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[GitHub] [dubbo] JavaLionLi opened a new issue, #10899: dubbo 启动警告 warn [DUBBO] Failed to start NettyClient 'xxx'connect to the server 'yyy' (check == false, ignore and retry later!)
JavaLionLi opened a new issue, #10899:
URL: https://github.com/apache/dubbo/issues/10899
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- [ ] I have searched the [issues](https://github.com/apache/dubbo/issues) of this repository and believe that this is not a duplicate.
### Environment
* Dubbo version: 3.0.X 3.1.X
* Operating System version: xxx
* Java version: 1.8
### Steps to reproduce this issue
1. 参考另一篇文章 把check=false和dynamic=true设置了 还是不行
2. 启动AB两个之后 关闭B 重启A会去检查B 导致报错
3. xxx
Pls. provide [GitHub address] to reproduce this issue.
### Expected Behavior
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### Actual Behavior
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[GitHub] [dubbo] JavaLionLi commented on issue #10899: dubbo 启动警告 warn [DUBBO] Failed to start NettyClient 'xxx'connect to the server 'yyy' (check == false, ignore and retry later!)
Posted by GitBox <gi...@apache.org>.
JavaLionLi commented on issue #10899:
URL: https://github.com/apache/dubbo/issues/10899#issuecomment-1308281191
> 这个报错是注册中心推送地址后地址不可达的报错（有可用地址，但是地址连接失败）。
>
> 这里的 `check` 的作用是避免注册中心直接剔除这个地址（如果注册中心链路上有报错会直接剔除），日志中的报错在生产定位原因的时候是必要的。即使是没有通过地址剔除这种严格的处理也不应该任何日志不留存，否则在调用出现不通或者报错的时候会给分析带来难度（是注册中心问题还是网络问题还是使用方式问题等等）。
>
> 从规范上来说，注册中心是不应该推送不可达地址的，根本应该解决的问题是应该保证下游服务都启动完毕。
异常下线是应该留日志 但是正常下线也还是会报这个 这这不是个bug
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[GitHub] [dubbo] JavaLionLi commented on issue #10899: dubbo 启动警告 warn [DUBBO] Failed to start NettyClient 'xxx'connect to the server 'yyy' (check == false, ignore and retry later!)
Posted by GitBox <gi...@apache.org>.
JavaLionLi commented on issue #10899:
URL: https://github.com/apache/dubbo/issues/10899#issuecomment-1308156254
设置了不检查 还疯狂连接报错 这设置意义何在呢
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[GitHub] [dubbo] AlbumenJ commented on issue #10899: dubbo 启动警告 warn [DUBBO] Failed to start NettyClient 'xxx'connect to the server 'yyy' (check == false, ignore and retry later!)
Posted by GitBox <gi...@apache.org>.
AlbumenJ commented on issue #10899:
URL: https://github.com/apache/dubbo/issues/10899#issuecomment-1310208040
> > 可以给一个复现方式嘛
>
> https://gitee.com/JavaLionLi/RuoYi-Cloud-Plus/tree/dev/ 这个项目dev分支 开发中经常重启system生产者和auth消费者 就会报这个错误 很容易复现
按照示例文档没办法把项目启起来……
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[GitHub] [dubbo] JavaLionLi commented on issue #10899: dubbo 启动警告 warn [DUBBO] Failed to start NettyClient 'xxx'connect to the server 'yyy' (check == false, ignore and retry later!)
Posted by GitBox <gi...@apache.org>.
JavaLionLi commented on issue #10899:
URL: https://github.com/apache/dubbo/issues/10899#issuecomment-1308148631
感觉这块设计的非常有问题
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[GitHub] [dubbo] AlbumenJ commented on issue #10899: dubbo 启动警告 warn [DUBBO] Failed to start NettyClient 'xxx'connect to the server 'yyy' (check == false, ignore and retry later!)
Posted by GitBox <gi...@apache.org>.
