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From "Vinod Kone (JIRA)" <>
Subject [jira] [Created] (MESOS-305) Inform the framework about a master failover
Date Thu, 08 Nov 2012 22:48:11 GMT
Vinod Kone created MESOS-305:

             Summary: Inform the framework about a master failover
                 Key: MESOS-305
             Project: Mesos
          Issue Type: Improvement
            Reporter: Vinod Kone

With the recent changes in the master detecter code, we no longer send 'NoMasterDetected'
to the scheduler driver, which in turn means the 'disconnected' scheduler callback is never

At Twitter this manifested as a spew of LOST tasks whenever a master failover happens. This
is because the scheduler holds on to offers for a while and never knows about the invalidity
of offers, until after tasks are launched. Though this is a race, it is ideal to minimize
this window as much as possible by informing the scheduler of the master failover.

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