[Hadoop-common-user] does hadoop support "submit a new different job in map function"?

Although you can, the design of your application would be unconventional.
Please see if you can redesign your application so that it doesn't have to
do this. Couldn't you run some algorithm on the client side, and depending
on that output, submit a job? The other case you might want to consider is
to have a series of jobs where the output of one job is the input of
another..

I don't agree that this would be considered unconventional, as I have
scenarios where this makes sense too - one file with a summary view,
and others that are very detailed and a pass over the first one
determines which ones to analyse properly in a second job.

I am a novice, but it looks like the slaves know about the Master
NameNode and JobTracker (in the Masters file), so it I think it is
worth trying.

Cheers,
Tim