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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