when I use mongo cmd to connect to server, it works

my command is 

 

mongo --host ip  --port 8635 -u rwuser -p --authenticationDatabase admin --ssl --sslCAFile ca.crt --sslAllowInvalidHostnames

but if you use go driver to connect to db it fails , the uri is 

mongodb://rwuser:Tian_2020@ip:8635/test?authSource=admin&replicaSet=replica

 

{"level":"ERROR","timestamp":"2019-07-03 18:54:41.196 +08:00","file":"v1/common.go:97","msg":"[put] [\u003cnil\u003e] err:server selection error: server selection timeout\ncurrent topology: Type: ReplicaSetNoPrimary\nServers:\nAddr: :8635, Type: Unknown, State: Connected, Average RTT: 0, Last error: dial tcp :8635: connect: connection refused\n"}

 

 

Plz help