JoshRosen edited a comment on issue #25953: [SPARK-29244][Core] Prevent freed page in BytesToBytesMap free again URL: https://github.com/apache/spark/pull/25953#issuecomment-536259314 Maybe we could simulate that case with a mock `MemoryManager` which OOMs on all allocation requests after the ones in the constructor / initialization? I'm not sure how hard this is, though, or whether there's prior art here.
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