hadoop-common-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Brahma Reddy Battula (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-14166) Reset the DecayRpcScheduler AvgResponseTime metric to zero when queue is not used
Date Wed, 24 May 2017 17:32:04 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-14166?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Brahma Reddy Battula updated HADOOP-14166:
------------------------------------------
       Resolution: Fixed
     Hadoop Flags: Reviewed
    Fix Version/s: 2.8.2
                   3.0.0-alpha3
                   2.9.0
           Status: Resolved  (was: Patch Available)

Committed to {{trunk}},{{branch-2}} and {{branch-2.8}}. [~surendrasingh] thanks for your contribution.
it's nice finding.. [~xyao] thanks for additional review.

> 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.



--
This message was sent by Atlassian JIRA
(v6.3.15#6346)

---------------------------------------------------------------------
To unsubscribe, e-mail: common-issues-unsubscribe@hadoop.apache.org
For additional commands, e-mail: common-issues-help@hadoop.apache.org


Mime
View raw message