Wang Cheng commented on KYLIN-3278:

I will revert the relevant commits of KYLIN-3084, and use "set 
hive.merge.tezfiles to true" to workaround the TEZ UNION ALL issue.

> Kylin should not distribute hive table by random at Step1
> ---------------------------------------------------------
>                 Key: KYLIN-3278
>                 URL: https://issues.apache.org/jira/browse/KYLIN-3278
>             Project: Kylin
>          Issue Type: Improvement
>          Components: Job Engine
>    Affects Versions: v2.3.0
>            Reporter: Chuqian Yu
>            Assignee: Wang Cheng
>            Priority: Major
> Hi,Kylin team.
> When I upgrade from 2.2.0 to 2.3.0 ,I found that the step.1 "Create 
> Intermediate Flat Hive Table" of cube build was much slower than before, 
> because Kylin distribute hive table by random when created it in version 
> 2.3.0 . I wander is it necessary? Because 
> kylin.source.hive.redistribute-flat-table was set to true by default, so we 
> will do the distribution job at Step.2 "Redistribute Flat Hive Table".
> Best regards, 
>  Chuqian Yu

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