If you are talking about the 'Setup task' that is used to initialize or setup the job, yes, it can run on either the map slot or reduce slot depending on what is available.
Thanks Hemanth On Thu, Oct 14, 2010 at 1:54 AM, He Chen <airb...@gmail.com> wrote: > Hi, all > > I found out that if the there is no map slot, Hadoop will use reduce slot to > setup mapreduce job when I submit a series of jobs. > > The first two jobs setuped themselves with a MapAttempt. However, they > occupy all the map slots. When the third job comes, I find out it uses the > ReduceAttempt to du the setup. After that, no more setup logged in the job > history. > > Am I correct? > > > Chen >
