[jira] [Updated] (MESOS-295) Allow new masters to have better understanding of cluster state

["Benjamin Mahler (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/MESOS-295?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Benjamin Mahler updated MESOS-295:
----------------------------------

    Priority: Critical  (was: Major)
    
> Allow new masters to have better understanding of cluster state
> ---------------------------------------------------------------
>
>                 Key: MESOS-295
>                 URL: https://issues.apache.org/jira/browse/MESOS-295
>             Project: Mesos
>          Issue Type: Bug
>            Reporter: Joe Smith
>            Priority: Critical
>
> If a new master becomes elected, it will only have knowledge of the current state of the cluster. This can lead to a situation where tasks become lost but aren't properly killed. For instance:
> 1) A set of machines (perhaps a datacenter rack) lose network connectivity and their tasks are marked LOST by the master. However, they're still running.
> 2) Through a potentially unrelated situation, there is a master failover to a new master
> 3) The network connection to the machines come back up
> 4) These slaves never killed their tasks (and they shouldn't if they can't talk to a master)
> 5) Tasks stay running and aren't killed, taking up resources and running outside the scope of the new master

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