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https://issues.apache.org/jira/browse/HDFS-4433?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Todd Lipcon resolved HDFS-4433.
-------------------------------

      Resolution: Fixed
    Hadoop Flags: Reviewed
    
> make TestPeerCache not flaky
> ----------------------------
>
>                 Key: HDFS-4433
>                 URL: https://issues.apache.org/jira/browse/HDFS-4433
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: datanode, hdfs-client, performance
>            Reporter: Colin Patrick McCabe
>            Assignee: Colin Patrick McCabe
>            Priority: Minor
>         Attachments: HDFS-4433.001.patch
>
>
> TestPeerCache is flaky now because it relies on using the same global cache 
> for every test function.  So the cache timeout can't be set to something 
> different for each test.
> Also, we should implement equals and hashCode for {{FakePeer}}, since 
> otherwise {{testMultiplePeersWithSameDnId}} is not really testing what 
> happens when multiple equal peers are inserted into the cache.  (The default 
> equals is object equality).

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