Github user xubo245 commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/2850#discussion_r228706276
--- Diff:
store/sdk/src/test/java/org/apache/carbondata/sdk/file/ConcurrentSdkReaderTest.java
---
@@ -0,0 +1,155 @@
+/*
+ * 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.carbondata.sdk.file;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.Callable;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+
+import org.apache.carbondata.core.metadata.datatype.DataTypes;
+
+import junit.framework.TestCase;
+import org.apache.commons.io.FileUtils;
+import org.apache.commons.io.IOExceptionWithCause;
+import org.junit.*;
+
+/**
+ * multi-thread Test suite for {@link CarbonReader}
+ */
+public class ConcurrentSdkReaderTest extends TestCase {
+
+ private static final String dataDir = "./testReadFiles";
+
+ public void cleanTestData() {
--- End diff --
you can add @Before or @After got it. especially there are many test case
---
