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https://issues.apache.org/jira/browse/FLINK-1599?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14940398#comment-14940398
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ASF GitHub Bot commented on FLINK-1599:
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Github user hsaputra commented on the pull request:
https://github.com/apache/flink/pull/1207#issuecomment-144846200
+1
Test fail on StormWordCountLocalITCase not related to the changes.
> TypeComperator with no keys and comparators matches some elements
> -----------------------------------------------------------------
>
> Key: FLINK-1599
> URL: https://issues.apache.org/jira/browse/FLINK-1599
> Project: Flink
> Issue Type: Bug
> Components: Distributed Runtime
> Affects Versions: 0.8.0
> Reporter: Maximilian Michels
> Priority: Minor
>
> If you create a custom type comparator by subclassing {{TypeComperator}} and
> implement {{int extractKeys(Object record, Object[] target, int index)}} and
> {{TypeComparator[] getFlatComparators()}} to return 0 and no type comparators
> respectively, the {{coGroup}} operator (possibly others) find matching
> elements although no comparators have been specified.
> In this case, the expected behavior for a CoGroup would be that only elements
> from one side are supplied in the CoGroup method.
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