The health test result for DATA_NODE_SCM_HEALTH has become bad.The roles process failed to start   Suddenly one of the Datanode of my production cluster started showing dead with above error. stopped and started the cloudera manager agent with command (service cloudera-scm-agent start/stop)  on the node but no go. Datanode service failing with error on start so its remain dead.   Can anyone help me Please. ... View more