Resource Manager is responsible for scheduling applications and tracking resources in a cluster. Prior to Hadoop 2.4, the Resource Manager does not have option to be setup for HA and is a SINGLE point of FAILURE in a YARN cluster.

Since Hadoop 2.4, YARN Resource Manager can be setup for high availability. High availability of Resource Manager is enabled by use of Active/Standby architecture. At any point of time, one Resource Manager is active and one or more of Resource Managers are in the standby mode. In CASE the active Resource Manager fails, one of the standby Resource Managers transitions to an active mode.

Resource Manager is responsible for scheduling applications and tracking resources in a cluster. Prior to Hadoop 2.4, the Resource Manager does not have option to be setup for HA and is a single point of failure in a YARN cluster.

Since Hadoop 2.4, YARN Resource Manager can be setup for high availability. High availability of Resource Manager is enabled by use of Active/Standby architecture. At any point of time, one Resource Manager is active and one or more of Resource Managers are in the standby mode. In case the active Resource Manager fails, one of the standby Resource Managers transitions to an active mode.