Major Description
This is a problem for blueprint based deployments.
When deploying via a blueprint, on the configurations for the services being deployed are set. When deploying an HDFS only cluster, an exception is thrown that the configuration mapred_user is not set. This configuration property is not specified under the HDFS stack definition configurations.
Until this is fixed, a user who provisions via a bp will need to explicitly add this configuration to a blueprint which deploys only HDFS.