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From "Sergey Shelukhin (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-12856) LLAP: update (add/remove) the UDFs available in LLAP when they are changed; also refresh periodically
Date Wed, 20 Jan 2016 02:04:39 GMT

     [ https://issues.apache.org/jira/browse/HIVE-12856?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sergey Shelukhin updated HIVE-12856:
------------------------------------
    Description: I don't think re-querying the functions is going to scale, and the sessions
obviously cannot notify all LLAP clusters of every change. We should add versioning to metastore
functions to track changes, and then possibly add a notification mechanism, potentially thru
ZK to avoid overloading the metastore itself.

> LLAP: update (add/remove) the UDFs available in LLAP when they are changed; also refresh
periodically
> -----------------------------------------------------------------------------------------------------
>
>                 Key: HIVE-12856
>                 URL: https://issues.apache.org/jira/browse/HIVE-12856
>             Project: Hive
>          Issue Type: Sub-task
>            Reporter: Sergey Shelukhin
>            Assignee: Sergey Shelukhin
>
> I don't think re-querying the functions is going to scale, and the sessions obviously
cannot notify all LLAP clusters of every change. We should add versioning to metastore functions
to track changes, and then possibly add a notification mechanism, potentially thru ZK to avoid
overloading the metastore itself.



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