[GitHub] [dubbo] haoyann commented on issue #10300: provider提供hessian协议服务，consumer订阅该服务的时候，报错。

[GitBox <gi...@apache.org>]

haoyann commented on issue #10300:
URL: https://github.com/apache/dubbo/issues/10300#issuecomment-1181266421

   这个项目看起来是 `3.0.0` 的应用级的服务发现与 `2.7.x` 版本的协议结合使用。 `InstanceAddressUrl#setProtocol `  确实会抛出空指针异常。
   有两个方法可以解决一下你的问题：
   1.  InstanceAddressUrl  重写 `URL#setProtocol`  方法，支持可以修改 `protocol` 属性。
   2. `url.setProtocol("http").toJavaURL()` 这部分可以手动拼接一个 `http` 协议的 `java.net.URL`。


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