[AMBARI-19473] Add Downgrade request validation to avoid accidental double-upgrades

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 2.5.0
• Fix Version/s: 2.5.0
• Component/s: ambari-server
• Assignee: Jonathan Hurley
• Reporter: Vivek Sharma
• Created: 11/Jan/17 21:26
• Updated: 20/Mar/17 22:08
• Resolved: 17/Jan/17 01:25

Description

There are currently several ways of starting upgrades / downgrades:

• The use of a directive on the request

  http://localhost:8080/api/v1/clusters/c1/upgrades?downgrade=true
  

• The POST body JSON

  {
  "RequestInfo": {
    "downgrade": "true"
    },
  "Upgrade":{
    "from_version": ...
   }
  }
  

The directive is confusing and can allow multiple downgrades or upgrades to be scheduled concurrently. It should be removed for consistency and the Upgrade/direction property should replace it.

Issue Links

• links to: Reviewboard