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https://issues.apache.org/jira/browse/HADOOP-14444?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16823015#comment-16823015
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Hadoop QA commented on HADOOP-14444:
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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  7s{color} 
| {color:red} HADOOP-14444 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-14444 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12923160/HADOOP-14444.15.patch 
|
| Console output | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/16176/console |
| Powered by | Apache Yetus 0.8.0   http://yetus.apache.org |


This message was automatically generated.



> New implementation of ftp and sftp filesystems
> ----------------------------------------------
>
>                 Key: HADOOP-14444
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14444
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: fs
>    Affects Versions: 2.8.0
>            Reporter: Lukas Waldmann
>            Assignee: Lukas Waldmann
>            Priority: Major
>         Attachments: HADOOP-14444.10.patch, HADOOP-14444.11.patch, 
> HADOOP-14444.12.patch, HADOOP-14444.13.patch, HADOOP-14444.14.patch, 
> HADOOP-14444.15.patch, HADOOP-14444.2.patch, HADOOP-14444.3.patch, 
> HADOOP-14444.4.patch, HADOOP-14444.5.patch, HADOOP-14444.6.patch, 
> HADOOP-14444.7.patch, HADOOP-14444.8.patch, HADOOP-14444.9.patch, 
> HADOOP-14444.patch
>
>
> Current implementation of FTP and SFTP filesystems have severe limitations 
> and performance issues when dealing with high number of files. Mine patch 
> solve those issues and integrate both filesystems such a way that most of the 
> core functionality is common for both and therefore simplifying the 
> maintainability.
> The core features:
>  * Support for HTTP/SOCKS proxies
>  * Support for passive FTP
>  * Support for explicit FTPS (SSL/TLS)
>  * Support of connection pooling - new connection is not created for every 
> single command but reused from the pool.
>  For huge number of files it shows order of magnitude performance improvement 
> over not pooled connections.
>  * Caching of directory trees. For ftp you always need to list whole 
> directory whenever you ask information about particular file.
>  Again for huge number of files it shows order of magnitude performance 
> improvement over not cached connections.
>  * Support of keep alive (NOOP) messages to avoid connection drops
>  * Support for Unix style or regexp wildcard glob - useful for listing a 
> particular files across whole directory tree
>  * Support for reestablishing broken ftp data transfers - can happen 
> surprisingly often
>  * Support for sftp private keys (including pass phrase)
>  * Support for keeping passwords, private keys and pass phrase in the jceks 
> key stores



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