You should be able to put it into DISCONNECTED mode by doing the following
call :
curl -v -X PUT -d "{\"node\":{\"status\":\"DISCONNECTING\”}}” -H
"Content-Type: application/json"
http://192.168.122.141:8080/nifi-api/controller/cluster/nodes/b89e8418-4b7f-4743-bdf4-4a08a92f3892
It should respond with an HTTP 200 and a message saying it went to state
DISCONNECTED.
That way you can access the GUI again and delete the node from the cluster
if you want to.
Tested this workaround with 1.2.0 and works.
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