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https://issues.apache.org/jira/browse/MESOS-5566?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15320666#comment-15320666
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Vinod Kone commented on MESOS-5566:
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I think `SchedulerDriver::reconcile()` using TaskStatus was a bad idea in
retrospect, rather than `TaskStatus` having a required `state` field. The v1
scheduler API fixes this by not using TaskStatus for RECONCILE call.
> Make "state" field of TaskStatus optional
> -----------------------------------------
>
> Key: MESOS-5566
> URL: https://issues.apache.org/jira/browse/MESOS-5566
> Project: Mesos
> Issue Type: Improvement
> Components: general
> Reporter: Neil Conway
> Priority: Minor
> Labels: mesosphere, newbie
>
> The {{SchedulerDriver}} interface uses a vector of {{TaskStatus}} for task
> reconciliation: the framework sends a list of taskIDs (with optional agent
> IDs), and the master replies with their current task statuses. Right now,
> frameworks also need to specify the {{state}} field of the input
> {{TaskStatus}}, because {{state}} is a {{required}} field. It would be
> cleaner to make {{state}} optional, because otherwise this makes the
> interface confusing.
> After doing this, we should remove the places where we set the {{state}}
> field when making reconciliation requests, e.g., in various test cases.
> See discussion in https://reviews.apache.org/r/48250/
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