title: Hadoop - Failure Recovery For Reduce Only
body: <p>I have a Hadoop job running which has finished the map part for for 4 days, and now it seems to get suspended at the stage of reduce (reducer is done for 30%)</p>
  <p>I really hope to have a way to only re-process the reduce part if at all possible without having to re-process the long-run map part, Any suggestions?
  Something probably gets it worse that I only have one reducer.</p>