Step 8: Stop all Services

Before you enable security in CDH, you must stop all Hadoop daemons in your cluster and then change some configuration properties. You must stop all daemons in the cluster because after one Hadoop daemon has been restarted with the configuration properties set to enable security. Daemons running without security enabled will be unable to communicate with that daemon. This requirement to stop all daemons makes it impossible to do a rolling upgrade to enable security on a Hadoop cluster.

To stop all services on all hosts:

  1. Choose All Services from the Services tab.
  2. Choose Stop on the Actions menu for the Cloudera Management Services service. Click Stop that appears in the next screen to confirm. When you see a Finished status, the service has stopped.
  3. For the cluster where you want to enable security, choose Stop on the Actions menu. Click Stop that appears in the next screen to confirm.