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https://issues.apache.org/jira/browse/FLINK-9385?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16814361#comment-16814361
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Ji Liu commented on FLINK-9385:
-------------------------------

Hi [~joshlemer], thanks for opening this issue, but I think one could calc 
records number of each input by upstream output records if it's really needed, 
redundant information may make the UI look messy. What do you think?

> Operators with two inputs should show "Records Received" in Web UI 
> separately, rather than added together
> ---------------------------------------------------------------------------------------------------------
>
>                 Key: FLINK-9385
>                 URL: https://issues.apache.org/jira/browse/FLINK-9385
>             Project: Flink
>          Issue Type: Task
>          Components: Runtime / Metrics, Runtime / Web Frontend
>            Reporter: Josh Lemer
>            Priority: Major
>
> In the Flink Web UI, there is a column in the Subtasks information view which 
> shows how many records each subtask has received. However, for subtasks such 
> as CoProcess operators which take two inputs, the number shown for "Records 
> Received" is the sum of the records received from the two upstream 
> datastreams. It would be much more helpful if it displayed the number of 
> records received from each of the two separately.



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