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Resource manager

In a non-HA environemnt, there is one resource manager per cluster. It manages the resources within the cluster and executes services (such as the resource scheduler).

The resource manager schedules containers (which in turn are created, supervised and terminated by a node manager).

Services

The resource manager runs a few services, some of which are

The resource scheduler
The application mater liveness monitor
The node manager liveness monitor
Event handlers

Hostname

The hostname of the resource manager is configured by yarn.resourcemanager.hostname.

Web application

The web application can be contacted on http://${yarn.resourcemanager.webapp.address}/cluster

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