Starting, Stopping, Refreshing, and Restarting a Cluster
Minimum Required Role: Operator (also provided by Configurator, Cluster Administrator, Limited Cluster Administrator , and Full Administrator)
Complete the steps below to start, stop, refresh, and restart a cluster.
Starting a Cluster
- On the
tab, click
to the right of the cluster name and select Start. - Click Start that appears in the next screen to confirm. The
Command Details window shows the progress of starting services.
When All services successfully started appears, the task is complete and you can close the Command Details window.
Stopping a Cluster
- On the
tab, click to the right of the cluster name and select Stop.
- Click Stop in the confirmation screen. The Command
Details window shows the progress of stopping services.
When All services successfully stopped appears, the task is complete and you can close the Command Details window.
Refreshing a Cluster
Runs a cluster refresh action to bring the configuration up to date without restarting all
services. For example, certain masters (for example NameNode and ResourceManager) have some
configuration files (for example, fair-scheduler.xml,
mapred_hosts_allow.txt, topology.map) that can be
refreshed. If anything changes in those files then a refresh can be used to update them in
the master.
Here is a summary of the operations performed in a refresh action:
To refresh a cluster, in the tab, click to the right of the cluster name and select
Refresh Cluster.
Restarting a Cluster
- On the
tab,
click to the right of the cluster name and select Restart.
- Click Restart that appears in the next screen to confirm. If you have enabled
high availability for HDFS, you can choose Rolling Restart instead
to minimize cluster downtime. The Command Details window shows the progress of
stopping services.
When All services successfully started appears, the task is complete and you can close the Command Details window.
