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https://issues.apache.org/jira/browse/TEZ-3819?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16126614#comment-16126614
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Zhiyuan Yang commented on TEZ-3819:
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[~gopalv] Thanks for pointing out this! I wasn't aware this in Hive. This means
the only skew we will get is from repeated rows which is better than repeated
keys.
> Round robin partitioner make fair cartesian product not fault tolerant
> ----------------------------------------------------------------------
>
> Key: TEZ-3819
> URL: https://issues.apache.org/jira/browse/TEZ-3819
> Project: Apache Tez
> Issue Type: Bug
> Reporter: Zhiyuan Yang
> Assignee: Zhiyuan Yang
> Attachments: TEZ-3819.patch
>
>
> In case of task failure and retry, round robin partitioner cannot give
> consistent partitioning, which can cause wrong output of fair cartesian
> product.
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