Github user uncleGen commented on the issue:
https://github.com/apache/spark/pull/15915
@srowen The truth is that `chunk size` is passed from different code path
with different value. There is not a reasonable value when `chunk size` as a
invalid value. Experiencedly, `chunk size` does not need a large value,
although it can be. Besides, we can give it a special config, and restrict it a
reasonable value, like not larger than 16MB or something else. But you said no
to add new config.
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