nileshkumar3 opened a new pull request, #21672:
URL: https://github.com/apache/kafka/pull/21672

   Root Cause
   The AddPartitionsToTxn handler may repeatedly re-enqueue itself on
   retriable errors without any client-side timeout bounding the retry loop.
   If the topic is deleted during this phase, the client may never make
   progress and producer.flush() may block indefinitely.
   
   Fix
   Track the first retriable error timestamp and fail the request if
   retries exceed transaction.timeout.ms.


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