Github user JoshRosen commented on a diff in the pull request:
https://github.com/apache/spark/pull/6810#discussion_r33523492
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/execution/AggregateSuite.scala ---
@@ -0,0 +1,59 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.execution
+
+import org.apache.spark.sql.SQLConf
+import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.test.TestSQLContext
+import org.apache.spark.sql.types.DataTypes._
+
+class AggregateSuite extends SparkPlanTest {
+
+ test("SPARK-8357 Memory leakage on unsafe aggregation path with empty
input") {
+
+ val input0 = Seq.empty[(String, Int, Double)]
+ val input1 = Seq(("Hello", 4, 2.0))
+
+ // hack : current default parallelism of test local backend is two
+ val x0 = Seq(Tuple1(0L), Tuple1(0L))
+ val y0 = Seq.empty[Tuple1[Long]]
+
+ val x1 = Seq(Tuple1(0L), Tuple1(1L))
+ val y1 = Seq(Tuple1(1L))
+
+ val codegenDefault = TestSQLContext.getConf(SQLConf.CODEGEN_ENABLED)
+ try {
+ for ((input, x, y) <- Seq((input0, x0, y0), (input1, x1, y1))) {
+ val df = input.toDF("a", "b", "c")
+ val colB = df.col("b").expr
+ val colC = df.col("c").expr
+ val aggrExpr = Alias(Count(Cast(colC, LongType)), "Count")()
+
+ for ((codegen, unsafe) <- Seq((false, false), (true, false),
(true, true));
--- End diff --
AFAIK we only need to test the `(true, true)` case, since this bug only
occurred when using the unsafe aggregation path?
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