ChuDucAnh242002 opened a new pull request, #24053:
URL: https://github.com/apache/kafka/pull/24053

   #### Proposed Changes ####
   
   Reduce Kafka Streams log noise by logging routine task idleness at DEBUG 
instead of INFO.
   
   #### Types of Changes ####
   
   Bugfix.
   
   #### Verification ####
   
   With idle input topics, verify that periodic not-ready diagnostics no longer 
appear at INFO but remain available at DEBUG.
   
   Verify that other waiting diagnostics continue to appear at INFO.
   
   #### Testing ####
   
   Added a parameterized unit test covering:
   - Waiting for new data within max.task.idle.ms.
   - No locally buffered records.
   
   #### Linked Issues ####
   
   [KAFKA-21407](https://issues.apache.org/jira/browse/KAFKA-21407)
   
   #### User-Facing Change ####
   
   ```release-note
   Kafka Streams now logs routine task-idleness diagnostics at DEBUG instead of 
INFO, reducing log noise for low-volume input topics. No user action is 
required.
   ```


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