YARN service management via ADCM
The ADCM UI provides actions to manage the YARN service and its components. For information on how to run service actions, refer to ADH service actions.
The actions available for the YARN service are listed in the table below.
For more information about YARN components, see YARN architecture.
| Action | Description |
|---|---|
Add/Remove components |
Running this action opens the component-host mapping interface where you can add, remove, and distribute YARN components |
Check |
Runs service-specific tests to check the health of the service and its components |
Start |
Starts the service.
When you run this action, the option Apply configs from ADCM is available.
If it is set to |
Stop |
Stops the service |
Restart |
Restarts the service.
When you run this action, the option Apply configs from ADCM is available.
If it is set to |
Remove |
Removes the service from the cluster.
This action should be used to remove already installed services.
Whereas the |
Decommiss/Recommiss NodeManagers |
Allows you to decommission/recommission NodeManager components.
The decommission action can be used to temporarily take a NodeManager out of service or to safely delete it.
When running this action, specify the hosts with NodeManagers to decommission in the Hosts in decommissioned mode list.
For each item in this list, specify the FQDN of the host (Enter field name) and the timeout in seconds to start the decommission process for that host (Enter field value).
By default, the decommission starts immediately.
After all hosts are specified, review the configuration and run the action.
To decommission a NodeManager gracefully, use the |
Manage Ranger plugin |
Enables or disables Ranger plugin for YARN |
Add/modify node labels |
Adds or changes node labels. You can use node labels to create groups of hosts, for example, to designate nodes to specific tasks or to manage nodes' resources between queues. When using this action, enter labels to be used in a cluster and their exclusivity ( |
Add/modify node-to-labels mapping |
Maps the node labels added using the Add/modify node labels action to the hosts. When using this action, enter the FQDNs of the hosts with NodeManager components and the labels you want to assign to them |
Reload Scheduler config |
Reloads access control lists, states, and scheduler specific properties. Use this action to apply changes made to Capacity Scheduler’s configuration file. Fair Scheduler doesn’t require reloading after its configuration has been altered |
Remove node label |
Removes node labels from the cluster. When using this action, enter the list of labels you want to remove separated by commas |
