| /** |
| * 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.*; |
| import java.net.URI; |
| |
| import junit.framework.TestCase; |
| |
| import org.apache.hadoop.fs.*; |
| import org.apache.hadoop.io.*; |
| import org.apache.hadoop.mapred.JobContextImpl; |
| import org.apache.hadoop.mapred.TaskAttemptContextImpl; |
| import org.apache.hadoop.mapreduce.JobStatus; |
| |
| 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 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"); |
| |
| @SuppressWarnings("unchecked") |
| private void writeOutput(RecordWriter theRecordWriter, Reporter reporter) |
| throws IOException { |
| 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(reporter); |
| } |
| } |
| |
| private void setConfForFileOutputCommitter(JobConf job) { |
| job.set(JobContext.TASK_ATTEMPT_ID, attempt); |
| job.setOutputCommitter(FileOutputCommitter.class); |
| FileOutputFormat.setOutputPath(job, outDir); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public void testCommitter() throws Exception { |
| JobConf job = new JobConf(); |
| setConfForFileOutputCommitter(job); |
| JobContext jContext = new JobContextImpl(job, taskID.getJobID()); |
| TaskAttemptContext tContext = new TaskAttemptContextImpl(job, taskID); |
| FileOutputCommitter committer = new FileOutputCommitter(); |
| FileOutputFormat.setWorkOutputPath(job, |
| committer.getTempTaskOutputPath(tContext)); |
| |
| committer.setupJob(jContext); |
| committer.setupTask(tContext); |
| String file = "test.txt"; |
| |
| // A reporter that does nothing |
| Reporter reporter = Reporter.NULL; |
| // write output |
| FileSystem localFs = FileSystem.getLocal(job); |
| TextOutputFormat theOutputFormat = new TextOutputFormat(); |
| RecordWriter theRecordWriter = |
| theOutputFormat.getRecordWriter(localFs, job, file, reporter); |
| writeOutput(theRecordWriter, reporter); |
| |
| // do commit |
| committer.commitTask(tContext); |
| committer.commitJob(jContext); |
| |
| // validate output |
| File expectedFile = new File(new Path(outDir, file).toString()); |
| 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 = UtilsForTests.slurp(expectedFile); |
| assertEquals(output, expectedOutput.toString()); |
| |
| FileUtil.fullyDelete(new File(outDir.toString())); |
| } |
| |
| public void testAbort() throws IOException { |
| JobConf job = new JobConf(); |
| setConfForFileOutputCommitter(job); |
| JobContext jContext = new JobContextImpl(job, taskID.getJobID()); |
| TaskAttemptContext tContext = new TaskAttemptContextImpl(job, taskID); |
| FileOutputCommitter committer = new FileOutputCommitter(); |
| FileOutputFormat.setWorkOutputPath(job, committer |
| .getTempTaskOutputPath(tContext)); |
| |
| // do setup |
| committer.setupJob(jContext); |
| committer.setupTask(tContext); |
| String file = "test.txt"; |
| |
| // A reporter that does nothing |
| Reporter reporter = Reporter.NULL; |
| // write output |
| FileSystem localFs = FileSystem.getLocal(job); |
| TextOutputFormat theOutputFormat = new TextOutputFormat(); |
| RecordWriter theRecordWriter = theOutputFormat.getRecordWriter(localFs, |
| job, file, reporter); |
| writeOutput(theRecordWriter, reporter); |
| |
| // do abort |
| committer.abortTask(tContext); |
| File expectedFile = new File(new Path(committer |
| .getTempTaskOutputPath(tContext), file).toString()); |
| assertFalse("task temp dir still exists", expectedFile.exists()); |
| |
| committer.abortJob(jContext, JobStatus.State.FAILED); |
| expectedFile = new File(new Path(outDir, FileOutputCommitter.TEMP_DIR_NAME) |
| .toString()); |
| assertFalse("job temp dir still exists", expectedFile.exists()); |
| assertEquals("Output directory not empty", 0, new File(outDir.toString()) |
| .listFiles().length); |
| FileUtil.fullyDelete(new File(outDir.toString())); |
| } |
| |
| 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 { |
| JobConf job = new JobConf(); |
| job.set(FileSystem.FS_DEFAULT_NAME_KEY, "faildel:///"); |
| job.setClass("fs.faildel.impl", FakeFileSystem.class, FileSystem.class); |
| setConfForFileOutputCommitter(job); |
| JobContext jContext = new JobContextImpl(job, taskID.getJobID()); |
| TaskAttemptContext tContext = new TaskAttemptContextImpl(job, taskID); |
| FileOutputCommitter committer = new FileOutputCommitter(); |
| FileOutputFormat.setWorkOutputPath(job, committer |
| .getTempTaskOutputPath(tContext)); |
| |
| // do setup |
| committer.setupJob(jContext); |
| committer.setupTask(tContext); |
| String file = "test.txt"; |
| |
| // A reporter that does nothing |
| Reporter reporter = Reporter.NULL; |
| // write output |
| FileSystem localFs = new FakeFileSystem(); |
| TextOutputFormat theOutputFormat = new TextOutputFormat(); |
| RecordWriter theRecordWriter = theOutputFormat.getRecordWriter(localFs, |
| job, file, reporter); |
| writeOutput(theRecordWriter, reporter); |
| |
| // 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")); |
| File jobTmpDir = new File(new Path(outDir, |
| FileOutputCommitter.TEMP_DIR_NAME).toString()); |
| File taskTmpDir = new File(jobTmpDir, "_" + taskID); |
| File expectedFile = new File(taskTmpDir, file); |
| 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()); |
| } |
| } |