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Posted to common-issues@hadoop.apache.org by "Rajesh Balamohan (JIRA)" <ji...@apache.org> on 2016/05/17 06:15:13 UTC

[jira] [Created] (HADOOP-13164) Optimize S3AFileSystem::deleteUnnecessaryFakeDirectories

Rajesh Balamohan created HADOOP-13164:
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             Summary: Optimize S3AFileSystem::deleteUnnecessaryFakeDirectories
                 Key: HADOOP-13164
                 URL: https://issues.apache.org/jira/browse/HADOOP-13164
             Project: Hadoop Common
          Issue Type: Bug
          Components: fs/s3
            Reporter: Rajesh Balamohan


https://github.com/apache/hadoop/blob/27c4e90efce04e1b1302f668b5eb22412e00d033/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/S3AFileSystem.java#L1224

deleteUnnecessaryFakeDirectories is invoked in S3AFileSystem during rename and on outputstream close() to purge any fake directories. Depending on the nesting in the folder structure, it might take a lot longer time as it invokes getFileStatus multiple times.  Instead, it should be able to break out of the loop once a non-empty directory is encountered. 





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