title: Is Hadoop a good open-source project to join?
body: <p>I've been learning Java for the last 2 months with a Core Java book. Now I want to write something real, but at first I decided that I need to improve my knoweledge about algorithms and data sturctures so I'm currently reading a book on that. </p>
  
  <p>I want to join an open-source project which is mature enough to learn from it but is still growing so I can really contribute to it. I browsed the whole apache and sourceforge looking for something interesting and the project I became really excited about is Apache Hadoop. Although it's quite complicated I don't think it's going to be a problem if I'm interested enough.</p>
  
  <p>So the question is: does anybody here has expereince contributing to Hadoop? What can you say? Is there enough room for futrher development?  </p>