AlbumenJ commented on issue #10899:
URL: https://github.com/apache/dubbo/issues/10899#issuecomment-1308294990
元数据是不随着服务上线生命周期清理的，这个不影响订阅。
可以试下在有两台机器的时候下线一台吗，或者是注册中心 url 配置加上 `enable-empty-protection=false`
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[GitHub] [dubbo] JavaLionLi closed issue #10899: dubbo 启动警告 warn [DUBBO] Failed to start NettyClient 'xxx'connect to the server 'yyy' (check == false, ignore and retry later!)
Posted by GitBox <gi...@apache.org>.
JavaLionLi closed issue #10899: dubbo 启动警告 warn [DUBBO] Failed to start NettyClient 'xxx'connect to the server 'yyy' (check == false, ignore and retry later!)
URL: https://github.com/apache/dubbo/issues/10899
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[GitHub] [dubbo] JavaLionLi commented on issue #10899: dubbo 启动警告 warn [DUBBO] Failed to start NettyClient 'xxx'connect to the server 'yyy' (check == false, ignore and retry later!)
Posted by GitBox <gi...@apache.org>.
JavaLionLi commented on issue #10899:
URL: https://github.com/apache/dubbo/issues/10899#issuecomment-1308139134
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[GitHub] [dubbo] AlbumenJ commented on issue #10899: dubbo 启动警告 warn [DUBBO] Failed to start NettyClient 'xxx'connect to the server 'yyy' (check == false, ignore and retry later!)
Posted by GitBox <gi...@apache.org>.
AlbumenJ commented on issue #10899:
URL: https://github.com/apache/dubbo/issues/10899#issuecomment-1308282878
> 生产者停机之后 为啥消费者启动还是能收到这个
剩余多少机器，是最后一台还是还有剩余机器。这台下线的机器注册中心中是否已经摘除。
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[GitHub] [dubbo] JavaLionLi commented on issue #10899: dubbo 启动警告 warn [DUBBO] Failed to start NettyClient 'xxx'connect to the server 'yyy' (check == false, ignore and retry later!)
Posted by GitBox <gi...@apache.org>.
JavaLionLi commented on issue #10899:
URL: https://github.com/apache/dubbo/issues/10899#issuecomment-1308145073
看了一下源码 如果等于check等于false直接就会报警告
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[GitHub] [dubbo] JavaLionLi commented on issue #10899: dubbo 启动警告 warn [DUBBO] Failed to start NettyClient 'xxx'connect to the server 'yyy' (check == false, ignore and retry later!)
Posted by GitBox <gi...@apache.org>.
JavaLionLi commented on issue #10899:
URL: https://github.com/apache/dubbo/issues/10899#issuecomment-1308381750
> > 只要有一台生产者还活着 就不会报这个错误
>
> 那就是推空保护导致的在无 provider 的时候会留下最后一台 provider 去尝试连接。
>
> > 加了这个参数也一样 还是报错
>
> 参数是这样配置的 `nacos://127.0.0.1:8848?enable-empty-protection=false`？
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[GitHub] [dubbo] AlbumenJ commented on issue #10899: dubbo 启动警告 warn [DUBBO] Failed to start NettyClient 'xxx'connect to the server 'yyy' (check == false, ignore and retry later!)
Posted by GitBox <gi...@apache.org>.
AlbumenJ commented on issue #10899:
URL: https://github.com/apache/dubbo/issues/10899#issuecomment-1308450279
可以给一个复现方式嘛
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[GitHub] [dubbo] chickenlj commented on issue #10899: dubbo 启动警告 warn [DUBBO] Failed to start NettyClient 'xxx'connect to the server 'yyy' (check == false, ignore and retry later!)
Posted by GitBox <gi...@apache.org>.
chickenlj commented on issue #10899:
URL: https://github.com/apache/dubbo/issues/10899#issuecomment-1311164091
>
这个是一个默认行为问题。为了高可用设计考虑，消费端开启了`推空地址包括（当注册中心推送过来空地址列表的时候，忽略这条通知，因为在生产环境中不允许出现）`。也就是要么包 ‘无地址’、要么报 ‘地址连接不上’
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[GitHub] [dubbo] JavaLionLi commented on issue #10899: dubbo 启动警告 warn [DUBBO] Failed to start NettyClient 'xxx'connect to the server 'yyy' (check == false, ignore and retry later!)
Posted by GitBox <gi...@apache.org>.
