[GitHub] [dubbo] guohao commented on issue #8124: Fix the problem that in the Triple protocol, an error will be reported immediately when the service is exposed

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

guohao commented on issue #8124:
URL: https://github.com/apache/dubbo/issues/8124#issuecomment-875724629


   > such as:
   > 
   > ```
   > public void connectSync() {
   >         this.initPromise.awaitUninterruptibly(this.connectTimeout);
   >         long start = System.currentTimeMillis();
   >         while (!isAvailable()) {
   >             if(System.currentTimeMillis() - start <= connectTimeout) {
   >                 Thread.yield();
   >             }
   >         }
   >     }
   > ```
   
   All threads will wait as long as `connecTimeout` when the downstream service is unavailable.
   
   A passthrough `Promise` will be better in some negotiation scenarios such as H/2, ,the `Connection` will be available  when the promise  has been done  @xiaoheng1 
   


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