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

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java.lang.NullPointerException:
at weblogic.drs.internal.DataReplicationService.registerSlave(DataReplicationService.java:276)
at weblogic.management.deploy.slave.SlaveDeployer.initialize(SlaveDeployer.java:265)
at weblogic.management.deploy.DeploymentManagerServerLifeCycleImpl.initialize(DeploymentManagerServerLifeCycleImpl.java:150)
at weblogic.t3.srvr.ServerLifeCycleList.initialize(ServerLifeCycleList.java:54)
at weblogic.t3.srvr.T3Srvr.initialize1(T3Srvr.java:756)
at weblogic.t3.srvr.T3Srvr.initialize(T3Srvr.java:589)
at weblogic.t3.srvr.T3Srvr.run(T3Srvr.java:277)
at weblogic.Server.main(Server.java:32)

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