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Posted to issues@hive.apache.org by "Jaume M (JIRA)" <ji...@apache.org> on 2018/11/01 17:19:01 UTC
[jira] [Assigned] (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 reassigned HIVE-20853:
------------------------------
Assignee: Jaume M
> 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
>
> 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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