This looks like a case of data corruption (of one/more intermediate files, a.k.a. IFiles).
On Fri, Jan 28, 2011 at 11:21 PM, Pedro Costa <psdc1...@gmail.com> wrote: > Hi, > > I'm running the Terasort problem in cluster mode, and I've got a > RunTimeException in a Reduce Task. > > java.lang.RuntimeException: problem advancing post rec#499959 > > (Please, see attachment) > > What this error means? Is it a problem about wrong KEYOUT and VALUEOUT > in the Reduce Task? > > Thanks, > > -- > Pedro > -- Harsh J www.harshj.com