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
