CouchDB cluster issue {"error":"setup_error","reason":"Cluster setup timed out waiting for nodes to connect"}

[BranislavDB]

Hi all , I tried to create couchDb cluster but when I tried to enable cluster

curl -X POST -H "Content-Type: application/json" http://admin:admin123ksed*@127.0.0.1:5984/_cluster_setup -d '{"action": "finish_cluster"}'

{"error":"setup_error","reason":"Cluster setup timed out waiting for nodes to connect"}

I'm new in CouchDB , therefore I don't know where is my mistake , but if I tried to check number of members

admin_user@dev-ksed-cdb1:~$ curl -X GET "http://admin:admin123ksed*@127.0.0.1:5984/_membership"
{"all_nodes":["couchdb@dev-ksed-cdb1"],"cluster_nodes":["couchdb@dev-ksed-cdb1","couchdb@dev-ksed-cdb2","couchdb@dev-ksed-cdb3"]}

it means I have only cluster_nodes no all_nodes .. I'm not sure if it could be i problem , can you help me

Thank You Brano