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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-13164) Optimize S3AFileSystem::deleteUnnecessaryFakeDirectories
Date Tue, 13 Sep 2016 11:29:21 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-13164?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15486976#comment-15486976
] 

Hadoop QA commented on HADOOP-13164:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  0m  0s{color} | {color:blue}
Docker mode activated. {color} |
| {color:red}-1{color} | {color:red} patch {color} | {color:red}  0m  6s{color} | {color:red}
HADOOP-13164 does not apply to trunk. Rebase required? Wrong Branch? See https://wiki.apache.org/hadoop/HowToContribute
for help. {color} |
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|| Subsystem || Report/Notes ||
| JIRA Issue | HADOOP-13164 |
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12828204/HADOOP-13164.branch-2-002.patch
|
| Console output | https://builds.apache.org/job/PreCommit-HADOOP-Build/10493/console |
| Powered by | Apache Yetus 0.4.0-SNAPSHOT   http://yetus.apache.org |


This message was automatically generated.



> Optimize S3AFileSystem::deleteUnnecessaryFakeDirectories
> --------------------------------------------------------
>
>                 Key: HADOOP-13164
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13164
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: fs/s3
>    Affects Versions: 2.8.0
>            Reporter: Rajesh Balamohan
>            Priority: Minor
>         Attachments: HADOOP-13164.branch-2-002.patch, HADOOP-13164.branch-2.WIP.002.patch,
HADOOP-13164.branch-2.WIP.patch
>
>
> 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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