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From "Gopal V (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-13108) Operators: SORT BY randomness is not safe with network partitions
Date Thu, 03 Mar 2016 19:48:18 GMT

    [ https://issues.apache.org/jira/browse/HIVE-13108?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15178497#comment-15178497
] 

Gopal V commented on HIVE-13108:
--------------------------------

Nobody has reported this issue yet, but it is a low-risk change for a problem which is nearly
impossible to detect.

> Operators: SORT BY randomness is not safe with network partitions
> -----------------------------------------------------------------
>
>                 Key: HIVE-13108
>                 URL: https://issues.apache.org/jira/browse/HIVE-13108
>             Project: Hive
>          Issue Type: Bug
>          Components: Spark, Tez
>    Affects Versions: 1.3.0, 1.2.1, 2.0.0, 2.0.1
>            Reporter: Gopal V
>            Assignee: Gopal V
>             Fix For: 1.3.0, 2.1.0
>
>         Attachments: HIVE-13108.1.patch
>
>
> SORT BY relies on a transient Random object, which is initialized once per deserialize
operation.
> This results in complications during a network partition and when Tez/Spark reuses a
cached plan.



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