AndrewJSchofield commented on PR #19610:
URL: https://github.com/apache/kafka/pull/19610#issuecomment-2844803489

   Here's a sample of the output before the change:
   
   Success:
   ```
   bin/kafka-consumer-groups.sh --bootstrap-server localhost:9092 
--delete-offsets --group group1 --topic T1
   Request succeed for deleting offsets with topic T1 group group1
   
   TOPIC                          PARTITION       STATUS         
   T1                             0               Successful
   ```
   
   and a failure:
   
   ```
   bin/kafka-consumer-groups.sh --bootstrap-server localhost:9092 
--delete-offsets --group group3 --topic T1
   
   Error: 'group3' does not exist.
   
   TOPIC                          PARTITION       STATUS         
   T1                             0               Error: 
org.apache.kafka.common.errors.GroupIdNotFoundException: The group id does not 
exist.
   ```
   
   Here are some output examples after the change.
   
   Successful deletion:
   ```
   bin/kafka-consumer-groups.sh --bootstrap-server localhost:9092 
--delete-offsets --group group1 --topic T1
   Request succeeded for deleting offsets from group group1 with topic T1.
   
   TOPIC           PARTITION  STATUS         
   T1              0          Successful
   ```
   
   Deletion failed because T1 is subscribed:
   ```
   bin/kafka-consumer-groups.sh --bootstrap-server localhost:9092 
--delete-offsets --group group1 --topic T1
   
   Error: Encountered some partition-level error, see the follow-up details:
   
   TOPIC           PARTITION  STATUS         
   T1              0          Error: 
org.apache.kafka.common.errors.GroupSubscribedToTopicException: Deleting 
offsets of a topic is forbidden while the consumer group is actively subscribed 
to it.
   ```
   
   Unknown group ID:
   ```
   bin/kafka-consumer-groups.sh --bootstrap-server localhost:9092 
--delete-offsets --group group3 --topic T1                  
   
   Error: The group id does not exist.
   
   TOPIC           PARTITION  STATUS         
   T1              0          Error: 
org.apache.kafka.common.errors.GroupIdNotFoundException: The group id does not 
exist.
   ```


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