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https://issues.apache.org/jira/browse/FLINK-5883?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15927325#comment-15927325
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ASF GitHub Bot commented on FLINK-5883:
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Github user lincoln-lil commented on the issue:
https://github.com/apache/flink/pull/3392
Appreciated if someone can merge this pr
> Re-adding the Exception-thrown code for ListKeyGroupedIterator when the
> iterator is requested the second time
> -------------------------------------------------------------------------------------------------------------
>
> Key: FLINK-5883
> URL: https://issues.apache.org/jira/browse/FLINK-5883
> Project: Flink
> Issue Type: Improvement
> Components: DataSet API
> Reporter: lincoln.lee
> Assignee: lincoln.lee
>
> Originally, ListKeyGroupedIterator ensured that a TraversableOnceException
> was thrown when the iterator is requested the second time within FLINK-1023,
> it was lost from FLINK-1110 unexpectedly, so add it back.
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