SpringBoot Dubbo 大坑之Caused by: java.net.BindException: Address already in use: bind

具体错误：

Caused by: org.jboss.netty.channel.ChannelException: Failed to bind to: /0.0.0.0:20880
	at org.jboss.netty.bootstrap.ServerBootstrap.bind(ServerBootstrap.java:303) ~[netty-3.2.5.Final.jar:na]
	at com.alibaba.dubbo.remoting.transport.netty.NettyServer.doOpen(NettyServer.java:93) ~[dubbo-2.6.2.jar:2.6.2]
	at com.alibaba.dubbo.remoting.transport.AbstractServer.(AbstractServer.java:63) ~[dubbo-2.6.2.jar:2.6.2]
	... 40 common frames omitted
Caused by: java.net.BindException: Address already in use: bind
	at sun.nio.ch.Net.bind0(Native Method) ~[na:1.8.0_71]
	at sun.nio.ch.Net.bind(Net.java:433) ~[na:1.8.0_71]
	at sun.nio.ch.Net.bind(Net.java:425) ~[na:1.8.0_71]

提供者配置文件：

dubbo:
  application:
    name: springboot-user-service
  registry:
    address: zookeeper://192.168.1.103:2181
  protocol:
    name: dubbo
    port: 20880

消费者配置文件：

dubbo:
  application:
    name: springboot-user-service
  registry:
    address: zookeeper://192.168.1.103:2181
  protocol:
    name: dubbo
    port: 20881

通常有些人不配置protocol会导致默认的端口为20880所以就出现了端口冲突。

原文地址：http://blog.liangxiaowu.com/#/detail/24