Billie Rinaldi created YARN-5855:
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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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