lincoln.lee created FLINK-5883:
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Summary: 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
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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