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https://issues.apache.org/jira/browse/HADOOP-12667?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15286456#comment-15286456
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Steve Loughran commented on HADOOP-12667:
-----------------------------------------
Looking at patch
# All the check that is needed is a {{getFileStatus()}} + check there is a
parent dir. But as create() does that anyway, it could be optimised by having
the internal create do/not do this
# looking at S3A, I'm not sure that parent dirs are created right now. I guess
it relies on the fact that by creating a long blob path, the parent dir comes
in implicitly. But what if there is a parent and it is a file? Maybe we need a
test case in {{AbstractContractCreateTest}} to make sure that it's an error to
attempt to do that.
# this implementation of {{createNonRecursive()}} will need that.
# I don't see any tests for {{createNonRecursive()}} in the filesystem
contract tests, or indeed, anything in
{{hadoop-common-project/hadoop-common/src/site/markdown/filesystem/filesystem.md}}
to define the semantics of the operation. I'm afraid that'll be needed. The
test you've written will be a foundation for that, though it'll need more tests
(parent is file, parent is root dir, overwrite = true, overwrite = false)
> s3a: Support createNonRecursive API
> -----------------------------------
>
> Key: HADOOP-12667
> URL: https://issues.apache.org/jira/browse/HADOOP-12667
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs/s3
> Reporter: Sean Mackrory
> Assignee: Sean Mackrory
> Attachments: HADOOP-12667.001.patch
>
>
> HBase and other clients rely on the createNonRecursive API, which was
> recently un-deprecated. S3A currently does not support it.
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