You may need to delete
any JournalNodes.
Check to see if you need to delete JournalNodes, on the Ambari
Server host:
curl -u [AMBARI_USER]:[AMBARI_PW] -H "X-Requested-By: ambari" -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 the additional NameNode. Otherwise you must delete the JournalNodes.
-
On the Ambari Server host, run the following command:
curl -u [AMBARI_USER]:[AMBARI_PW] -H "X-Requested-By: ambari" -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] -H "X-Requested-By: ambari" -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] -H "X-Requested-By: ambari" -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] -H "X-Requested-By: ambari" -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.
Delete all additional NameNodes.
