codelipenghui opened a new pull request #5388: [PIP-46] Introduce sticky 
consumer
URL: https://github.com/apache/pulsar/pull/5388
 
 
   ### Motivation
   
   Introduce sticky consumer, users can enable it by
   
   ```java
   client.newConsumer()
            
.keySharedPolicy(KeySharedPolicy.exclusiveHashRange().hashRangeTotal(10).ranges(Range.of(0,
 10)))
            .subscribe();
   ```
   
   ### Modifications
   
   Add a new consumer selector named 
HashRangeExclusiveStickyKeyConsumerSelector to support sticky consumer.
   
   This change added tests and can be verified as follows:
   
   Add new unit tests.
   
   ### 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): (no)
     - The public API: (yes)
     - The schema: (no)
     - The default values of configurations: (no)
     - The wire protocol: (yes)
     - The rest endpoints: (no)
     - The admin cli options: (no)
     - Anything that affects deployment: (no)
   
   ### Documentation
   
     - Does this pull request introduce a new feature? (yes)
   

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