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.-
Using Services, click a service name.
For example, HDFS.
-
Click Actions, then click Turn On Maintenance
Mode.
-
Click OK to confirm.
Notice, on Services Summary that Maintenance Mode turns on
for the NameNode and SNameNode components.