Apache Ambari Operations
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Decommission a Component

To decommission a component (a DataNode, in the following example):


  1. Using Ambari Web, browse the Hosts page.

  2. Find and click the FQDN of the host on which the component resides.

  3. Using the Actions control, click Selected Hosts > DataNodes > Decommission:

The UI shows Decommissioning status while in process:

When this DataNode decommissioning process is finished, the status display changes to Decommissioned (shown here for NodeManager).