java.net.ConnectException: Connection refused: no further information

场景：本地启动maven项目，工程使用spring版本3.1.3,zookeeper版本3.4.6，dubbo的jar包版本2.5.4,jetty版本6.1.26，容器resin-4.0.48，启动时出现错误
具体错误信息：

ClientCnxn|Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnectjava.net.ConnectException: Connection refused: no further informationat sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:692) at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361)at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1081) 

错误原因：Connection refused: no further information
初步判断应该是dubbo版本与zookeeper版本不兼容的问题

解决方式：maven依赖的dubbo版本由2.5.4更改为2.5.1，问题得到解决。