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Posted to notifications@dubbo.apache.org by "sducxh (via GitHub)" <gi...@apache.org> on 2023/04/21 02:34:32 UTC
[GitHub] [dubbo] sducxh opened a new issue, #12154: 2.6.2客户端不能解析3.2.0的response（Unknown result flag, expect '0' '1' '2', get 4）
sducxh opened a new issue, #12154:
URL: https://github.com/apache/dubbo/issues/12154
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- [x] I have searched the [issues](https://github.com/apache/dubbo/issues) of this repository and believe that this is not a duplicate.
## My question
搜索了以前的issue，存在过相同的问题，修复方式是在 `Version` 类中对 `release版本号` 做兼容，`2.6.3` 是个分界版本；在 `3.2.0` 的源码中， `protocol版本号` 在 [2.0.2, 2.0.99] 范围内，response类型就会赋值为 4 ，而在 `2.6.2` 之前的客户端只能处理 0、1、2的值，出现异常：Unknown result flag, expect '0' '1' '2', get 4。
如果我要升级服务端，客户端也至少要升级到2.6.3的版本，才可以兼容，但公司内又有基于2.6.2的内部版本，存在升级困难。
## Describe the proposal
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在我的debug中（客户端2.6.2，server端3.2.0），server端对response encode时，version值是协议版本号 `2.0.2`
有没有可能：在以后的实现中response的类型基于客户端的版本返回
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[GitHub] [dubbo] AlbumenJ commented on issue #12154: 2.6.2客户端不能解析3.2.0的response（Unknown result flag, expect '0' '1' '2', get 4）
Posted by "AlbumenJ (via GitHub)" <gi...@apache.org>.
AlbumenJ commented on issue #12154:
URL: https://github.com/apache/dubbo/issues/12154#issuecomment-1517456389
现在 Server 应该会判断 Client 请求的版本号的，如果是低版本的 Client 则不会发送 3 和 4。
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[GitHub] [dubbo] AlbumenJ commented on issue #12154: 2.6.2客户端不能解析3.2.0的response（Unknown result flag, expect '0' '1' '2', get 4）
Posted by "AlbumenJ (via GitHub)" <gi...@apache.org>.
AlbumenJ commented on issue #12154:
URL: https://github.com/apache/dubbo/issues/12154#issuecomment-1521297555
> 都是2.0.2： 
>
> 
那确定 60650 这个端口对应的进程 Dubbo 版本是 2.6.2？
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[GitHub] [dubbo] AlbumenJ commented on issue #12154: 2.6.2客户端不能解析3.2.0的response（Unknown result flag, expect '0' '1' '2', get 4）
Posted by "AlbumenJ (via GitHub)" <gi...@apache.org>.
AlbumenJ commented on issue #12154:
URL: https://github.com/apache/dubbo/issues/12154#issuecomment-1517456778
可以提供一个有问题的 demo 吗，我这边验证是没问题的
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[GitHub] [dubbo] sducxh commented on issue #12154: 2.6.2客户端不能解析3.2.0的response（Unknown result flag, expect '0' '1' '2', get 4）
Posted by "sducxh (via GitHub)" <gi...@apache.org>.
sducxh commented on issue #12154:
URL: https://github.com/apache/dubbo/issues/12154#issuecomment-1518919254
> 现在 Server 应该会判断 Client 请求的版本号的，如果是低版本的 Client 则不会发送 3 和 4。
我还不清楚哪部分代码会拿到client的版本号，假设3.2.0的版本是根据client的版本返回的，那么2.6.2的client版本是release版本，即：2.6.2，而我debug时，3.2.0的server version值是2.0.2
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[GitHub] [dubbo] sducxh commented on issue #12154: 2.6.2客户端不能解析3.2.0的response（Unknown result flag, expect '0' '1' '2', get 4）
Posted by "sducxh (via GitHub)" <gi...@apache.org>.
sducxh commented on issue #12154:
URL: https://github.com/apache/dubbo/issues/12154#issuecomment-1521291690
都是2.0.2：
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[GitHub] [dubbo] AlbumenJ commented on issue #12154: 2.6.2客户端不能解析3.2.0的response（Unknown result flag, expect '0' '1' '2', get 4）
Posted by "AlbumenJ (via GitHub)" <gi...@apache.org>.
AlbumenJ commented on issue #12154:
URL: https://github.com/apache/dubbo/issues/12154#issuecomment-1518984852
> 3.2.0的server version值是2.0.2
这个是没问题的，但是对于 Response 会从 Request 获取
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[GitHub] [dubbo] sducxh commented on issue #12154: 2.6.2客户端不能解析3.2.0的response（Unknown result flag, expect '0' '1' '2', get 4）
Posted by "sducxh (via GitHub)" <gi...@apache.org>.
sducxh commented on issue #12154:
URL: https://github.com/apache/dubbo/issues/12154#issuecomment-1519015421
>
来自2.6.2 的request：
response这里就是4了
然后到client就异常：
java.io.IOException: Unknown result flag, expect '0' '1' '2', get 4
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[GitHub] [dubbo] sducxh commented on issue #12154: 2.6.2客户端不能解析3.2.0的response（Unknown result flag, expect '0' '1' '2', get 4）
Posted by "sducxh (via GitHub)" <gi...@apache.org>.
sducxh commented on issue #12154:
URL: https://github.com/apache/dubbo/issues/12154#issuecomment-1521320675
>
> 那确定 60650 这个端口对应的进程 Dubbo 版本是 2.6.2？
确定是的，两个截图端口不一样是分了两次请求debug的。重测同样：
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[GitHub] [dubbo] AlbumenJ commented on issue #12154: 2.6.2客户端不能解析3.2.0的response（Unknown result flag, expect '0' '1' '2', get 4）
Posted by "AlbumenJ (via GitHub)" <gi...@apache.org>.
AlbumenJ commented on issue #12154:
URL: https://github.com/apache/dubbo/issues/12154#issuecomment-1519427244
这个堆栈发一下
从这里：
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