用kafka命令发送消息时候，一直显示WARN Error while fetching metadata with correlation id 1 : {test=LEADER_NOT_AVAILABLE} (org.apache.kafka.clients.NetworkClient)

如下操作：
[root@localhost bin]# pwd
/usr/local/kafka/bin
[root@localhost bin]# cd ..
[root@localhost kafka]# bin/kafka-topics.sh --create --zookeeper localhost:2181 --replication-factor 2 --partitions 4 --topic test
Error while executing topic command : Topic 'test' already exists.
[2017-09-14 04:16:51,020] ERROR org.apache.kafka.common.errors.TopicExistsException: Topic 'test' already exists.
(kafka.admin.TopicCommand$)
[root@localhost kafka]# bin/kafka-console-producer.sh --broker-list localhost:9092 --topic test

nihao
[2017-09-14 04:17:11,243] WARN Error while fetching metadata with correlation id 1 : {test=LEADER_NOT_AVAILABLE} (org.apache.kafka.clients.NetworkClient)
[2017-09-14 04:17:11,344] WARN Error while fetching metadata with correlation id 2 : {test=LEADER_NOT_AVAILABLE} (org.apache.kafka.clients.NetworkClient)
[2017-09-14 04:17:11,448] WARN Error while fetching metadata with correlation id 3 : {test=LEADER_NOT_AVAILABLE} (org.apache.kafka.clients.NetworkClient)
[2017-09-14 04:17:11,550] WARN Error while fetching metadata with correlation id 4 : {test=LEADER_NOT_AVAILABLE} (org.apache.kafka.clients.NetworkClient)
[2017-09-14 04:17:11,654] WARN Error while fetching metadata with correlation id 5 : {test=LEADER_NOT_AVAILABLE} (org.apache.kafka.clients.NetworkClient)
[2017-09-14 04:17:11,758] WARN Error while fetching metadata with correlation id 6 : {test=LEADER_NOT_AVAILABLE} (org.apache.kafka.clients.NetworkClient)
[2017-09-14 04:17:11,860] WARN Error while fetching metadata with correlation id 7 : {test=LEADER_NOT_AVAILABLE} (org.apache.kafka.clients.NetworkClient)
[2017-09-14 04:17:11,964] WARN Error while fetching metadata with correlation id 8 : {test=LEADER_NOT_AVAILABLE} (org.apache.kafka.clients.NetworkClient)
[2017-09-14 04:17:12,068] WARN Error while fetching metadata with correlation id 9 : {test=LEADER_NOT_AVAILABLE} (org.apache.kafka.clients.NetworkClient)
[2017-09-14 04:17:12,172] WARN Error while fetching metadata with correlation id 10 : {test=LEADER_NOT_AVAILABLE} (org.apache.kafka.clients.NetworkClient)
[2017-09-14 04:17:12,274] WARN Error while fetching metadata with correlation id 11 : {test=LEADER_NOT_AVAILABLE} (org.apache.kafka.clients.NetworkClient)
[2017-09-14 04:17:12,378] WARN Error while fetching metadata with correlation id 12 : {test=LEADER_NOT_AVAILABLE} (org.apache.kafka.clients.NetworkClient)
[2017-09-14 04:17:12,482] WARN Error while fetching metadata with correlation id 13 : {test=LEADER_NOT_AVAILABLE} (org.apache.kafka.clients.NetworkClient)
[2017-09-14 04:17:12,585] WARN Error while fetching metadata with correlation id 14 : {test=LEADER_NOT_AVAILABLE} (org.apache.kafka.clients.NetworkClient)
[2017-09-14 04:17:12,689] WARN Error while fetching metadata with correlation id 15 : {test=LEADER_NOT_AVAILABLE} (org.apache.kafka.clients.NetworkClient)
[2017-09-14 04:17:12,793] WARN Error while fetching metadata with correlation id 16 : {test=LEADER_NOT_AVAILABLE} (org.apache.kafka.clients.NetworkClient)
[2017-09-14 04:17:12,897] WARN Error while fetching metadata with correlation id 17 : {test=LEADER_NOT_AVAILABLE} (org.apache.kafka.clients.NetworkClient)
[2017-09-14 04:17:13,001] WARN Error while fetching metadata with correlation id 18 : {test=LEADER_NOT_AVAILABLE} (org.apache.kafka.clients.NetworkClient)
[2017-09-14 04:17:13,104] WARN Error while fetching metadata with correlation id 19 : {test=LEADER_NOT_AVAILABLE} (org.apache.kafka.clients.NetworkClient)
[2017-09-14 04:17:13,207] WARN Error while fetching metadata with correlation id 20 : {test=LEADER_NOT_AVAILABLE} (org.apache.kafka.clients.NetworkClient)
[2017-09-14 04:17:13,311] WARN Error while fetching metadata with correlation id 21 : {test=LEADER_NOT_AVAILABLE} (org.apache.kafka.clients.NetworkClient)
[2017-09-14 04:17:13,413] WARN Error while fetching metadata with correlation id 22 : {test=LEADER_NOT_AVAILABLE} (org.apache.kafka.clients.NetworkClient)
[2017-09-14 04:17:13,517] WARN Error while fetching metadata with correlation id 23 : {test=LEADER_NOT_AVAILABLE} (org.apache.kafka.clients.NetworkClient)

求解决