WLS 9.2MP1 ReplicationManager Exception

Hello,

We have two Weblogic 9.2MP1 nodes in a cluster environment and we get almost
daily these kinds of exceptions:

####<2.4.2008 11:24:33 EEST> <Warning> <RMI>
<testserver1-zone1> <test_1_A> 
<[STANDBY] ExecuteThread: '7' for queue: 'weblogic.kernel.Default
(self-tuning)'> <<WLS Kernel>> <> <>
 <1207124673671> <BEA-080003> <RuntimeException thrown by rmi
server: 
weblogic.cluster.replication.ReplicationManager.create(Lweblogic.rmi.spi.HostID;
ILweblogic.cluster.replication.ROID;Lweblogic.cluster.replication.Replicatable;}

 java.lang.NullPointerException.
java.lang.NullPointerException
	at weblogic.cluster.replication.WrappedRO.addRO(WrappedRO.java:49)
	at
weblogic.cluster.replication.ReplicationManager$wroManager.create(ReplicationMan
ager.java:288)
	at
weblogic.cluster.replication.ReplicationManager.create(ReplicationManager.java:7
79)
	at weblogic.cluster.replication.ReplicationManager_WLSkel.invoke(Unknown
Source)
	at weblogic.rmi.internal.BasicServerRef.invoke(BasicServerRef.java:548)
	at weblogic.rmi.internal.BasicServerRef$1.run(BasicServerRef.java:438)
	at
weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.ja
va:363)
	at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:147)
	at weblogic.rmi.internal.BasicServerRef.handleRequest(BasicServerRef.java:434)
	at weblogic.rmi.internal.BasicServerRef.access$300(BasicServerRef.java:57)
	at
weblogic.rmi.internal.BasicServerRef$BasicExecuteRequest.run(BasicServerRef.java
:965)
	at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209)
	at weblogic.work.ExecuteThread.run(ExecuteThread.java:181)
> 

####<2.4.2008 11:24:33 EEST> <Error> <HTTP Session>
<testserver2-zone1> <test_1_B> 
<[ACTIVE] ExecuteThread: '0' for queue: 'weblogic.kernel.Default
(self-tuning)'> <<anonymous>> <> <> 
<1207124673730> <BEA-100049> <Error looking up session with
id:SLG1Hz9dzfcgsyddb2JT11hnlDXpJbqLTnnTnvXvDMGpmMP12TnL!-1761604500!545819469
java.lang.NullPointerException
        at weblogic.rjvm.ResponseImpl.unmarshalReturn(ResponseImpl.java:195)
        at weblogic.rmi.internal.BasicRemoteRef.invoke(BasicRemoteRef.java:224)
        at
weblogic.cluster.replication.ReplicationManager_921_WLStub.create(Unknown
Source)
        at
weblogic.cluster.replication.ReplicationManager.trySecondary(ReplicationManager.
java:661)
        at
weblogic.cluster.replication.ReplicationManager.createSecondary(ReplicationManag
er.java:633)
        at
weblogic.cluster.replication.ReplicationManager.getPrimary(ReplicationManager.ja
va:608)
        at
weblogic.cluster.replication.ReplicationManager.lookup(ReplicationManager.java:3
65)
        at
weblogic.servlet.internal.session.ReplicatedSessionContext.getSessionInternal(Re
plicatedSessionContext.java:352)
        at
weblogic.servlet.internal.ServletRequestImpl$SessionHelper.getValidSession(Servl
etRequestImpl.java:2543)
        at
weblogic.servlet.internal.ServletRequestImpl$SessionHelper.getSessionInternal(Se
rvletRequestImpl.java:2105)
        at
weblogic.servlet.internal.ServletRequestImpl$SessionHelper.getSession(ServletReq
uestImpl.java:2072)
        at
weblogic.servlet.internal.ServletRequestImpl.getSession(ServletRequestImpl.java:
1204)
        at
weblogic.servlet.security.internal.SecurityModule$SessionRetrievalAction.run(Sec
urityModule.java:554)
        at
weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.ja
va:321)
        at
weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
        at
weblogic.servlet.security.internal.SecurityModule.getUserSession(SecurityModule.
java:445)
        at
weblogic.servlet.security.internal.ServletSecurityManager.checkAccess(ServletSec
urityManager.java:81)
        at
weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletConte
xt.java:1939)
        at
weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java
:1909)
        at
weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1359)
        at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209)
        at weblogic.work.ExecuteThread.run(ExecuteThread.java:181)
java.lang.NullPointerException
        at weblogic.cluster.replication.WrappedRO.addRO(WrappedRO.java:49)
        at
weblogic.cluster.replication.ReplicationManager$wroManager.create(ReplicationMan
ager.java:288)
        at
weblogic.cluster.replication.ReplicationManager.create(ReplicationManager.java:7
79)
        at weblogic.cluster.replication.ReplicationManager_WLSkel.invoke(Unknown
Source)
        at weblogic.rmi.internal.BasicServerRef.invoke(BasicServerRef.java:548)
        at weblogic.rmi.internal.BasicServerRef$1.run(BasicServerRef.java:438)
        at
weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.ja
va:363)
        at
weblogic.security.service.SecurityManager.runAs(SecurityManager.java:147)
        at
weblogic.rmi.internal.BasicServerRef.handleRequest(BasicServerRef.java:434)
        at
weblogic.rmi.internal.BasicServerRef.access$300(BasicServerRef.java:57)
        at
weblogic.rmi.internal.BasicServerRef$BasicExecuteRequest.run(BasicServerRef.java
:965)
        at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209)
        at weblogic.work.ExecuteThread.run(ExecuteThread.java:181)


Have we configured our cluster wrong? Our deployed apps to blame? Any info