JavaLionLi commented on issue #10899:
URL: https://github.com/apache/dubbo/issues/10899#issuecomment-1308279685
> 这个报错是注册中心推送地址后地址不可达的报错（有可用地址，但是地址连接失败）。
>
> 这里的 `check` 的作用是避免注册中心直接剔除这个地址（如果注册中心链路上有报错会直接剔除），日志中的报错在生产定位原因的时候是必要的。即使是没有通过地址剔除这种严格的处理也不应该任何日志不留存，否则在调用出现不通或者报错的时候会给分析带来难度（是注册中心问题还是网络问题还是使用方式问题等等）。
>
> 从规范上来说，注册中心是不应该推送不可达地址的，根本应该解决的问题是应该保证下游服务都启动完毕。
那就涉及到另一个bug了 生产者停机之后 为啥消费者启动还是能收到这个
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[GitHub] [dubbo] JavaLionLi commented on issue #10899: dubbo 启动警告 warn [DUBBO] Failed to start NettyClient 'xxx'connect to the server 'yyy' (check == false, ignore and retry later!)
Posted by GitBox <gi...@apache.org>.
JavaLionLi commented on issue #10899:
URL: https://github.com/apache/dubbo/issues/10899#issuecomment-1308183708
通过修改 AbstractClient 源码 check=false 直接停止后续连接操作 所有报错都解决了 功能也都正常
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[GitHub] [dubbo] JavaLionLi commented on issue #10899: dubbo 启动警告 warn [DUBBO] Failed to start NettyClient 'xxx'connect to the server 'yyy' (check == false, ignore and retry later!)
Posted by GitBox <gi...@apache.org>.
JavaLionLi commented on issue #10899:
URL: https://github.com/apache/dubbo/issues/10899#issuecomment-1308460216
> 可以给一个复现方式嘛
https://gitee.com/JavaLionLi/RuoYi-Cloud-Plus/tree/dev/ 这个项目dev分支 开发中经常重启system生产者和auth消费者 就会报这个错误 很容易复现
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[GitHub] [dubbo] JavaLionLi commented on issue #10899: dubbo 启动警告 warn [DUBBO] Failed to start NettyClient 'xxx'connect to the server 'yyy' (check == false, ignore and retry later!)
Posted by GitBox <gi...@apache.org>.
JavaLionLi commented on issue #10899:
URL: https://github.com/apache/dubbo/issues/10899#issuecomment-1308145635
但是下面的异常栈输出又是哪来的呢
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[GitHub] [dubbo] JavaLionLi commented on issue #10899: dubbo 启动警告 warn [DUBBO] Failed to start NettyClient 'xxx'connect to the server 'yyy' (check == false, ignore and retry later!)
Posted by GitBox <gi...@apache.org>.
JavaLionLi commented on issue #10899:
URL: https://github.com/apache/dubbo/issues/10899#issuecomment-1308165841
首先 创建NettyClient连接报error 然后因为设置了 check=false 再报一条warn 哭笑不得
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[GitHub] [dubbo] AlbumenJ commented on issue #10899: dubbo 启动警告 warn [DUBBO] Failed to start NettyClient 'xxx'connect to the server 'yyy' (check == false, ignore and retry later!)
Posted by GitBox <gi...@apache.org>.
AlbumenJ commented on issue #10899:
URL: https://github.com/apache/dubbo/issues/10899#issuecomment-1308272887
这个报错是注册中心推送地址后地址不可达的报错（有可用地址，但是地址连接失败）。
这里的 `check` 的作用是避免注册中心直接剔除这个地址（如果注册中心链路上有报错会直接剔除），日志中的报错在生产定位原因的时候是必要的。即使是没有通过地址剔除这种严格的处理也不应该任何日志不留存，否则在调用出现不通或者报错的时候会给分析带来难度（是注册中心问题还是网络问题还是使用方式问题等等）。
从规范上来说，注册中心是不应该推送不可达地址的，根本应该解决的问题是应该保证下游服务都启动完毕。
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[GitHub] [dubbo] JavaLionLi commented on issue #10899: dubbo 启动警告 warn [DUBBO] Failed to start NettyClient 'xxx'connect to the server 'yyy' (check == false, ignore and retry later!)
