6.2.1.10. Delete All JournalNodes

You may need to delete any JournalNodes.

To check to see if you need to delete JournalNodes, on the Ambari Server host:
```
	curl -u ${AMBARI_USER}:${AMBARI_PW} -i -X GET ${AMBARI_PROTO}://localhost:${AMBARI_PORT}/api/v1/clusters/${CLUSTER_NAME}/host_components?HostRoles/component_name=JOURNALNODE
```
If this returns an empty items array, you can go on to Delete Additional NameNode. Otherwise you must delete the JournalNodes.

To delete the JournalNodes, on the Ambari Server host:

curl -u ${AMBARI_USER}:${AMBARI_PW} -i -X DELETE ${AMBARI_PROTO}://localhost:${AMBARI_PORT}/api/v1/clusters/${CLUSTER_NAME}/hosts/${JOURNALNODE1_HOSTNAME}/host_components/JOURNALNODE

curl -u ${AMBARI_USER}:${AMBARI_PW} -i -X DELETE ${AMBARI_PROTO}://localhost:${AMBARI_PORT}/api/v1/clusters/${CLUSTER_NAME}/hosts/${JOURNALNODE2_HOSTNAME}/host_components/JOURNALNODE 

curl -u ${AMBARI_USER}:${AMBARI_PW} -i -X DELETE ${AMBARI_PROTO}://localhost:${AMBARI_PORT}/api/v1/clusters/${CLUSTER_NAME}/hosts/${JOURNALNODE3_HOSTNAME}/host_components/JOURNALNODE

Verify that all the JournalNodes have been deleted. On the Ambari Server host:

curl -u ${AMBARI_USER}:${AMBARI_PW} -i -X GET ${AMBARI_PROTO}://localhost:${AMBARI_PORT}/api/v1/clusters/${CLUSTER_NAME}/host_components?HostRoles/component_name=JOURNALNODE

This should return an empty items array.

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