Github user JoshRosen commented on the issue:
https://github.com/apache/spark/pull/21311
@cxzl25, to clarify:
> Some data is lost and the data read out is dirty
To clarify, is this a potential cause of a wrong-answer correctness bug? If
so, we should be sure to backport the resulting fix to maintenance branches.
/cc @cloud-fan @gatorsmile
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