By now I’ve shown you how to install a single node Hadoop cluster. This configures the cluster with HDFS and YARN functionality, but you may have noticed that submitting a MapReduce job doesn’t show anything in the YARN resource manager. If you are trying to understand how MapReduce interacts with YARN, this doesn’t help you…and it breaks the principle we’ve been trying to follow of trying to set up a cluster that works like a regular cluster that just happens to be on one node.
This post will show you the steps you need to set up MapReduce support in YARN in your cluster. Continue reading