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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-12977) s3a ignores delete("/", true)
Date Wed, 27 Jul 2016 13:05:20 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-12977?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15395633#comment-15395633
] 

Steve Loughran commented on HADOOP-12977:
-----------------------------------------

S3a 
{code}

testRmEmptyRootDirNonRecursive(org.apache.hadoop.fs.contract.s3a.TestS3AContractRootDir) 
Time elapsed: 0.42 sec  <<< ERROR!
org.apache.hadoop.fs.PathIsNotEmptyDirectoryException: `Path is a folder: s3a://steve-something/
and it is not an empty directory': Directory is not empty
	at org.apache.hadoop.fs.s3a.S3AFileSystem.innerDelete(S3AFileSystem.java:1126)
	at org.apache.hadoop.fs.s3a.S3AFileSystem.delete(S3AFileSystem.java:1094)
	at org.apache.hadoop.fs.contract.AbstractContractRootDirectoryTest.testRmEmptyRootDirNonRecursive(AbstractContractRootDirectoryTest.java:80)
	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}

> s3a ignores delete("/", true)
> -----------------------------
>
>                 Key: HADOOP-12977
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12977
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3
>    Affects Versions: 2.9.0
>            Reporter: Steve Loughran
>            Priority: Minor
>         Attachments: HADOOP-12977-001.patch
>
>
> if you try to delete the root directory on s3a, you get politely but firmly told you
can't
> {code}
> 2016-03-30 12:01:44,924 INFO  s3a.S3AFileSystem (S3AFileSystem.java:delete(638)) - s3a
cannot delete the root directory
> {code}
> The semantics of {{rm -rf "/"}} are defined, they are "delete everything underneath,
while preserving the root dir itself".
> # s3a needs to support this.
> # this skipped through the FS contract tests in {{AbstractContractRootDirectoryTest}};
the option of whether deleting / works or not should be made configurable.



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