[jira] [Resolved] (MESOS-530) A registered slave should check registration id when it receives mulitple re(re-)gistered messages from the master

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

     [ https://issues.apache.org/jira/browse/MESOS-530?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Vinod Kone resolved MESOS-530.
------------------------------

    Resolution: Fixed
    
> A registered slave should check registration id when it receives mulitple re(re-)gistered messages from the master
> ------------------------------------------------------------------------------------------------------------------
>
>                 Key: MESOS-530
>                 URL: https://issues.apache.org/jira/browse/MESOS-530
>             Project: Mesos
>          Issue Type: Bug
>    Affects Versions: 0.13.0
>            Reporter: Vinod Kone
>            Assignee: Vinod Kone
>             Fix For: 0.13.0
>
>
> We have seen this in production at Twitter
> Timeline of events:
> 06/26 06:46: Slave host rebooted
> 06/26 06:46.54: Slave registered (201305082239-1864771594-5050-8729-594) with master. But slave never got the ACK. Presumably there were network partition issues.
> 06/26 06:47.21: Slave disconnected from the master and the master removed the slave.
> 06/26 06:47.21: Immediately after, the master registered the slave with a new id (201305082239-1864771594-5050-8729-609).
> But the slave only received the old id (201305082239-1864771594-5050-8729-594)!!! So there is a mismatch between the slave id known to the master and the slave!
> Currently the slave silently ignores a (re-)registration message from the master if it is already (re-)registered. This was originally designed to ignore duplicate (re-)registered messages sent by the master. But clearly it doesn't catch the above edge case.

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