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Posted to common-issues@hadoop.apache.org by "Surendra Singh Lilhore (JIRA)" <ji...@apache.org> on 2017/03/09 05:59:38 UTC
[jira] [Created] (HADOOP-14166) Reset the DecayRpcScheduler
AvgResponseTime metric to zero when queue is not used
Surendra Singh Lilhore created HADOOP-14166:
-----------------------------------------------
Summary: 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
{noformat}
"name" : "Hadoop:service=NameNode,name=DecayRpcSchedulerMetrics2.ipc.65110",
"modelerType" : "DecayRpcSchedulerMetrics2.ipc.65110",
"tag.Context" : "ipc.65110",
"tag.Hostname" : "BLR1000006556",
"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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