@philips Current log about this error is like this:
```
[etcd] May  7 00:38:11.318 INFO      | node6 attempted to join via 127.0.0.1:7001 failed: Client Internal Error (Get http://127.0.0.1:7001/version: dial tcp 127.0.0.1:7001: connection refused)
```
And I think it is clear enough.