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https://issues.apache.org/jira/browse/HBASE-25052?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17198089#comment-17198089
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Anoop Sam John commented on HBASE-25052:
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cc [~vjasani]
> FastLongHistogram#getCountAtOrBelow method is broken.
> -----------------------------------------------------
>
> Key: HBASE-25052
> URL: https://issues.apache.org/jira/browse/HBASE-25052
> Project: HBase
> Issue Type: Bug
> Components: metrics
> Affects Versions: 3.0.0-alpha-1, 2.3.0, 1.6.0, 2.2.3
> Reporter: Rushabh Shah
> Priority: Major
>
> FastLongHistogram#getCountAtOrBelow method is broken.
> If I revert HBASE-23245 then it works fine.
> Wrote a small test case in TestHistogramImpl.java :
> {code:java}
> @Test
> public void testAdd1() {
> HistogramImpl histogram = new HistogramImpl();
> for (int i = 0; i < 100; i++) {
> histogram.update(i);
> }
> Snapshot snapshot = histogram.snapshot();
> // This should return count as 6 since we added 0, 1, 2, 3, 4, 5
> Assert.assertEquals(6, snapshot.getCountAtOrBelow(5));
> {code}
> It fails as below:
> java.lang.AssertionError:
> Expected :6
> Actual :100
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