Use to manage service operations on your cluster.
Manage a selected service on your cluster by performing
service actions.
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In the Services tab, click
Actions.
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In Actions, click an option.
Available options depend on the service you have selected
For example, HDFS service action options include:
Clicking Turn On Maintenance Mode suppresses alerts and
status indicator changes generated by the service, while allowing you to start, stop,
restart, move, or perform maintenance tasks on the service.