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https://issues.apache.org/jira/browse/HDFS-3002?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13215680#comment-13215680
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Steve Loughran commented on HDFS-3002:
--------------------------------------

HDFS-2966 is independent of this as it is designed to handle the test failing 
on an overloaded system where the replication takes longer than the sleep 
times, so they both need to go in, though -2966 is a hard one to replicate. I 
will gladly let Suresh rebase that patch once this is in.
                
> TestNameNodeMetrics need not wait for metrics update with new metrics 
> framework
> -------------------------------------------------------------------------------
>
>                 Key: HDFS-3002
>                 URL: https://issues.apache.org/jira/browse/HDFS-3002
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: test
>    Affects Versions: 0.23.0, 0.24.0
>            Reporter: Suresh Srinivas
>            Assignee: Suresh Srinivas
>            Priority: Trivial
>         Attachments: HDFS-3002.patch
>
>
> With older metrics framework, the namenode metrics was updated by replication 
> thread. This required test having to wait for replication interval. This is 
> no longer necessary with metrics2 framework. 

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