Exception in thread "main" org.I0Itec.zkclient.exception.ZkTimeoutException: Unable to co
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问题：用Kafka创建topic时报错：Exception in thread "main" org.I0Itec.zkclient.exception.ZkTimeoutException: Unable to connect to zookeeper server within timeout: 30000
出现原因：多样，比如kafka没启动，服务器时间不同，防火墙没关。（下面的解决办法只供参考）
解决办法：
1、启动kafka。
2、请核实个服务器的时间。
3、关闭防火墙。
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