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https://issues.apache.org/jira/browse/FLINK-12987?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Nico Kruber updated FLINK-12987:
--------------------------------
    Affects Version/s: 1.9.0

> DescriptiveStatisticsHistogram#getCount does not return the number of 
> elements seen
> -----------------------------------------------------------------------------------
>
>                 Key: FLINK-12987
>                 URL: https://issues.apache.org/jira/browse/FLINK-12987
>             Project: Flink
>          Issue Type: Bug
>          Components: Runtime / Metrics
>    Affects Versions: 1.6.4, 1.7.2, 1.8.0, 1.9.0
>            Reporter: Nico Kruber
>            Assignee: Nico Kruber
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> {{DescriptiveStatisticsHistogram#getCount()}} returns the number of elements 
> in the current window and not the number of total elements seen over time. In 
> contrast, {{DropwizardHistogramWrapper}} does this correctly.
> We should unify the behaviour and add a unit test for it (there is no generic 
> histogram test yet).



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