Github user JoshRosen commented on the issue:
https://github.com/apache/spark/pull/15915
To clarify, does this overflow only occur when
`spark.storage.unrollMemoryThreshold` has been manually set to a huge value
which doesn't fit into an int?
Setting the chunk size to `Integer.MAX_VALUE` probably isn't a good idea
because it'll leave us OOM-prone. Instead, we should probably set some
reasonable upper bound on the chunk size based on either the unsafe page size
or something else.
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