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https://issues.apache.org/jira/browse/HADOOP-14166?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16023361#comment-16023361
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Hudson commented on HADOOP-14166:
---------------------------------
SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #11773 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/11773/])
HADOOP-14166. Reset the DecayRpcScheduler AvgResponseTime metric to zero
(brahma: rev dcf4559ebdb5bb11d03b264a9875bff316b89eef)
* (edit)
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/DecayRpcScheduler.java
> Reset the DecayRpcScheduler AvgResponseTime metric to zero when queue is not
> used
> ---------------------------------------------------------------------------------
>
> Key: HADOOP-14166
> URL: https://issues.apache.org/jira/browse/HADOOP-14166
> Project: Hadoop Common
> Issue Type: Bug
> Components: common
> Reporter: Surendra Singh Lilhore
> Assignee: Surendra Singh Lilhore
> Fix For: 2.9.0, 3.0.0-alpha3, 2.8.2
>
> Attachments: HADOOP-14166.001.patch
>
>
> {noformat}
> "name" : "Hadoop:service=NameNode,name=DecayRpcSchedulerMetrics2.ipc.8020",
> "modelerType" : "DecayRpcSchedulerMetrics2.ipc.8020",
> "tag.Context" : "ipc.8020",
> "tag.Hostname" : "host1",
> "DecayedCallVolume" : 3,
> "UniqueCallers" : 1,
> "Caller(root).Volume" : 266,
> "Caller(root).Priority" : 3,
> "Priority.0.AvgResponseTime" : 6.151201023385511E-5,
> "Priority.1.AvgResponseTime" : 0.0,
> "Priority.2.AvgResponseTime" : 0.0,
> "Priority.3.AvgResponseTime" : 1.184686336544601,
> "Priority.0.CompletedCallVolume" : 0,
> "Priority.1.CompletedCallVolume" : 0,
> "Priority.2.CompletedCallVolume" : 0,
> "Priority.3.CompletedCallVolume" : 2,
> "CallVolume" : 266
> {noformat}
> "Priority.0.AvgResponseTime" is always "6.151201023385511E-5" even the queue
> is not used for long time.
> {code}
> if (lastAvg > PRECISION || averageResponseTime > PRECISION) {
> if (enableDecay) {
> final double decayed = decayFactor * lastAvg + averageResponseTime;
> LOG.info("Decayed " + i + " time " + decayed);
> responseTimeAvgInLastWindow.set(i, decayed);
> } else {
> responseTimeAvgInLastWindow.set(i, averageResponseTime);
> }
> }
> {code}
> we should reset it to zero when above condition is false.
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