| /** |
| * 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; |
| |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.IOException; |
| import java.net.URI; |
| |
| import junit.framework.TestCase; |
| |
| import org.apache.hadoop.fs.FileStatus; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.FileUtil; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.fs.RawLocalFileSystem; |
| import org.apache.hadoop.io.LongWritable; |
| import org.apache.hadoop.io.MapFile; |
| import org.apache.hadoop.io.NullWritable; |
| import org.apache.hadoop.io.Text; |
| |
| |
| @SuppressWarnings("unchecked") |
| public class TestFileOutputCommitter extends TestCase { |
| private static Path outDir = new Path(System.getProperty("test.build.data", |
| "/tmp"), "output"); |
| |
| // A random task attempt id for testing. |
| private static String attempt = "attempt_200707121733_0001_m_000000_0"; |
| private static String partFile = "part-00000"; |
| private static TaskAttemptID taskID = TaskAttemptID.forName(attempt); |
| private Text key1 = new Text("key1"); |
| private Text key2 = new Text("key2"); |
| private Text val1 = new Text("val1"); |
| private Text val2 = new Text("val2"); |
| |
| |
| private void writeOutput(RecordWriter theRecordWriter, |
| TaskAttemptContext context) throws IOException, InterruptedException { |
| NullWritable nullWritable = NullWritable.get(); |
| |
| try { |
| theRecordWriter.write(key1, val1); |
| theRecordWriter.write(null, nullWritable); |
| theRecordWriter.write(null, val1); |
| theRecordWriter.write(nullWritable, val2); |
| theRecordWriter.write(key2, nullWritable); |
| theRecordWriter.write(key1, null); |
| theRecordWriter.write(null, null); |
| theRecordWriter.write(key2, val2); |
| } finally { |
| theRecordWriter.close(null); |
| } |
| } |
| |
| private void writeMapFileOutput(RecordWriter theRecordWriter, |
| TaskAttemptContext context) throws IOException, InterruptedException { |
| try { |
| int key = 0; |
| for (int i = 0 ; i < 10; ++i) { |
| key = i; |
| Text val = (i%2 == 1) ? val1 : val2; |
| theRecordWriter.write(new LongWritable(key), |
| val); |
| } |
| } finally { |
| theRecordWriter.close(null); |
| } |
| } |
| |
| public void testRecovery() throws Exception { |
| JobConf conf = new JobConf(); |
| FileOutputFormat.setOutputPath(conf, outDir); |
| conf.set(JobContext.TASK_ATTEMPT_ID, attempt); |
| conf.setInt(MRConstants.APPLICATION_ATTEMPT_ID, 1); |
| JobContext jContext = new JobContextImpl(conf, taskID.getJobID()); |
| TaskAttemptContext tContext = new TaskAttemptContextImpl(conf, taskID); |
| FileOutputCommitter committer = new FileOutputCommitter(); |
| |
| // setup |
| committer.setupJob(jContext); |
| committer.setupTask(tContext); |
| |
| // write output |
| TextOutputFormat theOutputFormat = new TextOutputFormat(); |
| RecordWriter theRecordWriter = |
| theOutputFormat.getRecordWriter(null, conf, partFile, null); |
| writeOutput(theRecordWriter, tContext); |
| |
| // do commit |
| if(committer.needsTaskCommit(tContext)) { |
| committer.commitTask(tContext); |
| } |
| Path jobTempDir1 = committer.getCommittedTaskPath(tContext); |
| File jtd1 = new File(jobTempDir1.toUri().getPath()); |
| assertTrue(jtd1.exists()); |
| validateContent(jobTempDir1); |
| |
| //now while running the second app attempt, |
| //recover the task output from first attempt |
| JobConf conf2 = new JobConf(conf); |
| conf2.set(JobContext.TASK_ATTEMPT_ID, attempt); |
| conf2.setInt(MRConstants.APPLICATION_ATTEMPT_ID, 2); |
| JobContext jContext2 = new JobContextImpl(conf2, taskID.getJobID()); |
| TaskAttemptContext tContext2 = new TaskAttemptContextImpl(conf2, taskID); |
| FileOutputCommitter committer2 = new FileOutputCommitter(); |
| committer2.setupJob(jContext2); |
| Path jobTempDir2 = committer2.getCommittedTaskPath(tContext2); |
| |
| committer2.recoverTask(tContext2); |
| File jtd2 = new File(jobTempDir2.toUri().getPath()); |
| assertTrue(jtd2.exists()); |
| validateContent(jobTempDir2); |
| |
| committer2.commitJob(jContext2); |
| validateContent(outDir); |
| FileUtil.fullyDelete(new File(outDir.toString())); |
| } |
| |
| private void validateContent(Path dir) throws IOException { |
