[jira] [Closed] (IGNITE-4637) Implement DDL operation completion protocol

["Vladimir Ozerov (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IGNITE-4637?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Vladimir Ozerov closed IGNITE-4637.
-----------------------------------

> Implement DDL operation completion protocol
> -------------------------------------------
>
>                 Key: IGNITE-4637
>                 URL: https://issues.apache.org/jira/browse/IGNITE-4637
>             Project: Ignite
>          Issue Type: Sub-task
>          Components: SQL
>            Reporter: Vladimir Ozerov
>            Assignee: Vladimir Ozerov
>             Fix For: 2.0
>
>
> *Normal flow*
> 1) When participating node completed operation, it sends {{PARTICIPANT_FINISHED}} message to coordinator.
> 2) When coordinator collected responses from all participants, it notifies originator with {{FINISHED}} request.
> 3) Originator responds coordinator with {{FINISHED_ACK}} message.
> 4) Coordinator responds to all peers with {{PARTICIPANT_FINISHED_ACK}} message.
> *Originator leave*
> 1) Coordinator marks originator as "notified", and sends {{PARTICIPANT_FINISHED_ACK}} message to participants after all {{PARTICIPANT_FINISHED}} are collected.
> *Participant leave*
> 1) Coordinator marks participant as "finished" and no longer waits for any responses from it.
> *Coordinator leave*
> 1) The oldest node among remaining participants is elected as new coordinator.
> 2) Coordinator *polls* explicitly operation state from participants with {{IS_PARTICIPANT_FINISHED}} message.
> 3) Participants re-send {{PARTICIPANT_FINISHED}} message to new coordinator.
> 4) If all participant nodes have left, originator feature is completed with error.



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