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https://issues.apache.org/jira/browse/HDFS-16982?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17713189#comment-17713189
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ASF GitHub Bot commented on HDFS-16982:
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rdingankar commented on PR #5556:
URL: https://github.com/apache/hadoop/pull/5556#issuecomment-1511698162
@goiri fixed the checkstyle warnings. Can you please take a look at the PR
and help merge if it looks good. Thanks!
> 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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