MR, Unable to initialize any output collector

http://stackoverflow.com/questions/26926571/cdh5-2-mr-unable-to-initialize-any-output-collector

Checking the full task log of the failed attempt

attempt_1415950730849_0001_m_000000_0

will
help tell why you ran into the given exception.

The most common reason of observing such an error is a misconfigured value of

io.sort.mb

in
your job. Its value must never be anywhere close to (or higher than) the configured map task heap size, and must also not currently exceed

~2000
MB

(Java array maximum size).

An upstream improvement of making the error more clear on the true failure was also filed and resolved recently, via MAPREDUCE-6194.