title: java.lang.NoClassDefFoundError in Hadoop-1.0.1
body: <p>i am working with Hadoop-1.0.1 in Eclipse. I am trying to run <a href="http://hadoop.apache.org/common/docs/current/mapred_tutorial.html#Example%3a+WordCount+v1.0" rel="nofollow">wordcount</a> application but when i run my WordCount.java, Eclipse shows me following error</p>
  
  <pre><code>Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory
      at org.apache.hadoop.conf.Configuration.&lt;clinit&gt;(Configuration.java:143)
      at test.WordCount.main(WordCount.java:56)
  Caused by: java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory
      at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
      at java.security.AccessController.doPrivileged(Native Method)
      at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
      at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
      ... 2 more
  </code></pre>
  
  <p>I have hadoop-core-1.0.1.jar in my <code>classpath</code>. Should the application require more jar</p>