srowen commented on PR #36403:
URL: https://github.com/apache/spark/pull/36403#issuecomment-1115056858

   SoftReference still allows it to be reclaimed on a full GC. If that helps, I 
think it's OK to change, as we do not expect many open iterators at any one 
time. Does that help the issue with finalize()? it still seems prudent to keep 
finalize() "just in case", unless it causes crashes


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