focuse8 opened a new issue, #12335:
URL: https://github.com/apache/dubbo/issues/12335

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   ### Environment
   
   * Dubbo version: 3.1.1
   * Operating System version: linux
   * Java version:1.8
   
   ### Steps to reproduce this issue
   
   1.  we use "offline" to shutdown dubbo app gracefully.  when we offline  
more than two instances, it is possible for consumers to get the phenomenon.   
   
   reviewing the dubbo source code, we find that  when offlining  a instance  
it will remove services in "MetadataInfo" but  
   the field "revision of MetadataInfo" won't change in time.  if a consumer 
requests metadatainfo from the offlining instance, it will response  the 
metadatainfo without services.
   
   
   Pls. provide [GitHub address] to reproduce this issue.
   
   ### Expected Behavior
   
   
   <!-- What do you expect from the above steps?-->
   
   ### Actual Behavior
   
   <!-- What actually happens? -->
   
   If there is an exception, please attach the exception trace:
   
   ```
   Just put your stack trace here!
   ```
   


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