"increment" and "decrement" are not idempotent. Map/Reduce requires you do things in an idempotent fashion (the same task may get executed multiple times, even simultaneously).
On Tue, Jan 11, 2011 at 4:07 PM, Billy Pearson <[email protected]>wrote: > Is there a way to make a mapreduce job and use incrementColumnValue in > place of Put? > > I am trying to move a job over from thrift and have to be able to use > incrementColumnValue > as a output but I can not seams to work it out with out calling HTable > every map. > > small example would be nice if anyone uses it now > Billy > > >
