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Posted to common-dev@hadoop.apache.org by "Sean Mackrory (JIRA)" <ji...@apache.org> on 2017/03/10 23:59:04 UTC

[jira] [Created] (HADOOP-14172) S3Guard: import does not import empty directory

Sean Mackrory created HADOOP-14172:
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             Summary: S3Guard: import does not import empty directory
                 Key: HADOOP-14172
                 URL: https://issues.apache.org/jira/browse/HADOOP-14172
             Project: Hadoop Common
          Issue Type: Sub-task
            Reporter: Sean Mackrory


It imports everything comes up from listFiles, which includes only files (and their parent directories as a side-effect). My first thought on doing this would be to override S3AFileSystem to add an optional parameter to use AcceptAllButSelfAndS3nDirs instead of AcceptFilesOnly. But we could also manually traverse the tree to get all FileStatus objects directory by directory like we do for diff. That's far slower but doesn't add surface area to S3AFileSystem. But there's also the impact to other S3 clients to worry about - I could go either way on that.



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