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https://issues.apache.org/jira/browse/HADOOP-8602?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13948476#comment-13948476
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Michael Howard commented on HADOOP-8602:
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Q: Is it actually the case that many/most hadoop configuration options are
case-insensitive?
> Passive mode support for FTPFileSystem
> --------------------------------------
>
> Key: HADOOP-8602
> URL: https://issues.apache.org/jira/browse/HADOOP-8602
> Project: Hadoop Common
> Issue Type: Improvement
> Components: fs
> Affects Versions: 1.0.3, 2.0.0-alpha
> Reporter: Nemon Lou
> Priority: Minor
> Attachments: HADOOP-8602.patch, HADOOP-8602.patch, HADOOP-8602.patch
>
>
> FTPFileSystem uses active mode for default data connection mode.We shall be
> able to choose passive mode when active mode doesn't work (firewall for
> example).
> My thoughts is to add an option "fs.ftp.data.connection.mode" in
> core-site.xml.Since FTPClient(in org.apache.commons.net.ftp package) already
> supports passive mode, we just need to add a few code in FTPFileSystem
> .connect() method.
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