dalelane opened a new pull request, #308:
URL: https://github.com/apache/flink-connector-kafka/pull/308

   SourceTopicIntegrityTest.testTopicIntegritySuccess has been intermittently 
failing in CI workflows, reporting that it has got more records than it was 
expecting.
   
   The test now runs each subscription mode twice — once with the sink set to 
at-least-once delivery and once to exactly-once where previously it only ever 
ran at-least-once.
   
   In the at-least-once runs it checks that no records were lost rather than 
insisting on an exact count, so a harmless retry that writes a record twice no 
longer fails the test.
   
   In the exactly-once runs still hold the sink to an exact count because that 
mode promises no duplicates.


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