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https://issues.apache.org/jira/browse/HDFS-6193?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13988058#comment-13988058
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Gera Shegalov commented on HDFS-6193:
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Hi [~ozawa], yeah Hftp was recently kicked out with HDFS-5570
> HftpFileSystem open should throw FileNotFoundException for non-existing paths
> -----------------------------------------------------------------------------
>
> Key: HDFS-6193
> URL: https://issues.apache.org/jira/browse/HDFS-6193
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 2.4.0
> Reporter: Gera Shegalov
> Assignee: Gera Shegalov
> Priority: Blocker
> Attachments: HDFS-6193-branch-2.4.0.v01.patch
>
>
> WebHdfsFileSystem.open and HftpFileSystem.open incorrectly handles
> non-existing paths.
> - 'open', does not really open anything, i.e., it does not contact the
> server, and therefore cannot discover FileNotFound, it's deferred until next
> read. It's counterintuitive and not how local FS or HDFS work. In POSIX you
> get ENOENT on open.
> [LzoInputFormat.getSplits|https://github.com/kevinweil/elephant-bird/blob/master/core/src/main/java/com/twitter/elephantbird/mapreduce/input/LzoInputFormat.java]
> is an example of the code that's broken because of this.
> - On the server side, FileDataServlet incorrectly sends SC_BAD_REQUEST
> instead of SC_NOT_FOUND for non-exitsing paths
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