etcd v3.2 fails to start with multiple peer urls

[jsoriano]

Bug/question

Before etcd v3.2 multiple peer urls could be configured (e.g. ETCD_LISTEN_PEER_URLS=http://$private_ipv4:2380,http://$private_ipv4:7001).
But starting on 3.2.0 if a cluster is started or upgraded to this version with multiple peer urls it is continuously starting elections and it never reaches the healthy state (see coreos/bugs#2095), what is confusing.

As the flag is still plural we could think that it should still be supported. If it's not going to be supported I think it should fail to start with multiple peer urls.

[gyuho]

Can you provide full logs? Not just leader election parts.

[heyitsanthony]

confirmed via procfile:

etcd1: bin/etcd --name infra1 --listen-client-urls http://127.0.0.1:2379 --advertise-client-urls http://127.0.0.1:2379 --listen-peer-urls http://127.0.0.1:12380,http://127.0.0.1:12381 --initial-advertise-peer-urls http://127.0.0.1:12380 --initial-cluster-token etcd-cluster-1 --initial-cluster 'infra1=http://127.0.0.1:12380,infra2=http://127.0.0.1:22380,infra3=http://127.0.0.1:32380' --initial-cluster-state new --enable-pprof
etcd2: bin/etcd --name infra2 --listen-client-urls http://127.0.0.1:22379 --advertise-client-urls http://127.0.0.1:22379 --listen-peer-urls http://127.0.0.1:22380,http://127.0.0.1:22381 --initial-advertise-peer-urls http://127.0.0.1:22380 --initial-cluster-token etcd-cluster-1 --initial-cluster 'infra1=http://127.0.0.1:12380,infra2=http://127.0.0.1:22380,infra3=http://127.0.0.1:32380' --initial-cluster-state new --enable-pprof
etcd3: bin/etcd --name infra3 --listen-client-urls http://127.0.0.1:32379 --advertise-client-urls http://127.0.0.1:32379 --listen-peer-urls http://127.0.0.1:32380,http://127.0.0.1:32381 --initial-advertise-peer-urls http://127.0.0.1:32380 --initial-cluster-token etcd-cluster-1 --initial-cluster 'infra1=http://127.0.0.1:12380,infra2=http://127.0.0.1:22380,infra3=http://127.0.0.1:32380' --initial-cluster-state new --enable-pprof