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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-9377) FTPFileSystem.listStatus() runs very slow, due to inappropriate call of filePath.makeQualified
Date Thu, 07 Mar 2013 09:26:15 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-9377?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13595713#comment-13595713
] 

Steve Loughran commented on HADOOP-9377:
----------------------------------------

Do we have any tests for this FS yet?
                
> FTPFileSystem.listStatus() runs very slow, due to inappropriate call of filePath.makeQualified
> ----------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-9377
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9377
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: fs
>    Affects Versions: 2.0.3-alpha
>            Reporter: James Yu
>         Attachments: HADOOP-9377.diff
>
>
> FTPFileSystem.listStatus() calls
> getFileStatus(ftpFiles[i], absolute) calls
> new FileStatus(....) calls 
> filePath.makeQualified(...) calls
> fs.getWorkingDirectory() calls
> getHomeDirectory()
> which creates new FTP connection every time, to get the workdingDirectory. this caused
the FTPFileSystem.listStatus() takes long time to run (on average 3-6 seconds per file in
my test).
> I attach a suggestion of fix in FTPFileSystem.java, only 4 lines of change. after the
fix, there's no slowness issue anymore.

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