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From "Segel, Mike" <mse...@navteq.com>
Subject RE: Loading conf file sitting in HDFS
Date Fri, 29 Oct 2010 19:54:52 GMT

I'm sure someone will correct me... 

What I saw was the overloaded method addResource().

Looking at the various methods' input:
addResource(String name) := name - resource to be added, the classpath is examined for a file
with that name.
addResource(URL url) := url - url of the resource to be added, the local filesystem is examined
directly to find the resource, without referring to the classpath.
addResource(Path file) := file - file-path of resource to be added, the local filesystem is
examined directly to find the resource, without referring to the classpath.

And then:

addResource(InputStream in) := in - InputStream to deserialize the object from.

The first 3 specifically are looking for a local file. (Unix file system).

The last one take a generic InputStream which could come from a Unix file or an HDFS file.

It looks like the initial intention of loading configuration information was from Unix and
then HDFS was an afterthought. (My Guess).



-----Original Message-----
From: Shrijeet Paliwal [mailto:shrijeet@rocketfuel.com] 
Sent: Friday, October 29, 2010 2:39 PM
To: general@hadoop.apache.org; mapreduce-user@hadoop.apache.org
Subject: Re: Loading conf file sitting in HDFS

I got it working by doing this (passing inputstream):


Would still be interested in knowing insights if any one wants to share.


On Fri, Oct 29, 2010 at 12:18 PM, Shrijeet Paliwal

> Hello All,
> I am trying to load a conf file located in hdfs.
> I was hoping following would work:
> Path apath = new Path(conf.get("fs.default.name"),
> "/home/shrijeet/blah.xml");
> conf.addResource(apath);
> But I get following exception,
> Exception in thread "main" java.lang.RuntimeException:
> hdfs://localhost:8020/home/shrijeet/blah.xml not found
>         at
> org.apache.hadoop.conf.Configuration.loadResource(Configuration.java:1297)
>         at
> org.apache.hadoop.conf.Configuration.loadResources(Configuration.java:1227)
> File does exist however,
> [12:20][shrijeet@shrijeet-desktop]~$ hadoop dfs -ls
> hdfs://localhost:8020/home/shrijeet/blah.xml
> Found 1 items
> -rw-r--r--   1 shrijeet shrijeet        488 2010-10-29 12:16
> /home/shrijeet/blah.xml
> Thoughts?
> -Shrijeet

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