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Date: Fri, 8 Dec 2017 23:06:00 +0000 (UTC)
From: "James Peach (JIRA)" <jira@apache.org>
To: issues@mesos.apache.org
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Subject: [jira] [Created] (MESOS-8317) Check failed when newly registered
 executor has launched tasks.
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archived-at: Fri, 08 Dec 2017 23:06:03 -0000

James Peach created MESOS-8317:
----------------------------------

             Summary: Check failed when newly registered executor has launched tasks.
                 Key: MESOS-8317
                 URL: https://issues.apache.org/jira/browse/MESOS-8317
             Project: Mesos
          Issue Type: Bug
            Reporter: James Peach


This check in {{slave/slave.cpp}} can fail:

{code}
   4105       if (state != RECOVERING &&
   4106           executor->queuedTasks.empty() &&
   4107           executor->queuedTaskGroups.empty()) {
   4108         CHECK(executor->launchedTasks.empty())
   4109             << " Newly registered executor '" << executor->id
   4110             << "' has launched tasks";
   4111 
   4112         LOG(WARNING) << "Shutting down the executor " << *executor
   4113                      << " because it has no tasks to run";
   4114 
   4115         _shutdownExecutor(framework, executor);
   4116 
   4117         return;
   4118       }
{code}

This happens with the following sequence of events:

1. HTTP executor subscribes
2. Agent sends a LAUNCH message that the executor can't decode
3. HTTP executor closes the channel and re-subscribes
4. Agent hits the above check because the executor sends and empty task list (it never understood the LAUNCH message), but the agent thinks that a task should have been launched.


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