Github user ConeyLiu commented on a diff in the pull request:
https://github.com/apache/spark/pull/19316#discussion_r143901552
--- Diff:
core/src/main/scala/org/apache/spark/storage/memory/MemoryStore.scala ---
@@ -388,7 +388,13 @@ private[spark] class MemoryStore(
// perform one final call to attempt to allocate additional memory if
necessary.
if (keepUnrolling) {
--- End diff --
We maybe need request the extra-memory (`bbos.size -
unrollMemoryUsedByThisBlock`). So the `keepUnrolling` maybe change in line 393.
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