Starting, Stopping, Refreshing, and Restarting a Cluster

Complete the steps below to start, stop, refresh, and restart a cluster.

Starting a Cluster

  1. On the Home > Status tab, click to the right of the cluster name and select Start.
  2. 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

  1. On the Home > Status tab, click to the right of the cluster name and select Stop.
  2. 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 Home > Status tab, click to the right of the cluster name and select Refresh Cluster.

Restarting a Cluster

  1. On the Home > Status tab, click to the right of the cluster name and select Restart.
  2. 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.