ambari/ambari-web/app/assets/data/wizard/deploy/poll_1.json

{
  "href" : "http://localhost:8080/api/clusters/mycluster/requests/1",
  "Requests" : {
    "id" : 1
  },
  "tasks" : [
    {
      "href" : "http://localhost:8080/api/clusters/mycluster/requests/1/tasks/1",
      "Tasks" : {
        "id" : "1",
        "attempt_cnt" : "0",
        "exit_code" : "999",
        "stdout" : "",
        "status" : "PENDING",
        "command" : "INSTALL",
        "start_time" : "-1",
        "role" : "DATANODE",
        "stderr" : "",
        "host_name" : "localhost.localdomain",
        "stage_id" : "1"
      }
    },
    {
      "href" : "http://localhost:8080/api/clusters/mycluster/requests/1/tasks/2",
      "Tasks" : {
        "id" : "2",
        "attempt_cnt" : "0",
        "exit_code" : "999",
        "stdout" : "",
        "status" : "PENDING",
        "command" : "INSTALL",
        "start_time" : "-1",
        "role" : "NAMENODE",
        "stderr" : "",
        "host_name" : "localhost.localdomain",
        "stage_id" : "1"
      }
    },
    {
      "href" : "http://localhost:8080/api/clusters/mycluster/requests/1/tasks/3",
      "Tasks" : {
        "id" : "3",
        "attempt_cnt" : "0",
        "exit_code" : "999",
        "stdout" : "",
        "status" : "PENDING",
        "command" : "INSTALL",
        "start_time" : "-1",
        "role" : "SECONDARY_NAMENODE",
        "stderr" : "",
        "host_name" : "host2",
        "stage_id" : "1"
      }
    }
  ]
}