So I wrote my first org.apache.hadoop.madpreduce.Job (not ...mapred.Job). 
Oddly enough, when the reducer is invoked, the "Iterable values" parameter 
actually iterates over just one value, not all the corresponding values 
that were output by my map tasks.  I know this from adding calls to 
System.out.println to my map and reduce code.  I also know that my 
combiner was not invoked (also from println debugging).  So now I am 
trying to determine why things are not being wired up correctly.  What is 
the right way to debug situations like this?

Thanks,
Mike Spreitzer
SMTP: mspre...@us.ibm.com, Lotus Notes: Mike Spreitzer/Watson/IBM
Office phone: +1-914-784-6424 (IBM T/L 863-)
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