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From Alessandro Binhara <binh...@gmail.com>
Subject Re: Problem write on HDFS
Date Mon, 24 Jan 2011 15:01:48 GMT
..i try
 java -classpath hadoop-core-0.20.1.jar -jar HahoopHdfsHello.jar

i got a same error..
i will try build a servlet and run on tomcat...
i try many issues to config a classpath... all fail..

thanks


On Mon, Jan 24, 2011 at 12:54 PM, Harsh J <qwertymaniac@gmail.com> wrote:

> The issue would definitely lie with your CLASSPATH.
>
> Ideally, while beginning development using Hadoop 0.20, it is better
> to use the `hadoop jar` command to launch jars of any kind that
> require Hadoop libraries; be it MapReduce or not. The command will
> ensure that all the classpath requirements for Hadoop-side libraries
> are satisfied, so you don't have to worry.
>
> Anyhow, try launching it this way:
> $ java -classpath hadoop-0.20.2-core.jar -jar HadoopHdfsHello.jar; #
> This should run just fine.
>
> On Mon, Jan 24, 2011 at 5:06 PM, Alessandro Binhara <binhara@gmail.com>
> wrote:
> > Hello ..
> >
> > i solve problem in jar..
> > i put a hadoop-core-0.20.2.jar   in same jar dir.
> >
> > i configure a class path
> > export CLASSPATH=.:$JAVA_HOME
> >
> > i got this erro in shell
> >
> > root:~# java -jar HahoopHdfsHello.jar
> > Exception in thread "main" java.lang.NoClassDefFoundError:
> > org/apache/hadoop/conf/Configuration
> >        at HadooHdfsHello.main(HadooHdfsHello.java:18)
> > Caused by: java.lang.ClassNotFoundException:
> > org.apache.hadoop.conf.Configuration
> >        at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
> >        at java.security.AccessController.doPrivileged(Native Method)
> >        at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
> >        at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
> >        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
> >        at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
> >        ... 1 more
> >
> >
> > What is the problem?
> >
> > thanks
> >
>
>
>
> --
> Harsh J
> www.harshj.com
>

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