[GitHub] [pulsar] mantuliu opened a new issue #10750: Consumer cannot consume messages when key_shared mode

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

mantuliu opened a new issue #10750:
URL: https://github.com/apache/pulsar/issues/10750


   **Describe the bug**
   Key_shared mode is configured as ConsistentHashingStickyKeyConsumerSelector, When I use three consumers with the same consumerName, if one consumer is closed, the other two consumers will no longer be able to consume messages.
   
   **To Reproduce**
   Steps to reproduce the behavior:
   1. config the 'conf/standalone.conf'
      ```
       subscriptionKeySharedUseConsistentHashing=true
      ```
   2. ./bin/pulsar standalone
   3. Start 3 consumers with the same cosumerName.
   ```
           PulsarClient client = PulsarClient.builder()
                   .serviceUrl("pulsar://localhost:6650")
                   .build();
   
           org.apache.pulsar.client.api.Consumer consumer = client.newConsumer()
                   .topic("my-topic")
                   .subscriptionName("my-subscription")
                   .consumerName("one")
                   .subscriptionType(SubscriptionType.Key_Shared)
                   .subscribe();
   ```
   4. Start a producer send messages.
   5. All 3 consumers can consume messages.
   6. Close one consumer, and the producer send messages again.
   7. **The other two consumers cannot consume new messages**
   
   **Expected behavior**
   The other two consumers can continue to consume new messages(Refer to step 7 above).
   
   
   **Additional context**
   https://github.com/apache/pulsar/blob/e19f6472183ac93dc058a96f7ac0537c22d90e18/pulsar-broker/src/main/java/org/apache/pulsar/broker/service/ConsistentHashingStickyKeyConsumerSelector.java#L93
   
   I think the problem is due to the above code, which removes all consumers with the same name.


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[GitHub] [pulsar] merlimat commented on issue #10750: Consumer cannot consume messages when key_shared mode and subscriptionKeySharedUseConsistentHashing

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

merlimat commented on issue #10750:
URL: https://github.com/apache/pulsar/issues/10750#issuecomment-1023412417


   @sourcelliu @lhotari
   
   > Perhaps this is related to #13965 ?
   
   No, it's not related to that (and #13965 is just a test issue, not a code issue).
   
   The consumer name is expected to be unique (eg: if you don't pass one, it will be auto-generated). 
   
   Having said that, the check here is wrong, as we should compare the consumer instance and not just the name.


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[GitHub] [pulsar] codelipenghui closed issue #10750: Consumer cannot consume messages when key_shared mode and subscriptionKeySharedUseConsistentHashing

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

codelipenghui closed issue #10750:
URL: https://github.com/apache/pulsar/issues/10750


   


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[GitHub] [pulsar] lhotari commented on issue #10750: Consumer cannot consume messages when key_shared mode and ConsistentHashingStickyKeyConsumerSelector

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

lhotari commented on issue #10750:
URL: https://github.com/apache/pulsar/issues/10750#issuecomment-1023083268


   Perhaps this is related to #13965 ?


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