MAPREDUCE-5670. CombineFileRecordReader should report progress when moving to the next file. Contributed by Chen He

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1568118 13f79535-47bb-0310-9956-ffa450edef68

hadoop-mapreduce-project/CHANGES.txt

@@ -162,6 +162,9 @@ Release 2.4.0 - UNRELEASED
     MAPREDUCE-5746. Job diagnostics can implicate wrong task for a failed job.
     (Jason Lowe via kasha)
 
+    MAPREDUCE-5670. CombineFileRecordReader should report progress when moving
+    to the next file (Chen He via jlowe)
+
 Release 2.3.1 - UNRELEASED
 
   INCOMPATIBLE CHANGES

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapred/lib/CombineFileRecordReader.java

@@ -140,6 +140,8 @@ protected boolean initNextRecordReader() throws IOException {
       return false;
     }
 
+    reporter.progress();
+
     // get a record reader for the idx-th chunk
     try {
       curReader =  rrConstructor.newInstance(new Object [] 

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/input/CombineFileRecordReader.java

@@ -54,7 +54,7 @@ public class CombineFileRecordReader<K, V> extends RecordReader<K, V> {
   protected int idx;
   protected long progress;
   protected RecordReader<K, V> curReader;
-  
+
   public void initialize(InputSplit split,
       TaskAttemptContext context) throws IOException, InterruptedException {
     this.split = (CombineFileSplit)split;
@@ -144,6 +144,8 @@ protected boolean initNextRecordReader() throws IOException {
       return false;
     }
 
+    context.progress();
+
     // get a record reader for the idx-th chunk
     try {
       Configuration conf = context.getConfiguration();

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/test/java/org/apache/hadoop/mapred/lib/TestCombineFileRecordReader.java

@@ -0,0 +1,88 @@
+/**
+ * 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.hadoop.mapred.lib;
+
+import java.io.File;
+import java.io.FileWriter;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.io.LongWritable;
+import org.apache.hadoop.io.Text;
+import org.apache.hadoop.mapred.Reporter;
+import org.apache.hadoop.mapred.JobConf;
+import org.apache.hadoop.mapred.TextInputFormat;
+import org.apache.hadoop.fs.FileUtil;
+
+import org.junit.Test;
+import org.mockito.Mockito;
+import org.junit.Assert;
+
+import java.io.IOException;
+
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+
+public class TestCombineFileRecordReader {
+
+  private static Path outDir = new Path(System.getProperty("test.build.data",
+            "/tmp"), TestCombineFileRecordReader.class.getName());
+
+  private static class TextRecordReaderWrapper
+    extends org.apache.hadoop.mapred.lib.CombineFileRecordReaderWrapper<LongWritable,Text> {
+    // this constructor signature is required by CombineFileRecordReader
+    public TextRecordReaderWrapper(CombineFileSplit split, Configuration conf,
+      Reporter reporter, Integer idx) throws IOException {
+      super(new TextInputFormat(), split, conf, reporter, idx);
+    }
+  }
+
+  @SuppressWarnings("unchecked")
+  @Test
+  public void testInitNextRecordReader() throws IOException{
+    JobConf conf = new JobConf();
+    Path[] paths = new Path[3];
+    long[] fileLength = new long[3];
+    File[] files = new File[3];
+    LongWritable key = new LongWritable(1);
+    Text value = new Text();
+    try {
+      for(int i=0;i<3;i++){
+        fileLength[i] = i;
+        File dir = new File(outDir.toString());
+        dir.mkdir();
+        files[i] = new File(dir,"testfile"+i);
+        FileWriter fileWriter = new FileWriter(files[i]);
+        fileWriter.close();
+        paths[i] = new Path(outDir+"/testfile"+i);
+      }
+      CombineFileSplit combineFileSplit = new CombineFileSplit(conf, paths, fileLength);
+      Reporter reporter = Mockito.mock(Reporter.class);
+      CombineFileRecordReader cfrr = new CombineFileRecordReader(conf, combineFileSplit,
+        reporter,  TextRecordReaderWrapper.class);
+      verify(reporter).progress();
+      Assert.assertFalse(cfrr.next(key,value));
+      verify(reporter, times(3)).progress();
+    } finally {
+      FileUtil.fullyDelete(new File(outDir.toString()));
+    }
+
+  }
+}
+

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/test/java/org/apache/hadoop/mapreduce/lib/input/TestCombineFileRecordReader.java

@@ -0,0 +1,96 @@
+/**
+ * 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.hadoop.mapreduce.lib.input;
+
+import java.io.FileWriter;
+import java.io.IOException;
+import java.io.File;
+
+import junit.framework.Assert;
+import org.apache.hadoop.fs.FileUtil;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.io.LongWritable;
+import org.apache.hadoop.io.Text;
+import org.apache.hadoop.mapred.JobConf;
+import org.apache.hadoop.mapreduce.TaskAttemptContext;
+import org.apache.hadoop.mapreduce.task.TaskAttemptContextImpl;
+import org.apache.hadoop.mapreduce.TaskAttemptID;
+import org.apache.hadoop.mapred.Task.TaskReporter;
+
+import org.mockito.Mockito;
+
+import org.junit.Test;
+
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+
+public class TestCombineFileRecordReader {
+
+  private static Path outDir = new Path(System.getProperty("test.build.data",
+            "/tmp"), TestCombineFileRecordReader.class.getName());
+  private static class TextRecordReaderWrapper
+    extends CombineFileRecordReaderWrapper<LongWritable,Text> {
+    // this constructor signature is required by CombineFileRecordReader
+    public TextRecordReaderWrapper(org.apache.hadoop.mapreduce.lib.input.CombineFileSplit split,
+      TaskAttemptContext context, Integer idx)
+        throws IOException, InterruptedException {
+      super(new TextInputFormat(), split, context, idx);
+    }
+  }
+
+  @SuppressWarnings("unchecked")
+  @Test
+  public void testProgressIsReportedIfInputASeriesOfEmptyFiles() throws IOException, InterruptedException {
+    JobConf conf = new JobConf();
+    Path[] paths = new Path[3];
+    File[] files = new File[3];
+    long[] fileLength = new long[3];
+
+    try {
+      for(int i=0;i<3;i++){
+        File dir = new File(outDir.toString());
+        dir.mkdir();
+        files[i] = new File(dir,"testfile"+i);
+        FileWriter fileWriter = new FileWriter(files[i]);
+        fileWriter.flush();
+        fileWriter.close();
+        fileLength[i] = i;
+        paths[i] = new Path(outDir+"/testfile"+i);
+      }
+
+      CombineFileSplit combineFileSplit = new CombineFileSplit(paths, fileLength);
+      TaskAttemptID taskAttemptID = Mockito.mock(TaskAttemptID.class);
+      TaskReporter reporter = Mockito.mock(TaskReporter.class);
+      TaskAttemptContextImpl taskAttemptContext =
+        new TaskAttemptContextImpl(conf, taskAttemptID,reporter);
+
+      CombineFileRecordReader cfrr = new CombineFileRecordReader(combineFileSplit,
+        taskAttemptContext, TextRecordReaderWrapper.class);
+
+      cfrr.initialize(combineFileSplit,taskAttemptContext);
+
+      verify(reporter).progress();
+      Assert.assertFalse(cfrr.nextKeyValue());
+      verify(reporter, times(3)).progress();
+    } finally {
+      FileUtil.fullyDelete(new File(outDir.toString()));
+    }
+  }
+}
+