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https://issues.apache.org/jira/browse/HADOOP-12348?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15008324#comment-15008324
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Brahma Reddy Battula commented on HADOOP-12348:
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[~ajisakaa] since it is merged to branch-2.7 then HDFS-9067 and HDFS-9073 also
need to merge.
> MetricsSystemImpl creates MetricsSourceAdapter with wrong time unit parameter.
> ------------------------------------------------------------------------------
>
> Key: HADOOP-12348
> URL: https://issues.apache.org/jira/browse/HADOOP-12348
> Project: Hadoop Common
> Issue Type: Bug
> Components: metrics
> Reporter: zhihai xu
> Assignee: zhihai xu
> Fix For: 2.8.0, 2.7.3
>
> Attachments: HADOOP-12348.000.patch, HADOOP-12348.001.patch,
> HADOOP-12348.branch-2.patch
>
>
> MetricsSystemImpl creates MetricsSourceAdapter with wrong time unit
> parameter. MetricsSourceAdapter expects time unit millisecond for
> jmxCacheTTL but MetricsSystemImpl passes time unit second to
> MetricsSourceAdapter constructor.
> {code}
> jmxCacheTS = Time.now() + jmxCacheTTL;
> /**
> * Current system time. Do not use this to calculate a duration or interval
> * to sleep, because it will be broken by settimeofday. Instead, use
> * monotonicNow.
> * @return current time in msec.
> */
> public static long now() {
> return System.currentTimeMillis();
> }
> {code}
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