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Posted to issues@hive.apache.org by "Jaume M (JIRA)" <ji...@apache.org> on 2018/11/03 00:11:00 UTC

[jira] [Updated] (HIVE-20853) Expose ShuffleHandler.registerDag in the llap daemon API

     [ https://issues.apache.org/jira/browse/HIVE-20853?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jaume M updated HIVE-20853:
---------------------------
    Attachment: HIVE-20853.1.patch
        Status: Patch Available  (was: Open)

> Expose ShuffleHandler.registerDag in the llap daemon API
> --------------------------------------------------------
>
>                 Key: HIVE-20853
>                 URL: https://issues.apache.org/jira/browse/HIVE-20853
>             Project: Hive
>          Issue Type: Improvement
>          Components: llap
>    Affects Versions: 3.1.0
>            Reporter: Jaume M
>            Assignee: Jaume M
>            Priority: Critical
>         Attachments: HIVE-20853.1.patch
>
>
> Currently DAGs are only registered when a submitWork is called for that DAG. At this point the crendentials are added to the ShuffleHandler and it can start serving.
> However Tez might (and will) schedule tasks to fetch from the ShuffleHandler before anything of this happens and all this tasks will fail which may results in the query failing.
> This happens in the scenario in which a LlapDaemon just comes up and tez fetchers try to open a connection before a DAG has been registered.
> Adding this API will allow to register the DAG against the Daemon when the AM notices that a new Daemon is up.



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