Posted by GitBox <gi...@apache.org>.
JavaLionLi commented on issue #10899:
URL: https://github.com/apache/dubbo/issues/10899#issuecomment-1308372797
> > 只要有一台生产者还活着 就不会报这个错误
>
> 那就是推空保护导致的在无 provider 的时候会留下最后一台 provider 去尝试连接。
>
> > 加了这个参数也一样 还是报错
>
> 参数是这样配置的 `nacos://127.0.0.1:8848?enable-empty-protection=false`？
是的 一模一样 没什么效果
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[GitHub] [dubbo] JavaLionLi commented on issue #10899: dubbo 启动警告 warn [DUBBO] Failed to start NettyClient 'xxx'connect to the server 'yyy' (check == false, ignore and retry later!)
Posted by GitBox <gi...@apache.org>.
JavaLionLi commented on issue #10899:
URL: https://github.com/apache/dubbo/issues/10899#issuecomment-1308284238
> > 生产者停机之后 为啥消费者启动还是能收到这个
>
> 剩余多少机器，是最后一台还是还有剩余机器。这台下线的机器注册中心中是否已经摘除。
基本都是开发的时候报这个错误 生产者重启 就一台 nacos该服务已经下线 但是元数据还有并没有删除
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[GitHub] [dubbo] JavaLionLi commented on issue #10899: dubbo 启动警告 warn [DUBBO] Failed to start NettyClient 'xxx'connect to the server 'yyy' (check == false, ignore and retry later!)
Posted by GitBox <gi...@apache.org>.
JavaLionLi commented on issue #10899:
URL: https://github.com/apache/dubbo/issues/10899#issuecomment-1308342905
> 元数据是不随着服务上线生命周期清理的，这个不影响订阅。 可以试下在有两台机器的时候下线一台吗，或者是注册中心 url 配置加上 `enable-empty-protection=false`
下线其中一台并没有影响 先启动生产者B 然后停止B 启动消费者A 就会报这个错误了 启动过程中报错 加了这个参数也一样 还是报错
只要有一台生产者还活着 就不会报这个错误
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[GitHub] [dubbo] AlbumenJ commented on issue #10899: dubbo 启动警告 warn [DUBBO] Failed to start NettyClient 'xxx'connect to the server 'yyy' (check == false, ignore and retry later!)
Posted by GitBox <gi...@apache.org>.
AlbumenJ commented on issue #10899:
URL: https://github.com/apache/dubbo/issues/10899#issuecomment-1308370345
> 只要有一台生产者还活着 就不会报这个错误
那就是推空保护导致的在无 provider 的时候会留下最后一台 provider 去尝试连接。
> 加了这个参数也一样 还是报错
参数是这样配置的 `nacos://127.0.0.1:8848?enable-empty-protection=false`？
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[GitHub] [dubbo] AlbumenJ commented on issue #10899: dubbo 启动警告 warn [DUBBO] Failed to start NettyClient 'xxx'connect to the server 'yyy' (check == false, ignore and retry later!)
Posted by GitBox <gi...@apache.org>.
AlbumenJ commented on issue #10899:
URL: https://github.com/apache/dubbo/issues/10899#issuecomment-1308410875
`enable-empty-protection=false` 配置到下面的 parameters 里面
```yaml
registry:
address: nacos://xxx
group: DUBBO_GROUP
parameters:
namespace: xxx
enable-empty-protection: false
```
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[GitHub] [dubbo] JavaLionLi commented on issue #10899: dubbo 启动警告 warn [DUBBO] Failed to start NettyClient 'xxx'connect to the server 'yyy' (check == false, ignore and retry later!)
Posted by GitBox <gi...@apache.org>.
JavaLionLi commented on issue #10899:
URL: https://github.com/apache/dubbo/issues/10899#issuecomment-1308442304
> `enable-empty-protection=false` 配置到下面的 parameters 里面
>
> ```yaml
> registry:
> address: nacos://xxx
> group: DUBBO_GROUP
> parameters:
> namespace: xxx
> enable-empty-protection: false
> ```
还是一样 测了好半天
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