cloud-fan commented on issue #26471: [SPARK-29850][SQL] sort-merge-join an empty table should not memory leak URL: https://github.com/apache/spark/pull/26471#issuecomment-552486602 note that, this is not a serious problem. The memory manager always releases all the allocated memory at the end of a task. Spark throws exception only in test when the memory is not released manually before task end. cc @viirya @maryannxue
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