java.lang.NullPointerException: This exception has no message.

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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(ReplicationManager.java:633)
at weblogic.cluster.replication.ReplicationManager.getPrimary(ReplicationManager.java:608)
at weblogic.cluster.replication.ReplicationManager.lookup(ReplicationManager.java:365)
at weblogic.servlet.internal.session.ReplicatedSessionContext.getSessionInternal(ReplicatedSessionContext.java:352)
at weblogic.servlet.internal.ServletRequestImpl$SessionHelper.getValidSession(ServletRequestImpl.java:2543)
at weblogic.servlet.internal.ServletRequestImpl$SessionHelper.getSessionInternal(ServletRequestImpl.java:2105)
at weblogic.servlet.internal.ServletRequestImpl$SessionHelper.getSession(ServletRequestImpl.java:2072)
at weblogic.servlet.security.internal.SecurityModule$SessionRetrievalAction.run(SecurityModule.java:554)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java: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(ServletSecurityManager.java:81)
at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.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)

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