Github user davies commented on a diff in the pull request: https://github.com/apache/spark/pull/11794#discussion_r56690412 --- Diff: core/src/main/java/org/apache/spark/shuffle/sort/ShuffleExternalSorter.java --- @@ -320,7 +320,15 @@ private void growPointerArrayIfNecessary() throws IOException { assert(inMemSorter != null); if (!inMemSorter.hasSpaceForAnotherRecord()) { long used = inMemSorter.getMemoryUsage(); - LongArray array = allocateArray(used / 8 * 2); + LongArray array; + try { + // could trigger spilling + array = allocateArray(used / 8 * 2); + } catch (OutOfMemoryError e) { + // should have trigger spilling + assert(inMemSorter.hasSpaceForAnotherRecord()); --- End diff -- Could you change this to `require` and add a error message?
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