hadoop only launch local job by default why?

Question

I have written my own hadoop program and I can run using pseudo distribute mode in my own laptop, however, when I put the program in the cluster which can run example jar of

Answer 1

I had the same problem that every mapreduce v2 (mrv2) or yarn task only ran with the mapred.LocalJobRunner

INFO mapred.LocalJobRunner: Starting task: attempt_local284299729_0001_m_000000_0

The Resourcemanager and Nodemanagers were accessible and the mapreduce.framework.name was set to yarn.

Setting the HADOOP_MAPRED_HOME before executing the job fixed the problem for me.

export HADOOP_MAPRED_HOME=/usr/lib/hadoop-mapreduce

cheers dan