123123213weqw opened a new pull request, #10918:
URL: https://github.com/apache/rocketmq/pull/10918

   ## What is the purpose of the change
   
   Fix #10895.
   
   ClientProcessor.validateLiteSubTopic validated only 
subList.iterator().next(), so a Lite consumer group could include a 
subscription for a different topic as long as the first set element matched the 
bound topic.
   
   ## Brief changelog
   
   - ClientProcessor: validateLiteSubTopic now checks every subscription in the 
set against the configured bound topic and rejects any mismatch with 
ILLEGAL_TOPIC
   
   ## How was this patch verified
   
   - Code review: each SubscriptionData.topic is passed through 
validateLiteBindTopic
   - `git diff --check` clean
   


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