[GitHub] [kafka] flysen edited a comment on pull request #11454: KAFKA-13341: Quotas are not applied to requests with null clientId

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flysen edited a comment on pull request #11454:
URL: https://github.com/apache/kafka/pull/11454#issuecomment-963164070


   @dongjinleekr Ill follow up to this with our findings. Not 100% sure it's relevant. When `/config/clients/<default>` exist no new JMX metrics for `kafka.server:type=Produce,user=xx` will be populated, only `kafka.server:type=Request,client-id=producer-NNNN` 
   How to reproduce: 
   ```
   # Create a default clients quota 
   kafka-configs.sh --zookeeper zk-1.net --alter --entity-type clients --entity-default --add-config producer_byte_rate=1000
   # Confirm created
   kafka-configs.sh --zookeeper zk-1.net --describe --entity-type clients --entity-default
   --> Configs for default client-id are producer_byte_rate=1000
   # Check ZK
   ls /config/clients --> [<default>]
   get /config/clients/<default> --> {"version":1,"config":{"producer_byte_rate":"1000"}}
   # Delete default quota for client
   kafka-configs.sh --zookeeper zk-1.net --alter --entity-type clients --entity-default --delete-config producer_byte_rate
   # Confirm deleted
   kafka-configs.sh --zookeeper zk-1.net --describe --entity-type clients --entity-default
   --> Configs for default client-id are
   # Check ZK
   ls /config/clients --> [<default>]
   get /config/clients/<default> --> {"version":1,"config":{}}
   ```
   Now no sensors will be created for users until `/config/clients/<default>` is deleted
   ```
   delete /config/clients/<default>
   ```
   


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