[
https://issues.apache.org/jira/browse/HDFS-6236?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13967284#comment-13967284
]
Haohui Mai commented on HDFS-6236:
----------------------------------
+1 pending jenkins.
> ImageServlet should use Time#monotonicNow to measure latency.
> -------------------------------------------------------------
>
> Key: HDFS-6236
> URL: https://issues.apache.org/jira/browse/HDFS-6236
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Affects Versions: 3.0.0, 2.4.0
> Reporter: Chris Nauroth
> Assignee: Chris Nauroth
> Priority: Minor
> Attachments: HDFS-6236.1.patch
>
>
> {{ImageServlet}} currently uses {{Time#now}} to get file transfer latency
> measurements and pass them to the metrics system. It would be preferrable to
> use {{Time#monotonicNow}} so that we're using the most precise available
> system timer, and we're not subject to odd bugs that could result in negative
> latency measurements, like resetting the system clock.
--
This message was sent by Atlassian JIRA
(v6.2#6252)
