Hi all,
I am a new hadoop user and I am now writting my own map reduce
operations but it is hard for me to find out where comes from the
problem when the job fails.
So my question is : What is the best way to debug a map reduce job ?
Actually I try to log debug messages using LOG4J but not all of my
messages are logged and I do not know why.
I also try to throw exceptions when something goes wrong but I am not
really sure all exceptions are very well catched by the hadoop system.
Am I wrong ?
I will appreciate some tips and advices to be able to increase my
productivity in developping map and reduce jobs.
Thanks for any help.
Thomas.
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Thomas FRIOL
Développeur Eclipse / Eclipse Developer
Solutions & Technologies
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