TestRecoveryManager fails wtih FileAlreadyExistsException
---------------------------------------------------------

                 Key: HADOOP-5484
                 URL: https://issues.apache.org/jira/browse/HADOOP-5484
             Project: Hadoop Core
          Issue Type: Bug
          Components: test
    Affects Versions: 0.21.0
            Reporter: Hairong Kuang
             Fix For: 0.21.0


TestRecoveryManager always fails when I run core tests in a linux redhat 
machine. It does not fail on a Mac machine.

Testcase: testRecoveryManager took 55.842 sec
        Caused an ERROR
Output directory file:XX/build/test/data/test-recovery-manager/output1 already 
exists
org.apache.hadoop.mapred.FileAlreadyExistsException: Output directory 
file:XX/build/test/data/test-recovery-manager/output1 already exists
        at 
org.apache.hadoop.mapred.FileOutputFormat.checkOutputSpecs(FileOutputFormat.java:111)
        at 
org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:772)
        at org.apache.hadoop.mapred.JobClient.submitJob(JobClient.java:730)
        at 
org.apache.hadoop.mapred.TestRecoveryManager.testRecoveryManager(TestRecoveryManager.java:196)


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