[jira] [Updated] (HBASE-22045) Mutable range histogram reports incorrect outliers

["Abhishek Singh Chouhan (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-22045?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Abhishek Singh Chouhan updated HBASE-22045:
-------------------------------------------
    Status: Patch Available  (was: Open)

> Mutable range histogram reports incorrect outliers
> --------------------------------------------------
>
>                 Key: HBASE-22045
>                 URL: https://issues.apache.org/jira/browse/HBASE-22045
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 2.1.3, 1.4.9, 2.0.0, 1.3.3, 1.5.0, 3.0.0, 2.2.1
>            Reporter: Abhishek Singh Chouhan
>            Assignee: Abhishek Singh Chouhan
>            Priority: Major
>         Attachments: HBASE-22045.master.001.patch
>
>
> MutableRangeHistogram during the snapshot calculates the outliers (eg. mutate_TimeRange_600000-inf) and adds the counter with incorrect calculation by using the overall count of event and not the number of events in the snapshot.
> {code:java}
>     long val = histogram.getCount();
>     if (val - cumNum > 0) {
>       metricsRecordBuilder.addCounter(
>           Interns.info(name + "_" + rangeType + "_" + ranges[ranges.length - 1] + "-inf", desc),
>           val - cumNum);
>     }{code}



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