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https://issues.apache.org/jira/browse/FLINK-5104?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15749452#comment-15749452
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ASF GitHub Bot commented on FLINK-5104:
---------------------------------------

Github user greghogan commented on the issue:

    https://github.com/apache/flink/pull/2985
  
    @mushketyk the build is failing due to unused imports (IntelliJ can be 
configured to automatically remove these).
    
    There are so many ways to implement the validator. Projections would reduce 
the data to be transmitted and sorted. I like to document when we are 
performing a different kind of join (here, an anti-join) for the day when these 
are available in Flink. I don't know how counting in the `FlatJoinFunction` 
followed by two `DiscardingOutputFormat` compares with the current 
implementation of a union and count (which is a dummy `OutputFormat`).
    
    We'll need to rebase this PR once FLINK-5311 has been committed.


> Implement BipartiteGraph validator
> ----------------------------------
>
>                 Key: FLINK-5104
>                 URL: https://issues.apache.org/jira/browse/FLINK-5104
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Gelly
>            Reporter: Ivan Mushketyk
>            Assignee: Ivan Mushketyk
>
> BipartiteGraph should have a validator similar to GraphValidator for Graph 
> class.



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