dima5rr opened a new pull request #9020:
URL: https://github.com/apache/kafka/pull/9020


   StreamThreadStateStoreProvider excessive loop over calling 
internalTopologyBuilder.topicGroups(), which is synchronized, thus causing 
significant performance degradation to the caller, especially when store has 
many partitions.
   
   https://issues.apache.org/jira/browse/KAFKA-10271


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