[jira] [Created] (MESOS-8469) Mesos master might drop some events in the operator API stream

["Vinod Kone (JIRA)" <ji...@apache.org>]

Vinod Kone created MESOS-8469:
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             Summary: Mesos master might drop some events in the operator API stream
                 Key: MESOS-8469
                 URL: https://issues.apache.org/jira/browse/MESOS-8469
             Project: Mesos
          Issue Type: Bug
            Reporter: Vinod Kone
            Assignee: Greg Mann


Inside `Master::updateTask`, we call `Subscribers::send` which asynchronously calls `Subscribers::Subscriber::send` on each subscriber.

But the problem is that inside `Subscribers:Subscriber::send` we are looking up the state of the master (e.g., getting Task* and Framework*) which might have changed between `Subscribers::send ` and `Subscribers::Subscriber::send`.

 

For example, if a terminal task received an acknowledgement the task might be removed from master's state, causing us to drop the TASK_UPDATED event.

 

We noticed this in an internal cluster, where a TASK_KILLED update was sent to one subscriber but not the other.

 

 

 



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