Github user chenghao-intel commented on a diff in the pull request:
https://github.com/apache/spark/pull/3375#discussion_r21575519
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashOuterJoin.scala
---
@@ -68,62 +68,59 @@ case class HashOuterJoin(
@transient private[this] lazy val DUMMY_LIST = Seq[Row](null)
@transient private[this] lazy val EMPTY_LIST = Seq.empty[Row]
+ @transient private[this] lazy val joinedRow = new JoinedRow()
--- End diff --
Yes, we'd better to keep the `joinedRow` object created once for a single
task, the MOVE I suggested should work for this purpose.
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