java.net.ConnectException: Connection refused

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Connection refused
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Connection refused
java.net.ConnectException: Connection refused
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:382)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:241)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:228)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:431)
at java.net.Socket.connect(Socket.java:527)
at org.apache.zookeeper.server.quorum.Learner.connectToLeader(Learner.java:225)
at org.apache.zookeeper.server.quorum.Follower.followLeader(Follower.java:71)

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