Github user jerryshao commented on the pull request:
https://github.com/apache/spark/pull/557#issuecomment-48683925
Yes, I did revisit this patch again long ago, but as you mentioned it is so
flaky. I guess the main reason is that our Kafka API call is in high level
which involves Zookeeper's behavior (unknown latency or others), so our unit
test cannot precisely reproduce the result each time. I think if we shift to
some low level API, we can have more power to control the behavior, this
problem can be easily fixed.
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