fix

Author: maryannxue

sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/EliminateResolvedHint.scala

@@ -34,7 +34,7 @@ object EliminateResolvedHint extends Rule[LogicalPlan] {
         val rightHint = mergeHints(collectHints(j.right))
         j.copy(hint = JoinHint(leftHint, rightHint))
     }
-    pulledUp.transform {
+    pulledUp.transformUp {
       case h: ResolvedHint => h.child
     }
   }

sql/core/src/test/scala/org/apache/spark/sql/JoinHintSuite.scala

@@ -190,4 +190,13 @@ class JoinHintSuite extends PlanTest with SharedSQLContext {
         Some(HintInfo(broadcast = true))) :: Nil
     )
   }
+
+  test("nested hint") {
+    verifyJoinHint(
+      df.hint("broadcast").hint("broadcast").filter('id > 2).join(df, "id"),
+      JoinHint(
+        Some(HintInfo(broadcast = true)),
+        None) :: Nil
+    )
+  }
 }