Caideyipi opened a new pull request, #17928:
URL: https://github.com/apache/iotdb/pull/17928

   ## Summary
   - add per-receiver endpoint backoff in the async data region pipe sink when 
the receiver reports temporary unavailable/write reject
   - record receiver status in the common async transfer handler and wait 
before subsequent sends to the same endpoint
   - cover the common handler behavior with a focused unit test
   
   ## Tests
   - mvn "-Ddevelocity.off=true" spotless:apply -pl iotdb-core/datanode
   - git diff --check
   - mvn "-Ddevelocity.off=true" -pl iotdb-core/datanode 
"-Dtest=PipeTransferTrackableHandlerTest" test (fails during existing datanode 
compile errors unrelated to this change, e.g. missing PipePeriodicalLogReducer, 
parser identifier(), CalcMessages fields)
   


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