Github user yhuai commented on a diff in the pull request:
https://github.com/apache/spark/pull/12527#discussion_r60456008
--- Diff:
sql/hive/src/test/scala/org/apache/spark/sql/sources/BucketedReadSuite.scala ---
@@ -301,8 +301,12 @@ class BucketedReadSuite extends QueryTest with
SQLTestUtils with TestHiveSinglet
}
test("only shuffle one side when 2 bucketed tables have different bucket
keys") {
- val bucketSpec1 = Some(BucketSpec(8, Seq("i"), Nil))
- val bucketSpec2 = Some(BucketSpec(8, Seq("j"), Nil))
+ // !! ALERT !!
+ //
+ // Setting `numBuckets` of the following two `BucketSpec` to 8 causes
a deadlock in DAGScheduler
+ // due to unknown reasons. Need investigation.
--- End diff --
Maybe it exposes a bug in somewhere. Let's look at it together.
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