Github user kayousterhout commented on the issue: https://github.com/apache/spark/pull/16639 Ok I'm convinced re: not walking up the cause tree. I didn't think about that finally case. I'll do another review now. Re: larger integration test, I didn't have a particular thing in mind -- I was mentioning that in response to your comment at it was hard to trigger the failure because of that first set of blocks that's fetched before any next() calls (so I was hoping you had some integration test in mind that would leverage that). But fine not to have one if it's still too complex to do.
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