Github user jiangxb1987 commented on a diff in the pull request:
https://github.com/apache/spark/pull/21390#discussion_r190098764
--- Diff:
common/network-shuffle/src/test/java/org/apache/spark/network/shuffle/NonShuffleFilesCleanupSuite.java
---
@@ -0,0 +1,222 @@
+/*
+ * 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.network.shuffle;
+
+import java.io.File;
+import java.io.FilenameFilter;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.util.Random;
+import java.util.concurrent.Executor;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+import com.google.common.util.concurrent.MoreExecutors;
+import org.junit.Test;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import org.apache.spark.network.util.MapConfigProvider;
+import org.apache.spark.network.util.TransportConf;
+
+public class NonShuffleFilesCleanupSuite {
--- End diff --
Thanks for the suggestion, Let me try it later. :)
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