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From Vipul Pandey <vipan...@gmail.com>
Subject -libjars?
Date Fri, 10 Dec 2010 06:29:36 GMT
disclaimer : a newbie!!!

Howdy?

Got a quick question. -libjars option doesn't seem to work for me in - prettymuch - my first
(or mayby second) mapreduce job. 
Here's what i'm doing :
$bin/hadoop jar  sherlock.jar somepkg.FindSchoolsJob -libjars  HStats-1A18.jar input output

sherlock.jar has my main class (ofcourse)  FindSchoolsJob, which runs just fine by itself
till I add a dependency on a class in HStats-1A18.jar.
When I run the above command with -libjars specified - it fails to find my classes that 'are'
inside HStats jar file.

Exception in thread "main" java.lang.NoClassDefFoundError: com/*****/HAgent
	at com.*****.FindSchoolsJob.run(FindSchoolsJob.java:46)
	at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
	at com.******.FindSchoolsJob.main(FindSchoolsJob.java:101)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.apache.hadoop.util.RunJar.main(RunJar.java:156)
Caused by: java.lang.ClassNotFoundException:com/*****/HAgent
	at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
	... 8 more


My main class is defined as below : 
public class FindSchoolsJob extends Configured implements Tool {
:
	public int run(String[] args) throws Exception {
:
:
              }
:
	public static void main(String[] args) throws Exception {
		int res = ToolRunner.run(new Configuration(), new FindSchoolsJob(),
				args);
		System.exit(res);
	}
}

Any hint would be highly appreciated.

Thank You!
~V
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