[ https://issues.apache.org/jira/browse/HDFS-3650?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13415832#comment-13415832
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Hadoop QA commented on HDFS-3650:
---------------------------------
-1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12536721/hdfs-3650-1.patch
against trunk revision .
+1 @author. The patch does not contain any @author tags.
+1 tests included. The patch appears to include 3 new or modified test files.
+1 javac. The applied patch does not increase the total number of javac compiler warnings.
+1 javadoc. The javadoc tool did not generate any warning messages.
+1 eclipse:eclipse. The patch built with eclipse:eclipse.
+1 findbugs. The patch does not introduce any new Findbugs (version 1.3.9) warnings.
+1 release audit. The applied patch does not increase the total number of release audit
warnings.
-1 core tests. The patch failed these unit tests in hadoop-common-project/hadoop-common
hadoop-hdfs-project/hadoop-hdfs:
org.apache.hadoop.ha.TestZKFailoverController
org.apache.hadoop.metrics2.impl.TestMetricsSystemImpl
org.apache.hadoop.io.file.tfile.TestTFileByteArrays
org.apache.hadoop.io.file.tfile.TestTFileJClassComparatorByteArrays
org.apache.hadoop.hdfs.server.namenode.metrics.TestNameNodeMetrics
org.apache.hadoop.hdfs.TestReplication
org.apache.hadoop.hdfs.TestPersistBlocks
+1 contrib tests. The patch passed contrib unit tests.
Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/2836//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/2836//console
This message is automatically generated.
> Use MutableQuantiles to provide latency histograms for various operations
> -------------------------------------------------------------------------
>
> Key: HDFS-3650
> URL: https://issues.apache.org/jira/browse/HDFS-3650
> Project: Hadoop HDFS
> Issue Type: Improvement
> Affects Versions: 2.0.0-alpha
> Reporter: Andrew Wang
> Assignee: Andrew Wang
> Attachments: hdfs-3650-1.patch
>
>
> MutableQuantiles provide accurate estimation of various percentiles for a stream of data.
Many existing metrics reported by a MutableRate would also benefit from having these percentiles;
lets add MutableQuantiles where we think it'd be useful.
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