Jinghui Wang created HDFS-7282:
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             Summary: TestShortCircuitCache and TestBlockReaderFactory have 
failures caused by TemporarySocketDirectory getting garbage collected before 
Datanode starts up accessing the dir causing FileNotFoundException.
                 Key: HDFS-7282
                 URL: https://issues.apache.org/jira/browse/HDFS-7282
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: test
    Affects Versions: 2.4.1
            Reporter: Jinghui Wang
            Assignee: Jinghui Wang


TemporarySocketDirectory has finalize method deletes the directory, in 
TestShortCircuitCache and TestBlockReaderFactory, the TemporarySocketDirectory 
created are not refereced later in the tests, which can get garbage collected 
(deleted the dir) before Datanode start up accessing the directory under 
TemporarySocketDirectory causing FileNotFoundException.



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