[YARN-7955] Calling stop on an already stopped service says "Successfully stopped service"

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.1.0
• Fix Version/s: 3.1.0
• Assignee: Gour Saha
• Reporter: Gour Saha
• Created: 21/Feb/18 19:49
• Updated: 19/Mar/18 18:33
• Resolved: 28/Feb/18 23:06

Description

If you invoke "yarn app -stop <service_name>" on an already stopped service it confusingly responds with message "Successfully stopped service <service_name>". It should say "Service is already stopped".

The same is seen with the REST API PUT request with data { "state": "STOPPED"}, the response is 200 OK and diagnostics with same message "Successfully stopped service <service_name>". It should return 400 Bad Request with message "Service is already stopped".