Github user aarondav commented on a diff in the pull request:
https://github.com/apache/spark/pull/3142#discussion_r19965000
--- Diff:
core/src/main/scala/org/apache/spark/storage/ShuffleBlockFetcherIterator.scala
---
@@ -92,7 +92,7 @@ final class ShuffleBlockFetcherIterator(
* Current [[FetchResult]] being processed. We track this so we can
release the current buffer
* in case of a runtime exception when processing the current buffer.
*/
- private[this] var currentResult: FetchResult = null
+ @volatile private[this] var currentResult: FetchResult = null
--- End diff --
This was supposed to go into #3128 as we check this nullness of this
parameter in multiple threads.
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