Remove ats-hbase before switching between clusters

Before you migrate between secure and non-secure clusters or HA and non-HA clusters, you must remove ats-hbase from the source cluster. Otherwise, Timeline Service 2.0 might stop working.

You must destroy the ats-hbase service, remove its configuration from HDFS, and remove its specification file from HDFS.

	Note
	The following procedure explains with examples the process of removing the `ats-hbase` service for the `yarn-ats` user. If required, you must change the user based on your deployment. Similarly, you must use principal and keytab names different from those given in the following examples based on the deployment of your secure cluster.

Use the yarn app -destroy command to destroy the ats-hbase service.

On a non-secure cluster:
```
su - yarn-ats
yarn app -destroy ats-hbase
```

On a secure cluster:

su - yarn-ats
kinit -kt /etc/security/keytabs/yarn-ats.hbase-client.headless.keytab yarn-ats@EXAMPLE.COM
yarn app -destroy ats-hbase

Remove the ats-hbase configuration from HDFS.

On a non-secure cluster:

su - yarn-ats
hadoop fs -rm -R ./{stack_version}/*  #{stack_version} is 3.0.0.0-1557

On a secure cluster:

su - yarn-ats
kinit -kt /etc/security/keytabs/yarn-ats.hbase-client.headless.keytab yarn-ats@EXAMPLE.COM
hadoop fs -rm -R ./{stack_version}/*  #{stack_version} is 3.0.0.0-1557

Delete the specification file for ats-hbase from HDFS.

Note
You must be logged in as the hdfs user to perform this step.
- On a non-secure cluster:
```
su - hdfs
hadoop fs -rm -R /services/sync/yarn-ats/hbase.yarnfile
```
- On a secure cluster:
```
su - hdfs
kinit -kt /etc/security/keytabs/hdfs.headless.keytab hdfs@EXAMPLE.COM
hadoop fs -rm -R /services/sync/yarn-ats/hbase.yarnfile
```

	Note
	You must be logged in as the `hdfs` user to perform this step.