Github user mccheah commented on the pull request: https://github.com/apache/spark/pull/4420#issuecomment-74827293 If every single object is large though, then in that case after we've spilled the 32nd object, there would still be an OOM before we check for spilling again, right? I don't know if there's a completely OOM-proof solution aside from checking for spilling on every single element though.
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