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From "Thomas Hille (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-10327) Open files in WEBHDFS which are stored in folders by Spark/Mapreduce
Date Tue, 26 Apr 2016 17:16:13 GMT

    [ https://issues.apache.org/jira/browse/HDFS-10327?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15258488#comment-15258488
] 

Thomas Hille commented on HDFS-10327:
-------------------------------------

Hi guys,
It looks like splitting the file in parts is a mapreduce feature rather than spak specific
(https://hadoop.apache.org/docs/r1.2.1/mapred_tutorial.html -- look at the output of $bin/hadoop
dfs -cat /usr/joe/wordcount/output/part-00000).
So its maybe still something for you guys?

> Open files in WEBHDFS which are stored in folders by Spark/Mapreduce
> --------------------------------------------------------------------
>
>                 Key: HDFS-10327
>                 URL: https://issues.apache.org/jira/browse/HDFS-10327
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: webhdfs
>            Reporter: Thomas Hille
>              Labels: features
>
> When Spark saves a file in HDFS it creates a directory which includes many parts of the
file. When you read it with spark programmatically, you can read this directory as it is a
normal file.
> If you try to read this directory-style file in webhdfs, it returns 
> {"exception":"FileNotFoundException","javaClassName":"java.io.FileNotFoundException","message":"Path
is not a file: [...]



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