PatrickRen commented on PR #19828:
URL: https://github.com/apache/flink/pull/19828#issuecomment-1154652936

   Thanks for the review @zou-can ! Initially I was trying to fix this case 
from the root that `KafkaPartitionSplitReader#wakeup` should only wake up the 
blocking `KafkaConsumer#poll` invocation, but I realized that it's not possible 
to do so because Kafka consumer doesn't expose such an API. I have updated my 
code to add a wrapper on Kafka consumer calls that catch `WakeupException` and 
retry on exception.


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