Colin Patrick McCabe created HDFS-4433:
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             Summary: make TestPeerCache not flaky
                 Key: HDFS-4433
                 URL: https://issues.apache.org/jira/browse/HDFS-4433
             Project: Hadoop HDFS
          Issue Type: Sub-task
            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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