Hello:   I have created CSD for a service by referring the following wiki page by cloudera https://github.com/cloudera/cm_ext/wiki/Service-Descriptor-Language-Reference.   This CSD service has three roles inside it. two non-worker and one worker roles. And I have configured those roles to take part in rolling restart, as per the wiki. But during up-gradation of CDH, I got exception as Failed due to java.lang.ClassCastException: com.cloudera.cmf.service.csd.components.DynamicServiceHandler cannot be cast to com.cloudera.cmf.service.RollingRestartProvidere   And in cloudera-scm-server logs I get logs:   2017-03-14 05:17:21,286 INFO CommandPusher:com.cloudera.server.cmf.CommandPusherThread: Hard stopping command DbCommand{id=5803, name=RollingRestart, cluster=cluster}. com.cloudera.cmf.command.CmdExecException: java.lang.ClassCastException: com.cloudera.cmf.service.csd.components.DynamicServiceHandler cannot be cast to com.cloudera.cmf.service.RollingRestartProvider at com.cloudera.cmf.command.flow.SeqFlowCmd.run(SeqFlowCmd.java:119) at com.cloudera.cmf.command.flow.SeqFlowCmd.update(SeqFlowCmd.java:249) at com.cloudera.cmf.command.CmdWorkCommand.update(CmdWorkCommand.java:140) at com.cloudera.server.cmf.CommandPusherThread.handleCommandInternal(CommandPusherThread.java:456) at com.cloudera.server.cmf.CommandPusherThread.handleCommandBatched(CommandPusherThread.java:269) at com.cloudera.server.cmf.CommandPusherThread.innerLoop(CommandPusherThread.java:188) at com.cloudera.server.cmf.CommandPusherThread.run(CommandPusherThread.java:156) Caused by: java.lang.ClassCastException: com.cloudera.cmf.service.csd.components.DynamicServiceHandler cannot be cast to com.cloudera.cmf.service.RollingRestartProvider at com.cloudera.cmf.cluster.RollingRestartClusterCommand.getPreSteps(RollingRestartClusterCommand.java:279) at com.cloudera.cmf.cluster.RollingRestartClusterCommand.access$100(RollingRestartClusterCommand.java:73) at com.cloudera.cmf.cluster.RollingRestartClusterCommand$FactoryMethodImpl.prepare(RollingRestartClusterCommand.java:504) at com.cloudera.cmf.cluster.RollingRestartCmdWork$InitState.runStep(RollingRestartCmdWork.java:445) at com.cloudera.cmf.cluster.RollingRestartCmdWork.doWork(RollingRestartCmdWork.java:150) at com.cloudera.cmf.command.flow.CmdStep.doWork(CmdStep.java:164) at com.cloudera.cmf.command.flow.SeqCmdWork.doWork(SeqCmdWork.java:101) at com.cloudera.cmf.command.flow.SeqCmdWork.update(SeqCmdWork.java:174) at com.cloudera.cmf.command.flow.CmdStep.doWork(CmdStep.java:167) at com.cloudera.cmf.command.flow.SeqFlowCmd.run(SeqFlowCmd.java:117) ... View more