[jira] [Created] (FLINK-12987) DescriptiveStatisticsHistogram#getCount does not return the number of elements seen

[Shang Yuanchun (Jira)]

Nico Kruber created FLINK-12987:
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             Summary: 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: 1.8.0, 1.7.2, 1.6.4
            Reporter: Nico Kruber
            Assignee: Nico Kruber


{{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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