[jira] [Commented] (MESOS-1453) Update reconciliation semantics to take only task ids and send statuses for each task.

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

    [ https://issues.apache.org/jira/browse/MESOS-1453?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14017237#comment-14017237 ] 

Benjamin Hindman commented on MESOS-1453:
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Let's also update the low-level scheduler Call API to use TaskIDs rather than TaskStatus.

> Update reconciliation semantics to take only task ids and send statuses for each task.
> --------------------------------------------------------------------------------------
>
>                 Key: MESOS-1453
>                 URL: https://issues.apache.org/jira/browse/MESOS-1453
>             Project: Mesos
>          Issue Type: Improvement
>    Affects Versions: 0.19.0
>            Reporter: Benjamin Mahler
>             Fix For: 0.20.0
>
>
> Currently, we only reply to a reconciliation request when the task state differs. This makes it difficult for a framework to implement reconciliation: if the framework does not receive an update for the task, it cannot determine if this was because the state is valid, or the slave was transitioning, or the master has not recovered yet.
> As a consequence of this, frameworks looking to reconcile tasks need to continually retry at small intervals to compensate for the lack of ability to differentiate the cases listed above.
> A solution to this problem is update the reconciliation API to instead just send the task ids to be reconciled, and the master will send an update for all of the tasks, if possible. This means we no longer compare task states to determine when to send an update.



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