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https://issues.apache.org/jira/browse/HADOOP-13221?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15555342#comment-15555342
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Steve Loughran commented on HADOOP-13221:
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Moved to S3a Phase III, marking as a dependent of HADOOP-13695. We could make
this another scheduled future of a block write
> s3a create() doesn't check for a parent path being a file
> ---------------------------------------------------------
>
> Key: HADOOP-13221
> URL: https://issues.apache.org/jira/browse/HADOOP-13221
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Affects Versions: 2.7.2
> Reporter: Steve Loughran
> Assignee: Rajesh Balamohan
>
> Seen in a code review. Notable that if true, this got by all the FS contract
> tests —showing we missed a couple.
> {{S3AFilesystem.create()}} does not examine its parent paths to verify that
> there does not exist one which is a file. It looks for the destination path
> if overwrite=false (see HADOOP-13188 for issues there), but it doesn't check
> the parent for not being a file, or the parent of that path.
> It must go up the tree, verifying that either a path does not exist, or that
> the path is a directory. The scan can stop at the first entry which is is a
> directory, thus the operation is O(empty-directories) and not O(directories).
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