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From "Billie Rinaldi (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-5855) DELETE call sometimes returns success when app is not deleted
Date Tue, 08 Nov 2016 17:34:58 GMT
Billie Rinaldi created YARN-5855:

             Summary: DELETE call sometimes returns success when app is not deleted
                 Key: YARN-5855
                 URL: https://issues.apache.org/jira/browse/YARN-5855
             Project: Hadoop YARN
          Issue Type: Sub-task
            Reporter: Billie Rinaldi
            Assignee: Gour Saha

Looking into this issue with [~gsaha], we noticed that multiple things can contribute to an
app continuing to run after a DELETE call, which consists of a stop and a destroy operation.
One problem is that the stop call is asynchronous unless a force flag is set. Without the
force flag, a message is sent to the AM and success is returned, and with the flag yarnClient.killRunningApplication
is called. (There is also an option to wait for a fixed amount of time for the app to stop
before returning, but DELETE is not setting this option and force is preferable in this case.)
The other issue is that the destroy operation is attempted in a loop, but if the number of
retries is exceeded the call returns a 204 response.

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