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java.lang.NullPointerException: 	at oracle.iam.oimupgrade.mdstransferlisteners.util.CommonUtil.readmetadataMergeClassMap(CommonUtil.java:369)	at oracle.iam.oimupgrade.mdstransferlisteners.util.ListenerUtil.postOperation(ListenerUtil.java:148)	at oracle.iam.oimupgrade.mdstransferlisteners.EntityTranferListener.postOperation(EntityTranferListener.java:70)	at oracle.mds.internal.transfer.InternalMDSTransfer$1.run(InternalMDSTransfer.java:2183)	at java.security.AccessController.doPrivileged(Native Method)	at oracle.mds.internal.transfer.InternalMDSTransfer.postOperation(InternalMDSTransfer.java:2179)	at oracle.mds.internal.transfer.InternalMDSTransfer.execute(InternalMDSTransfer.java:1888)	at oracle.mds.internal.transfer.InternalMDSTransfer.transfer(InternalMDSTransfer.java:471)	at oracle.mds.internal.lcm.deploy.DeployManager.doTransfer(DeployManager.java:1574)	at oracle.mds.internal.lcm.deploy.DeployManager.invokeTransfer(DeployManager.java:1455)	at oracle.mds.internal.lcm.deploy.DeployManager.deployToDBRepository(DeployManager.java:1232)	at oracle.mds.internal.lcm.deploy.DeployManager.deploySingleMAR(DeployManager.java:897)	at oracle.mds.internal.lcm.deploy.DeployManager.deploy(DeployManager.java:713)	at oracle.mds.internal.lcm.deploy.DeployManager.startDeployment(DeployManager.java:204)	at oracle.mds.internal.lcm.MDSLifecycleListenerImpl.start(MDSLifecycleListenerImpl.java:215)	at oracle.mds.lcm.weblogic.WLLifecycleListener.preStart(WLLifecycleListener.java:77)	at weblogic.application.internal.flow.BaseLifecycleFlow$PreStartAction.run(BaseLifecycleFlow.java:282)	at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)	at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)	at weblogic.application.internal.flow.BaseLifecycleFlow$LifecycleListenerAction.invoke(BaseLifecycleFlow.java:199)	at weblogic.application.internal.flow.BaseLifecycleFlow.preStart(BaseLifecycleFlow.java:62)	at weblogic.application.internal.flow.HeadLifecycleFlow.prepare(HeadLifecycleFlow.java:283)	at weblogic.application.internal.BaseDeployment$1.next(BaseDeployment.java:613)	at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:52)	at weblogic.application.internal.BaseDeployment.prepare(BaseDeployment.java:184)	at weblogic.application.internal.EarDeployment.prepare(EarDeployment.java:58)	at weblogic.application.internal.DeploymentStateChecker.prepare(DeploymentStateChecker.java:154)	at weblogic.deploy.internal.targetserver.AppContainerInvoker.prepare(AppContainerInvoker.java:60)	at weblogic.deploy.internal.targetserver.AppDeployment.prepare(AppDeployment.java:141)	at weblogic.management.deploy.internal.DeploymentAdapter$1.doPrepare(DeploymentAdapter.java:39)	at weblogic.management.deploy.internal.DeploymentAdapter.prepare(DeploymentAdapter.java:191)	at weblogic.management.deploy.internal.AppTransition$1.transitionApp(AppTransition.java:21)	at weblogic.management.deploy.internal.ConfiguredDeployments.transitionApps(ConfiguredDeployments.java:261)	at weblogic.management.deploy.internal.ConfiguredDeployments.transitionApps(ConfiguredDeployments.java:220)	at weblogic.management.deploy.internal.ConfiguredDeployments.prepare(ConfiguredDeployments.java:165)	at weblogic.management.deploy.internal.ConfiguredDeployments.deploy(ConfiguredDeployments.java:122)	at weblogic.management.deploy.internal.DeploymentServerService.resume(DeploymentServerService.java:180)	at weblogic.management.deploy.internal.DeploymentServerService.start(DeploymentServerService.java:96)	at weblogic.t3.srvr.SubsystemRequest.run(SubsystemRequest.java:64)	at weblogic.work.SelfTuningWorkManagerImpl$WorkAdapterImpl.run(SelfTuningWorkManagerImpl.java:528)	at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209)	at weblogic.work.ExecuteThread.run(ExecuteThread.java:178)