Github user tianyi commented on a diff in the pull request:
https://github.com/apache/spark/pull/3375#discussion_r21538764
--- 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 --
Thanks, @chenghao-intel I will try this way tomorrow. My concerns is about
the memory costs. I think we should use memory as fewer as possible to reduce
the possibility of OOM occurs.
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