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https://issues.apache.org/jira/browse/HADOOP-13713?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15568876#comment-15568876
 ] 

Steve Loughran commented on HADOOP-13713:
-----------------------------------------

Initial failure at end of a parallel test run

{code}
Failed tests: 
  
ITestS3AContractRootDir>AbstractContractRootDirectoryTest.testRmEmptyRootDirNonRecursive:97->Assert.fail:88
 Deletion of child entries failed, still have2
  s3a://stevel-ireland/fork-7
  s3a://stevel-ireland/fork-8
{code}

immediate rerun of test only, with the parallell test profile still enabled
{code}
mvn -T 1C integration-test  -Dtest=moo -Dparallel-tests -DtestsThreadCount=8 
-Dit.test=ITestS3AContractRootDir
{code}

outcome
{code}
  
testRmEmptyRootDirNonRecursive(org.apache.hadoop.fs.contract.s3a.ITestS3AContractRootDir)
  Time elapsed: 0.863 sec  <<< FAILURE!
  java.lang.AssertionError: Deletion of child entries failed, still have1
    s3a://stevel-ireland/fork-1

        at org.junit.Assert.fail(Assert.java:88)
        at 
org.apache.hadoop.fs.contract.AbstractContractRootDirectoryTest.testRmEmptyRootDirNonRecursive(AbstractContractRootDirectoryTest.java:97)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
        at 
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
        at 
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
        at 
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
        at 
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
        at 
org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
        at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
        at 
org.junit.internal.runners.statements.FailOnTimeout$StatementThread.run(FailOnTimeout.java:74)

{code}

Next rerun: all well

> ITestS3AContractRootDir.testRmEmptyRootDirNonRecursive failing intermittently
> -----------------------------------------------------------------------------
>
>                 Key: HADOOP-13713
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13713
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3
>    Affects Versions: 2.8.0
>         Environment: s3 ireland
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>
> intermittent failure of 
> {{ITestS3AContractRootDir.testRmEmptyRootDirNonRecursive}} surfacing in 
> HADOOP-12774 test run.
> This is a test which came in with HADOOP-12977, one test which deletes all 
> children of the root dir, then verifies that they are gone. Although it 
> tested happily during development, the sightings of two transient failures 
> before it worked implied that it's either got some race condition with 
> previous tests and/or maven build, or we are seeing listing inconsistency.



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