Compiled
Code))
at
java.io.ObjectInputStream.readObject(ObjectInputSt ream.java(Compiled
Code))
at
com.ibm.ws.drs.message.DRSMessageHelper.extractDCM (DRSMessageHelper.java(Compiled
Code))
at com.ibm.ws.drs.ha.DRSAgentClassEvents
$2.run(DRSAgentClassEvents.java:657)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.j ava(Compiled
Code))

[4/23/07 9:41:59:168 EDT] 000000c4 SystemErr R at
java.io.DataInputStream.readFully(DataInputStream. java(Compiled Code))
[4/23/07 9:41:59:168 EDT] 000000c4 SystemErr R at
java.io.DataInputStream.readInt(DataInputStream.ja va(Compiled Code))
[4/23/07 9:41:59:168 EDT] 000000c4 SystemErr R at
java.io.ObjectInputStream
$BlockDataInputStream.readInt(ObjectInputStream.ja va(Inlined Compiled
Code))
[4/23/07 9:41:59:168 EDT] 000000c4 SystemErr R at
java.io.ObjectInputStream.readInt(ObjectInputStrea m.java(Compiled
Code))
[4/23/07 9:41:59:168 EDT] 000000c4 SystemErr R at
com.ibm.ws.webcontainer.httpsession.HttpSessDRSBuf fWrapper.readExternal(HttpSessDRSBuffWrapper.java( Compiled
Code))
[4/23/07 9:41:59:168 EDT] 000000c4 SystemErr R at
java.io.ObjectInputStream.readExternalData(ObjectI nputStream.java(Compiled
Code))
[4/23/07 9:41:59:168 EDT] 000000c4 SystemErr R at
java.io.ObjectInputStream.readOrdinaryObject(Objec tInputStream.java(Compiled
Code))
[4/23/07 9:41:59:168 EDT] 000000c4 SystemErr R at
java.io.ObjectInputStream.readObject0(ObjectInputS tream.java(Compiled
Code))
[4/23/07 9:41:59:168 EDT] 000000c4 SystemErr R at
java.io.ObjectInputStream.readObject(ObjectInputSt ream.java(Compiled
Code))
[4/23/07 9:41:59:168 EDT] 000000c4 SystemErr R at
java.util.Hashtable.readObject(Hashtable.java(Comp iled Code))
[4/23/07 9:41:59:168 EDT] 000000c4 SystemErr R at
sun.reflect.GeneratedMethodAccessor71.invoke(Unkno wn Source)
[4/23/07 9:41:59:168 EDT] 000000c4 SystemErr R at
sun.reflect.DelegatingMethodAccessorImpl.invoke(De legatingMethodAccessorImpl.java(Compiled
Code))
[4/23/07 9:41:59:168 EDT] 000000c4 SystemErr R at
java.lang.reflect.Method.invoke(Method.java(Compil ed Code))
[4/23/07 9:41:59:168 EDT] 000000c4 SystemErr R at
java.io.ObjectStreamClass.invokeReadObject(ObjectS treamClass.java(Compiled
Code))
[4/23/07 9:41:59:168 EDT] 000000c4 SystemErr R at
java.io.ObjectInputStream.readSerialData(ObjectInp utStream.java(Compiled
Code))
[4/23/07 9:41:59:168 EDT] 000000c4 SystemErr R at
java.io.ObjectInputStream.readOrdinaryObject(Objec tInputStream.java(Compiled
Code))
[4/23/07 9:41:59:168 EDT] 000000c4 SystemErr R at
java.io.ObjectInputStream.readObject0(ObjectInputS tream.java(Compiled
Code))
[4/23/07 9:41:59:168 EDT] 000000c4 SystemErr R at
java.io.ObjectInputStream.readObject(ObjectInputSt ream.java(Compiled
Code))
[4/23/07 9:41:59:168 EDT] 000000c4 SystemErr R at
com.ibm.ws.drs.message.DRSCacheMsgImpl.readExterna l(DRSCacheMsgImpl.java(Compiled
Code))
[4/23/07 9:41:59:168 EDT] 000000c4 SystemErr R at
java.io.ObjectInputStream.readExternalData(ObjectI nputStream.java(Compiled
Code))
[4/23/07 9:41:59:168 EDT] 000000c4 SystemErr R at
java.io.ObjectInputStream.readOrdinaryObject(Objec tInputStream.java(Compiled
Code))
[4/23/07 9:41:59:168 EDT] 000000c4 SystemErr R at
java.io.ObjectInputStream.readObject0(ObjectInputS tream.java(Compiled
Code))
[4/23/07 9:41:59:168 EDT] 000000c4 SystemErr R at
java.io.ObjectInputStream.readObject(ObjectInputSt ream.java(Compiled
Code))
[4/23/07 9:41:59:168 EDT] 000000c4 SystemErr R at
com.ibm.ws.drs.message.DRSMessageHelper.extractDCM (DRSMessageHelper.java(Compiled
Code))
[4/23/07 9:41:59:168 EDT] 000000c4 SystemErr R at
com.ibm.ws.drs.ha.DRSAgentClassEvents$2.run(DRSAge ntClassEvents.java:
657)
[4/23/07 9:41:59:168 EDT] 000000c4 SystemErr R at
com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.j ava(Compiled Code))

Has anyone seen this before or know what the cause might be?

Thanks.