Caused by: org.jboss.netty.channel.ChannelException: Failed to bind to: /0.0.0.0:20880

爱被打了一巴掌 2023-07-15 09:19 20阅读 0赞

问题描述: 在使用dubbo框架后,启动服务总是报错说端口占用

org.springframework.web.context.ContextLoader-331|Context initialization failed
    Caused by: com.alibaba.dubbo.remoting.RemotingException: Failed to bind NettyServer on /192.x.0.x:20880, cause: Failed to bind to: /0.0.0.0:20880
    Caused by: org.jboss.netty.channel.ChannelException: Failed to bind to: /0.0.0.0:20880
    Caused by: org.jboss.netty.channel.ChannelException: Failed to bind to: /0.0.0.0:20880
    Caused by: java.net.BindException: Address already in use

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hpZWp1bm5h_size_16_color_FFFFFF_t_70]  
运行环境: linux + tomcat

解决过程: 经过网上各方面查找这个问题,得到思路如下:  
1.dubbo提供者端口号占用,换一个端口试一下,例如:之前用的20880,现在可以换成20881,或者其他,此方式试了一下,我的问题并不属于这种情况的  
2.用命令查看下是什么占用了端口,杀进程,重启.例如:  
netstat -tunlp|grep 20880  
ps -ef|grep 12345  
kill -9 12345  
./startup.sh  
经过尝试还是占用  
3.spring项目中的配置文件加载了两次,启动后端口占用的情况,是复核我的问题的,  
启动后的项目日志看了一下,还真是配置文件加载了两次,如下:

这样问题就明确了,配置文件中dubbo提供者的端口加载一次,启动一次就可以了,现在启了两次,端口必须占用呀,然后修改tomcat配置文件,使其加载一次  
修改tomcat/conf/server.xml

未修改之前的(Context标签内,docBase=“项目名称”)

修改之后的(Context标签内,docBase="")

再来看下启动后的项目日志文件,配置文件加载了一次,端口占用的错误已经没有了

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hpZWp1bm5h_size_16_color_FFFFFF_t_70]: /images/20230528/a2381ed5d614421f938b9f864fbe158c.png

Caused by: org.jboss.netty.channel.ChannelException: Failed to bind to: /0.0.0.0:20880

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