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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-6143) WebHdfsFileSystem open should throw FileNotFoundException for non-existing paths
Date Tue, 08 Apr 2014 13:34:32 GMT

    [ https://issues.apache.org/jira/browse/HDFS-6143?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13962963#comment-13962963
] 

Hudson commented on HDFS-6143:
------------------------------

FAILURE: Integrated in Hadoop-Mapreduce-trunk #1751 (See [https://builds.apache.org/job/Hadoop-Mapreduce-trunk/1751/])
HDFS-6143. WebHdfsFileSystem open should throw FileNotFoundException for non-existing paths.
Contributed by Gera Shegalov. (wheat9: http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1585639)
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/web/ByteRangeInputStream.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/web/WebHdfsFileSystem.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/web/TestWebHdfsFileSystemContract.java


> WebHdfsFileSystem open should throw FileNotFoundException for non-existing paths
> --------------------------------------------------------------------------------
>
>                 Key: HDFS-6143
>                 URL: https://issues.apache.org/jira/browse/HDFS-6143
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 2.3.0
>            Reporter: Gera Shegalov
>            Assignee: Gera Shegalov
>            Priority: Blocker
>             Fix For: 2.5.0
>
>         Attachments: HDFS-6143-branch-2.4.0.v01.patch, HDFS-6143-trunk-after-HDFS-5570.v01.patch,
HDFS-6143-trunk-after-HDFS-5570.v02.patch, HDFS-6143.v01.patch, HDFS-6143.v02.patch, HDFS-6143.v03.patch,
HDFS-6143.v04.patch, HDFS-6143.v04.patch, HDFS-6143.v05.patch, HDFS-6143.v06.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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