Delete a component
Useto delete a decommissioned component:
Decommision the component that you intend to delete.
- Using Ambari Web, browse the Hosts page.
- Find and click the FQDN of the host on which the component resides.
- In Components, find a decommissioned component.
If the component status is Started, stop it.
A decommissioned slave component may restart in the decommissioned state.
Click Delete from the Action
Deleting a slave component, such as a DataNode does not automatically inform a master component, such as a NameNode, to remove the slave component from its exclusion list.Adding a deleted slave component back into the cluster presents the following issue: The added slave remains decommissioned from the master's perspective. Restart the master component, as a work-around.
- Restart services.