| File fdir = new File(dir.toUri().getPath()); |
| File expectedFile = new File(fdir, partFile); |
| StringBuffer expectedOutput = new StringBuffer(); |
| expectedOutput.append(key1).append('\t').append(val1).append("\n"); |
| expectedOutput.append(val1).append("\n"); |
| expectedOutput.append(val2).append("\n"); |
| expectedOutput.append(key2).append("\n"); |
| expectedOutput.append(key1).append("\n"); |
| expectedOutput.append(key2).append('\t').append(val2).append("\n"); |
| String output = slurp(expectedFile); |
| assertEquals(output, expectedOutput.toString()); |
| } |
| |
| private void validateMapFileOutputContent( |
| FileSystem fs, Path dir) throws IOException { |
| // map output is a directory with index and data files |
| Path expectedMapDir = new Path(dir, partFile); |
| assert(fs.getFileStatus(expectedMapDir).isDirectory()); |
| FileStatus[] files = fs.listStatus(expectedMapDir); |
| int fileCount = 0; |
| boolean dataFileFound = false; |
| boolean indexFileFound = false; |
| for (FileStatus f : files) { |
| if (f.isFile()) { |
| ++fileCount; |
| if (f.getPath().getName().equals(MapFile.INDEX_FILE_NAME)) { |
| indexFileFound = true; |
| } |
| else if (f.getPath().getName().equals(MapFile.DATA_FILE_NAME)) { |
| dataFileFound = true; |
| } |
| } |
| } |
| assert(fileCount > 0); |
| assert(dataFileFound && indexFileFound); |
| } |
| |
| public void testCommitter() throws Exception { |
| JobConf conf = new JobConf(); |
| FileOutputFormat.setOutputPath(conf, outDir); |
| conf.set(JobContext.TASK_ATTEMPT_ID, attempt); |
| JobContext jContext = new JobContextImpl(conf, taskID.getJobID()); |
| TaskAttemptContext tContext = new TaskAttemptContextImpl(conf, taskID); |
| FileOutputCommitter committer = new FileOutputCommitter(); |
| |
| // setup |
| committer.setupJob(jContext); |
| committer.setupTask(tContext); |
| |
| // write output |
| TextOutputFormat theOutputFormat = new TextOutputFormat(); |
| RecordWriter theRecordWriter = |
| theOutputFormat.getRecordWriter(null, conf, partFile, null); |
| writeOutput(theRecordWriter, tContext); |
| |
| // do commit |
| if(committer.needsTaskCommit(tContext)) { |
| committer.commitTask(tContext); |
| } |
| committer.commitJob(jContext); |
| |
| // validate output |
| validateContent(outDir); |
| FileUtil.fullyDelete(new File(outDir.toString())); |
| } |
| |
| public void testMapFileOutputCommitter() throws Exception { |
| JobConf conf = new JobConf(); |
| FileOutputFormat.setOutputPath(conf, outDir); |
| conf.set(JobContext.TASK_ATTEMPT_ID, attempt); |
| JobContext jContext = new JobContextImpl(conf, taskID.getJobID()); |
| TaskAttemptContext tContext = new TaskAttemptContextImpl(conf, taskID); |
| FileOutputCommitter committer = new FileOutputCommitter(); |
| |
| // setup |
| committer.setupJob(jContext); |
| committer.setupTask(tContext); |
| |
| // write output |
| MapFileOutputFormat theOutputFormat = new MapFileOutputFormat(); |
| RecordWriter theRecordWriter = theOutputFormat.getRecordWriter(null, conf, partFile, null); |
| writeMapFileOutput(theRecordWriter, tContext); |
| |
| // do commit |
| if(committer.needsTaskCommit(tContext)) { |
| committer.commitTask(tContext); |
| } |
| committer.commitJob(jContext); |
| |
| // validate output |
| validateMapFileOutputContent(FileSystem.get(conf), outDir); |
| FileUtil.fullyDelete(new File(outDir.toString())); |
| } |
| |
| public void testMapOnlyNoOutput() throws Exception { |
| JobConf conf = new JobConf(); |
| //This is not set on purpose. FileOutputFormat.setOutputPath(conf, outDir); |
| conf.set(JobContext.TASK_ATTEMPT_ID, attempt); |
| JobContext jContext = new JobContextImpl(conf, taskID.getJobID()); |
| TaskAttemptContext tContext = new TaskAttemptContextImpl(conf, taskID); |
| FileOutputCommitter committer = new FileOutputCommitter(); |
| |
| // setup |
| committer.setupJob(jContext); |
| committer.setupTask(tContext); |
| |
| if(committer.needsTaskCommit(tContext)) { |
| // do commit |
| committer.commitTask(tContext); |
| } |
| committer.commitJob(jContext); |
| |
| // validate output |
| FileUtil.fullyDelete(new File(outDir.toString())); |
| } |
| |
