[jira] [Created] (AMBARI-13934) Ensure upgrade request is un-affected if there exists a stage with no tasks

["Siddharth Wagle (JIRA)" <ji...@apache.org>]

Siddharth Wagle created AMBARI-13934:
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             Summary: Ensure upgrade request is un-affected if there exists a stage with no tasks
                 Key: AMBARI-13934
                 URL: https://issues.apache.org/jira/browse/AMBARI-13934
             Project: Ambari
          Issue Type: Task
          Components: ambari-server
    Affects Versions: 2.1.2
            Reporter: Siddharth Wagle
            Assignee: Siddharth Wagle
             Fix For: 2.1.3


When you delete a host, it will delete all associated host_role_commands. During upgrade, if a host is deleted, then it is possible to have a Stage within the Upgrade request to have no tasks. Verify that it does not affect the upgrade operations.

Possible issues:
* A stage with no tasks should be declared as COMPLETED if not then it may result in the failure of the request
* Some host_role_command (tasks) may be read once and then cached. Such cache, if they exist need to be refreshed



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