[jira] [Created] (FLINK-10990) Pre-check timespan in meterview to avoid NAN

[Shang Yuanchun (Jira)]

aitozi created FLINK-10990:
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             Summary: Pre-check timespan in meterview to avoid NAN
                 Key: FLINK-10990
                 URL: https://issues.apache.org/jira/browse/FLINK-10990
             Project: Flink
          Issue Type: Bug
          Components: Metrics
    Affects Versions: 1.7.0
            Reporter: aitozi
            Assignee: aitozi
             Fix For: 1.7.0


In the metric tool MeterView. If user use the meterview with the timespan smaller than UPDATE_INTERVAL_SECONDS = 5 , the getRate will always return 0/0 = NAN. And this is not friendly , I think we should pre-check it.



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