Github user JoshRosen commented on a diff in the pull request: https://github.com/apache/spark/pull/9127#discussion_r42895096 --- Diff: core/src/main/scala/org/apache/spark/util/collection/ExternalAppendOnlyMap.scala --- @@ -49,18 +48,25 @@ import org.apache.spark.executor.ShuffleWriteMetrics * writes. This may lead to a performance regression compared to the normal case of using the * non-spilling AppendOnlyMap. */ -@DeveloperApi --- End diff -- Yeah. The issue is that Spillable now requires a TaskMemoryManager, which won't be available on the driver. I'm pretty sure that this class was never intended to be DeveloperAPI'd. If you feel strongly that we shouldn't break this, I can add a compatibility test.
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