Github user caneGuy commented on a diff in the pull request:
https://github.com/apache/spark/pull/20292#discussion_r163160055
--- Diff:
core/src/main/scala/org/apache/spark/util/collection/ExternalAppendOnlyMap.scala
---
@@ -463,21 +463,21 @@ class ExternalAppendOnlyMap[K, V, C](
// An intermediate stream that reads from exactly one batch
// This guards against pre-fetching and other arbitrary behavior of
higher level streams
- private var deserializeStream = nextBatchStream()
+ private var deserializeStream: Option[DeserializationStream] = None
--- End diff --
Ok,i will fix later @jiangxb1987 @cloud-fan Thanks for your precious time
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