Github user srowen commented on the issue:
https://github.com/apache/spark/pull/18522
I suspect that this doesn't hurt, because at the point you stop copying
input to a file, you are done with the input, and I don't think there is any
reason that the caller would ever continue reading it elsewhere. That said, the
process is already terminated correctly in this case, which closes the streams
too. I'm neutral on it unless this is theoretically solving a problem.
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