Etcd cluster unhealth

Hi,
I have 3 host setup and the etcd cluster is unhealthy.

Logs from one of the etcd container:

Get http://10.42.56.221:2379/health: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)

Logs from working etcd (etcd-1) container:

11/6/2017 1:52:15 PM2017-11-06 08:22:15.348323 E | etcdhttp: got unexpected response error (etcdserver: request timed out) [merged 1 repeated lines in 1.83s]
11/6/2017 1:52:17 PM2017-11-06 08:22:17.023534 I | raft: 9f0de1800d9c9dac is starting a new election at term 126655
11/6/2017 1:52:17 PM2017-11-06 08:22:17.023628 I | raft: 9f0de1800d9c9dac became candidate at term 126656
11/6/2017 1:52:17 PM2017-11-06 08:22:17.023691 I | raft: 9f0de1800d9c9dac received vote from 9f0de1800d9c9dac at term 126656
11/6/2017 1:52:17 PM2017-11-06 08:22:17.023725 I | raft: 9f0de1800d9c9dac [logterm: 15, index: 279895] sent vote request to 6c3a95d1222d97e1 at term 126656
11/6/2017 1:52:17 PM2017-11-06 08:22:17.023768 I | raft: 9f0de1800d9c9dac [logterm: 15, index: 279895] sent vote request to 76ed940514f0f2cb at term 126656
11/6/2017 1:52:19 PM2017-11-06 08:22:19.556158 E | etcdhttp: got unexpected response error (etcdserver: request timed out)
11/6/2017 1:52:21 PM2017-11-06 08:22:21.690058 E | etcdhttp: got unexpected response error (etcdserver: request timed out)
11/6/2017 1:52:22 PM2017-11-06 08:22:22.528078 I | raft: 9f0de1800d9c9dac is starting a new election at term 126656
11/6/2017 1:52:22 PM2017-11-06 08:22:22.528199 I | raft: 9f0de1800d9c9dac became candidate at term 126657
11/6/2017 1:52:22 PM2017-11-06 08:22:22.528220 I | raft: 9f0de1800d9c9dac received vote from 9f0de1800d9c9dac at term 126657
11/6/2017 1:52:22 PM2017-11-06 08:22:22.528260 I | raft: 9f0de1800d9c9dac [logterm: 15, index: 279895] sent vote request to 6c3a95d1222d97e1 at term 126657
11/6/2017 1:52:22 PM2017-11-06 08:22:22.528279 I | raft: 9f0de1800d9c9dac [logterm: 15, index: 279895] sent vote request to 76ed940514f0f2cb at term 126657
11/6/2017 1:52:28 PM2017-11-06 08:22:28.590954 E | etcdhttp: got unexpected response error (etcdserver: request timed out)
11/6/2017 1:52:29 PM2017-11-06 08:22:29.023646 I | raft: 9f0de1800d9c9dac is starting a new election at term 126657
11/6/2017 1:52:29 PM2017-11-06 08:22:29.023846 I | raft: 9f0de1800d9c9dac became candidate at term 126658
11/6/2017 1:52:29 PM2017-11-06 08:22:29.024230 I | raft: 9f0de1800d9c9dac received vote from 9f0de1800d9c9dac at term 126658
11/6/2017 1:52:29 PM2017-11-06 08:22:29.024318 I | raft: 9f0de1800d9c9dac [logterm: 15, index: 279895] sent vote request to 76ed940514f0f2cb at term 126658
11/6/2017 1:52:29 PM2017-11-06 08:22:29.024398 I | raft: 9f0de1800d9c9dac [logterm: 15, index: 279895] sent vote request to 6c3a95d1222d97e1 at term 126658
11/6/2017 1:52:30 PM2017-11-06 08:22:30.345882 E | etcdhttp: got unexpected response error (etcdserver: request timed out) [merged 1 repeated lines in

What is the issue?