How to remove datanode entry in hadoop UI after decommissioning it

I have tried the below procedure to decommission the datanode.

1) added the node to be decommissioned in /tmp/exclude file.

2) added below tags in hdfs-site.xml and yarn-site.xml respectively

`<property>
    <name>dfs.hosts.exclude</name>
    <value>/tmp/exclude</value>
    <final>true</final>
    </property>`


`<property>
    <name>yarn.resourcemanager.nodes.exclude-path</name>
    <value>/tmp/exclude</value>
    <final>true</final> 
</property>`

3)executed below commands as "hadoop" user

`hdfs dfsadmin -refreshNodes
   yarn rmadmin -refreshNodes`.

Datanode got decommissioned and showing the node is "decommissioned" in UI. how can i permanently remove the node from UI??.

I tried "Namenode" service restart But dint worked.

Solution

Though the node is decommissioned, it continues to send heartbeats to the master,

Stop the Datanode and NodeManager process in the decommissioned node.
Then restart the Namenode.

And To remove the node entirely from any future start and stop process,

Remove the node entry from slaves file as well.