Use a rolling restart
to restart multiple components.
When you restart multiple components, use rolling
restarts to distribute the task. A rolling restart stops and then starts multiple
running slave components, such as DataNodes, NodeManagers, RegionServers, or Supervisors,
using a batch sequence. You set rolling restart parameter values to control the number,
time between, tolerance for failures, and limits for restarts of many components across
large clusters. | Important |
---|
Rolling restarts of DataNodes should be performed
only during cluster maintenance. |
-
In Services, click a service name.
-
In Summary, click a link, such as DataNodes or
RegionServers, of any components that you want to restart.
The Hosts page lists any host names in your cluster
on which that component resides.
-
Using the host-level Actions menu, click the name of a slave
component option. Then, click Restart.
-
Review and set values for Rolling Restart Parameters.
-
Optionally, reset the flag to restart only components with changed
configurations.
-
Click Trigger Rolling Restart.
Monitor the progress of the background operations.