gaozhangmin opened a new pull request #12025:
URL: https://github.com/apache/pulsar/pull/12025


   
   ### Motivation
   Suppose We have three bookies, `b1, b2, b3`,
   b1 and b2 divided into region  test, b3 not divided to any region.
   Namespace public/test  has set-affinity-group test.
   Now, the traffic of namespace public/test would be sent to b3 also, this is 
not behave as expected, which b3 should not be included.
   
   ### Modifications
   
   ignore the bookies which have not been divided into any region, when using  
`ZkIsolatedBookieEnsemblePlacementPolicy.java`
    
   ### Verifying this change
   
   This change added tests and can be verified as follows:
   testNonRegionBookie
   
   
   ### Does this pull request potentially affect one of the following parts:
   
   *If `yes` was chosen, please highlight the changes*
   
     - Dependencies (does it add or upgrade a dependency): (yes / no) no
     - The public API: (yes / no) no
     - The schema: (yes / no / don't know) no
     - The default values of configurations: (yes / no) no
     - The wire protocol: (yes / no) no
     - The rest endpoints: (yes / no) no
     - The admin cli options: (yes / no) no 
     - Anything that affects deployment: (yes / no / don't know)no 
   
   ### Documentation
   no need docs
   
   
   


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