| public void testAbort() throws IOException, InterruptedException { |
| JobConf conf = new JobConf(); |
| FileOutputFormat.setOutputPath(conf, outDir); |
| conf.set(JobContext.TASK_ATTEMPT_ID, attempt); |
| JobContext jContext = new JobContextImpl(conf, taskID.getJobID()); |
| TaskAttemptContext tContext = new TaskAttemptContextImpl(conf, taskID); |
| FileOutputCommitter committer = new FileOutputCommitter(); |
| |
| // do setup |
| committer.setupJob(jContext); |
| committer.setupTask(tContext); |
| |
| // write output |
| TextOutputFormat theOutputFormat = new TextOutputFormat(); |
| RecordWriter theRecordWriter = |
| theOutputFormat.getRecordWriter(null, conf, partFile, null); |
| writeOutput(theRecordWriter, tContext); |
| |
| // do abort |
| committer.abortTask(tContext); |
| File out = new File(outDir.toUri().getPath()); |
| Path workPath = committer.getWorkPath(tContext, outDir); |
| File wp = new File(workPath.toUri().getPath()); |
| File expectedFile = new File(wp, partFile); |
| assertFalse("task temp dir still exists", expectedFile.exists()); |
| |
| committer.abortJob(jContext, JobStatus.State.FAILED); |
| expectedFile = new File(out, FileOutputCommitter.TEMP_DIR_NAME); |
| assertFalse("job temp dir still exists", expectedFile.exists()); |
| assertEquals("Output directory not empty", 0, out.listFiles().length); |
| FileUtil.fullyDelete(out); |
| } |
| |
| public static class FakeFileSystem extends RawLocalFileSystem { |
| public FakeFileSystem() { |
| super(); |
| } |
| |
| public URI getUri() { |
| return URI.create("faildel:///"); |
| } |
| |
| @Override |
| public boolean delete(Path p, boolean recursive) throws IOException { |
| throw new IOException("fake delete failed"); |
| } |
| } |
| |
| |
| public void testFailAbort() throws IOException, InterruptedException { |
| JobConf conf = new JobConf(); |
| conf.set(FileSystem.FS_DEFAULT_NAME_KEY, "faildel:///"); |
| conf.setClass("fs.faildel.impl", FakeFileSystem.class, FileSystem.class); |
| conf.set(JobContext.TASK_ATTEMPT_ID, attempt); |
| conf.setInt(MRConstants.APPLICATION_ATTEMPT_ID, 1); |
| FileOutputFormat.setOutputPath(conf, outDir); |
| JobContext jContext = new JobContextImpl(conf, taskID.getJobID()); |
| TaskAttemptContext tContext = new TaskAttemptContextImpl(conf, taskID); |
| FileOutputCommitter committer = new FileOutputCommitter(); |
| |
| // do setup |
| committer.setupJob(jContext); |
| committer.setupTask(tContext); |
| |
| // write output |
| File jobTmpDir = new File(new Path(outDir, |
| FileOutputCommitter.TEMP_DIR_NAME + Path.SEPARATOR + |
| conf.getInt(MRConstants.APPLICATION_ATTEMPT_ID, 0) + |
| Path.SEPARATOR + |
| FileOutputCommitter.TEMP_DIR_NAME).toString()); |
| File taskTmpDir = new File(jobTmpDir, "_" + taskID); |
| File expectedFile = new File(taskTmpDir, partFile); |
| TextOutputFormat<?, ?> theOutputFormat = new TextOutputFormat(); |
| RecordWriter<?, ?> theRecordWriter = |
| theOutputFormat.getRecordWriter(null, conf, |
| expectedFile.getAbsolutePath(), null); |
| writeOutput(theRecordWriter, tContext); |
| |
| // do abort |
| Throwable th = null; |
| try { |
| committer.abortTask(tContext); |
| } catch (IOException ie) { |
| th = ie; |
| } |
| assertNotNull(th); |
| assertTrue(th instanceof IOException); |
| assertTrue(th.getMessage().contains("fake delete failed")); |
| assertTrue(expectedFile + " does not exists", expectedFile.exists()); |
| |
| th = null; |
| try { |
| committer.abortJob(jContext, JobStatus.State.FAILED); |
| } catch (IOException ie) { |
| th = ie; |
| } |
| assertNotNull(th); |
| assertTrue(th instanceof IOException); |
| assertTrue(th.getMessage().contains("fake delete failed")); |
| assertTrue("job temp dir does not exists", jobTmpDir.exists()); |
| FileUtil.fullyDelete(new File(outDir.toString())); |
| } |
| |
| public static String slurp(File f) throws IOException { |
| int len = (int) f.length(); |
| byte[] buf = new byte[len]; |
| FileInputStream in = new FileInputStream(f); |
| String contents = null; |
| try { |
| in.read(buf, 0, len); |
| contents = new String(buf, "UTF-8"); |
| } finally { |
| in.close(); |
| } |
| return contents; |
| } |
| |
| } |
