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From "Thejas M Nair (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-12077) MSCK Repair table should fix partitions in batches
Date Thu, 01 Sep 2016 15:50:20 GMT

    [ https://issues.apache.org/jira/browse/HIVE-12077?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15455819#comment-15455819
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Thejas M Nair commented on HIVE-12077:
--------------------------------------

There is a bug in this patch. 
Lets say bactch_size = 5, and no of partitions = 9, it will skip the last 4 partitions from
being added.


> MSCK Repair table should fix partitions in batches 
> ---------------------------------------------------
>
>                 Key: HIVE-12077
>                 URL: https://issues.apache.org/jira/browse/HIVE-12077
>             Project: Hive
>          Issue Type: Bug
>          Components: Hive
>            Reporter: Ryan P
>            Assignee: Chinna Rao Lalam
>             Fix For: 2.2.0
>
>         Attachments: HIVE-12077.1.patch, HIVE-12077.2.patch, HIVE-12077.3.patch, HIVE-12077.4.patch,
HIVE-12077.5.patch
>
>
> If a user attempts to run MSCK REPAIR TABLE on a directory with a large number of untracked
partitions HMS will OOME. I suspect this is because it attempts to do one large bulk load
in an effort to save time. Ultimately this can lead to a collection so large in size that
HMS eventually hits an Out of Memory Exception. 
> Instead I suggest that Hive include a configurable batch size that HMS can use to break
up the load. 



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