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https://issues.apache.org/jira/browse/HADOOP-9377?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13595595#comment-13595595
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Suresh Srinivas commented on HADOOP-9377:
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James, just posting the diff as attachment is sufficient. Also when you wan to
post code snippets, you could surround it with \{code\}\{code\} to format it as
code. See for details -
https://issues.apache.org/jira/secure/WikiRendererHelpAction.jspa?section=texteffects
(or click the question mark below the comment box)
> 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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