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Posted to common-issues@hadoop.apache.org by "Allen Wittenauer (JIRA)" <ji...@apache.org> on 2015/05/06 05:26:26 UTC

[jira] [Updated] (HADOOP-9377) FTPFileSystem.listStatus() runs very slow, due to inappropriate call of filePath.makeQualified

     [ https://issues.apache.org/jira/browse/HADOOP-9377?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Allen Wittenauer updated HADOOP-9377:
-------------------------------------
    Labels: BB2015-05-TBR  (was: )

> 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
>              Labels: BB2015-05-TBR
>         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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