Managing and Monitoring a Cluster
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Set Maintenance Mode for a service

How to set Maintenance Mode for a service and what happens when you do.

Setting Maintenance Mode enables you to suppress alerts and omit bulk operations for specific services, components, and hosts in an Ambari-managed cluster. Explicitly setting Maintenance Mode for a service implicitly sets Maintenance Mode for components and hosts that run the service. While Maintenance Mode prevents bulk operations being performed on the service, component, or host, you may explicitly start and stop a service, component, or host while in Maintenance Mode.
  1. Using Services, click a service name.
    For example, HDFS.
  2. Click Actions, then click Turn On Maintenance Mode.
  3. Click OK to confirm.
    Notice, on Services Summary that Maintenance Mode turns on for the NameNode and SNameNode components.