Job Chaining not working

Jun 23, 2014 at 1:56 PM
I'm looking at the samples for Lab2. I want to run a first MapReduce and use the output from that process as the input for the second process. However, even though the first process produces the expected results and places them in the expected place, the second process seems to run but doesn't produce any output (zero bytes) although I get no errors.

Funny thing is, that if I run the first job, then run the second job separately, they both work fine.

Any ideas why? I'm assuming some sort of rights issue or that the file is still locked by the first MapReduce job, but I can't figure out why.