title: Is hadoop's job ThreadSafe?
body: <p>Anyone knows if <code>org.apache.hadoop.mapreduce.Job</code> is thread-safe? In my application I create a thread for each job, and then <code>waitForCompletion</code>. And I have another monitor thread that checks every job's state with <code>isComplete</code>.</p>
  
  <p>Is that safe? Are jobs thread-safe? Documentation doesn't seem to mention anything about it...</p>
  
  <p>Thanks
  Udi</p>