Apache Ambari update to version 1.4.2. This release of Apache Ambari includes the new features and improvements:
Ability to move Master Components (NN, SNN, JT, RM)
Simplified Local Repository Setup in Install Wizard
Support for multiple HBase masters
User customizable setting to disable “Background operations popup”
Stop/start all host components
Ability to add client components to a host
Ability to delete a host from a cluster