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https://issues.apache.org/jira/browse/HDFS-16982?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17713213#comment-17713213
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ASF GitHub Bot commented on HDFS-16982:
---------------------------------------

rdingankar commented on code in PR #5556:
URL: https://github.com/apache/hadoop/pull/5556#discussion_r1169036218


##########
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/metrics2/lib/TestMutableMetrics.java:
##########
@@ -52,6 +52,8 @@ public class TestMutableMetrics {
   private static final Logger LOG =
       LoggerFactory.getLogger(TestMutableMetrics.class);
   private static final double EPSILON = 1e-42;
+  private static final int SLEEP_TIME = 6000;

Review Comment:
   updated





> Use the right Quantiles Array for Inverse Quantiles snapshot 
> -------------------------------------------------------------
>
>                 Key: HDFS-16982
>                 URL: https://issues.apache.org/jira/browse/HDFS-16982
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: datanode, metrics
>            Reporter: Ravindra Dingankar
>            Priority: Minor
>              Labels: pull-request-available
>             Fix For: 3.3.0, 3.4.0
>
>
> HDFS-16949 introduced InverseQuantiles. However during snapshot for Inverse 
> Quantiles we were still trying to access values from previous snapshot based 
> on the Quantile Array declared in MutableQuantiles. ( Quantile(.50, .050), 
> Quantile(.75, .025), Quantile(.90, .010), Quantile(.95, .005), Quantile(.99, 
> .001) )
> For InverseQuantiles we wont have these values ( except for Quantile(.50, 
> .050) ) thus except for 50 Percentile snapshot wont return any value for the 
> remaining quantiles.
> Fix is to use the correct Quantiles Array to retrieve values during snapshot. 
> The new UTs verify this behavior.



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