zookeeper启动报错Opening socket connection to server localhost/127.0.0.1:2181. Will not attempt to.....

  今天在学习zookeeper的时候，在linux上搭建单机版伪分布式集群zookeeper，启动一个zookeeper的时候是成功的，可是连上客户端的时候报了以下图的错误:linux Opening socket connection to server localhost/127.0.0.1:2181. Will not attempt to authenticate using SASL

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