Greg Mann created MESOS-8576:

             Summary: Improve discard handling of 'Docker::inspect()'
                 Key: MESOS-8576
             Project: Mesos
          Issue Type: Improvement
          Components: containerization, docker
    Affects Versions: 1.5.0
            Reporter: Greg Mann

In the call path of {{Docker::inspect()}}, each continuation currently checks 
if {{promise->future().hasDiscard()}}, where the {{promise}} is associated with 
the output of the {{docker inspect}} call. However, if the call to {{docker 
inspect}} becomes hung indefinitely, then continuations are never invoked, and 
a subsequent discard of the returned {{Future}} will have no effect. We should 
add proper {{onDiscard}} handling to that {{Future}} so that appropriate 
cleanup is performed in such cases.

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