Re-enable the Secondary NameNode
To re-enable the secondary NameNode:
Steps
Run the following commands on the Ambari Server host:
curl -u <AMBARI_USER>:<AMBARI_PW> -H "X-Requested-By: ambari" -i -X PUT -d '{"RequestInfo":{"context":"Enable Secondary NameNode"},"Body":{"HostRoles":{"state":"INSTALLED"}}}'<AMBARI_PROTO>://localhost:<AMBARI_PORT>/api/v1/clusters/<CLUSTER_NAME>/hosts/<SECONDARY_NAMENODE_HOSTNAME}/host_components/SECONDARY_NAMENODEAnalyze the output:
If this returns
200, proceed to delete all JournalNodes.If this input returns the value
202, wait a few minutes and then run the following command: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=SECONDARY_NAMENODE&fields=HostRoles/state"Wait for the response
"state" : "INSTALLED"before proceeding.
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