BewareMyPower commented on PR #21889:
URL: https://github.com/apache/pulsar/pull/21889#issuecomment-1893023636

   @nodece It's not hard to reproduce. The open sourced KoP can also reproduce 
this issue.
   
   1. Run a KoP standalone
   2. Run a Kafka consumer via CLI (`./bin/kafka-console-consumer.sh 
--bootstrap-server localhost:9092 --topic my-topic --group my-group`)
   3. Just wait. If it is not reproduced after some time, try unloading the 
`public/__kafka` namespace and wait. (`./bin/pulsar-admin namespaces unload 
public/__kafka`)
   
   I reproduced again just now.
   
   ```
   2024-01-16T11:33:12,414+0800 [pulsar-web-49-19] INFO  
org.apache.pulsar.broker.admin.impl.NamespacesBase - [null] Unloading namespace 
public/__kafka
   ```
   
   ```
   [2024-01-16 11:33:50,344] WARN [Consumer clientId=console-consumer, 
groupId=my-group] Offset commit failed on partition my-topic-0 at offset 0: The 
request timed out. 
(org.apache.kafka.clients.consumer.internals.ConsumerCoordinator)
   ```
   
   After about 40 seconds since unloading, the timeout error occurred.


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