Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/21772#discussion_r204276886
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashedRelation.scala
---
@@ -770,8 +771,10 @@ private[execution] final class LongToUnsafeRowMap(val
mm: TaskMemoryManager, cap
val length = readLong().toInt
mask = length - 2
array = readLongArray(readBuffer, length)
- val pageLength = readLong().toInt
- page = readLongArray(readBuffer, pageLength)
+ val usedWordsNumber = readLong().toInt
+ // Set cursor because cursor is used in write function.
+ cursor = usedWordsNumber * 8 + Platform.LONG_ARRAY_OFFSET
+ page = readLongArray(readBuffer, usedWordsNumber)
--- End diff --
ditto. Can you just update `cursor` and revert other unrelated change?
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