[HDFS-12473] Change hosts JSON file format

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.9.0, 3.0.0-beta1, 2.8.2, 3.1.0
• Hadoop Flags: Reviewed
• Assignee: Ming Ma
• Reporter: Ming Ma
• Created: 15/Sep/17 21:05
• Updated: 21/Sep/17 21:18
• Resolved: 20/Sep/17 16:30

Description

The existing host JSON file format doesn't have a top-level token.

  {"hostName": "host1"}
  {"hostName": "host2", "upgradeDomain": "ud0"}
  {"hostName": "host3", "adminState": "DECOMMISSIONED"}
  {"hostName": "host4", "upgradeDomain": "ud2", "adminState": "DECOMMISSIONED"}
  {"hostName": "host5", "port": 8090}
  {"hostName": "host6", "adminState": "IN_MAINTENANCE"}
  {"hostName": "host7", "adminState": "IN_MAINTENANCE", "maintenanceExpireTimeInMS": "112233"}

Instead, to conform with the JSON standard it should be like

[
  {"hostName": "host1"},
  {"hostName": "host2", "upgradeDomain": "ud0"},
  {"hostName": "host3", "adminState": "DECOMMISSIONED"},
  {"hostName": "host4", "upgradeDomain": "ud2", "adminState": "DECOMMISSIONED"},
  {"hostName": "host5", "port": 8090},
  {"hostName": "host6", "adminState": "IN_MAINTENANCE"},
  {"hostName": "host7", "adminState": "IN_MAINTENANCE", "maintenanceExpireTimeInMS": "112233"}
]