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https://issues.apache.org/jira/browse/FLINK-13099?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16878501#comment-16878501
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Biao Liu commented on FLINK-13099:
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Oops! The connection seems to be something wrong for a while. This ticket is
duplicated.
> Add a new type UNDEFINED of shuffle mode
> ----------------------------------------
>
> Key: FLINK-13099
> URL: https://issues.apache.org/jira/browse/FLINK-13099
> Project: Flink
> Issue Type: Improvement
> Components: API / DataStream
> Reporter: Biao Liu
> Assignee: Biao Liu
> Priority: Major
> Fix For: 1.9.0
>
>
> The {{UNDEFINED}} type is the default value of shuffle mode. If there is no
> specific {{PartitionTransformation}}, the shuffle mode would be {{UNDEFINED}}.
> This new shuffle type leaves some space for optimization later. The
> optimization might be based on resources or some global settings.
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