Kafka Unable to connect to zookeeper server

[billkuku]

Hello,
i use zetcd with docker.
i have configured zookeeper_id of kafka to '192.168.1.110'
i have configured initial-cluster of etcd to 'etcd1=http://192.168.1.110:2380'
then i start the zetcd, etcd and kafka, it works, but~~
as i set more etcd-servers in initial-cluster, something like:
'etcd1=http://192.168.1.110:2380, etcd2=http://192.168.1.111:2380,etcd3=http://192.168.1.112:2380'
then kafka cannot connect to the etcd with:
'org.I0Itec.zkclient.exception.ZkTimeoutException: Unable to connect to zookeeper server '192.168.1.110:2181' with timeout of 10000 ms'