{
  "_comment": "a comment",
  "SECONDARY_NAMENODE-START": ["NAMENODE-START"],
  "DATANODE-STOP": ["JOBTRACKER-STOP", "TASKTRACKER-STOP", "RESOURCEMANAGER-STOP",
    "NODEMANAGER-STOP", "HISTORYSERVER-STOP", "HBASE_MASTER-STOP"],
  "SECONDARY_NAMENODE-UPGRADE": ["NAMENODE-UPGRADE"]
}