Set default Application Master resource limit
The Application Master (AM) resource limit that can be used to set a maximum percentage of cluster resources allocated specifically to Application Masters. This property has a default value of 10%, and exists to avoid cross-application deadlocks where significant resources in the cluster are occupied entirely by the Containers running ApplicationMasters.
The Maximum AM Resource Limit (yarn.scheduler.capacity.maximum-am-resource-percent) property also indirectly controls the number of concurrent running applications in the cluster, with each queue limited to a number of running applications proportional to its capacity.