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MAPREDUCE-4146. Support limits on task status string length and number of block locations in branch-2. Contributed by Ahmed Radwan.

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git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1343755 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Thomas White 2012-05-29 14:43:40 +00:00
parent e576bac2f7
commit 45be2c085d
7 changed files with 292 additions and 11 deletions
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3
hadoop-mapreduce-project/CHANGES.txt
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@ -126,6 +126,9 @@ Release 2.0.1-alpha - UNRELEASED
IMPROVEMENTS
MAPREDUCE-4146. Support limits on task status string length and number of
block locations in branch-2. (Ahmed Radwan via tomwhite)
OPTIMIZATIONS
BUG FIXES

19
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapred/Task.java
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@ -53,7 +53,6 @@
import org.apache.hadoop.io.serializer.Deserializer;
import org.apache.hadoop.io.serializer.SerializationFactory;
import org.apache.hadoop.mapred.IFile.Writer;
import org.apache.hadoop.mapreduce.Counter;
import org.apache.hadoop.mapreduce.FileSystemCounter;
import org.apache.hadoop.mapreduce.OutputCommitter;
import org.apache.hadoop.mapreduce.TaskCounter;
@ -569,7 +568,21 @@ public void initialize(JobConf job, JobID id,
resourceCalculator.getProcResourceValues().getCumulativeCpuTime();
}
}
public static String normalizeStatus(String status, Configuration conf) {
// Check to see if the status string is too long
// and truncate it if needed.
int progressStatusLength = conf.getInt(
MRConfig.PROGRESS_STATUS_LEN_LIMIT_KEY,
MRConfig.PROGRESS_STATUS_LEN_LIMIT_DEFAULT);
if (status.length() > progressStatusLength) {
LOG.warn("Task status: \"" + status + "\" truncated to max limit ("
+ progressStatusLength + " characters)");
status = status.substring(0, progressStatusLength);
}
return status;
}
@InterfaceAudience.Private
@InterfaceStability.Unstable
protected class TaskReporter
@ -603,7 +616,7 @@ boolean resetProgressFlag() {
return progressFlag.getAndSet(false);
}
public void setStatus(String status) {
taskProgress.setStatus(status);
taskProgress.setStatus(normalizeStatus(status, conf));
// indicate that progress update needs to be sent
setProgressFlag();
}

8
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/MRConfig.java
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@ -71,4 +71,12 @@ public interface MRConfig {
public static final String TASK_LOCAL_OUTPUT_CLASS =
"mapreduce.task.local.output.class";
public static final String PROGRESS_STATUS_LEN_LIMIT_KEY =
"mapreduce.task.max.status.length";
public static final int PROGRESS_STATUS_LEN_LIMIT_DEFAULT = 512;
public static final int MAX_BLOCK_LOCATIONS_DEFAULT = 10;
public static final String MAX_BLOCK_LOCATIONS_KEY =
"mapreduce.job.max.split.locations";
}

26
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/split/JobSplitWriter.java
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@ -34,6 +34,7 @@
import org.apache.hadoop.mapreduce.InputSplit;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.JobSubmissionFiles;
import org.apache.hadoop.mapreduce.MRConfig;
import org.apache.hadoop.mapreduce.split.JobSplit.SplitMetaInfo;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
@ -48,6 +49,7 @@ public class JobSplitWriter {
private static final int splitVersion = JobSplit.META_SPLIT_VERSION;
private static final byte[] SPLIT_FILE_HEADER;
static {
try {
SPLIT_FILE_HEADER = "SPL".getBytes("UTF-8");
@ -82,7 +84,7 @@ public static void createSplitFiles(Path jobSubmitDir,
throws IOException {
FSDataOutputStream out = createFile(fs,
JobSubmissionFiles.getJobSplitFile(jobSubmitDir), conf);
SplitMetaInfo[] info = writeOldSplits(splits, out);
SplitMetaInfo[] info = writeOldSplits(splits, out, conf);
out.close();
writeJobSplitMetaInfo(fs,JobSubmissionFiles.getJobSplitMetaFile(jobSubmitDir),
new FsPermission(JobSubmissionFiles.JOB_FILE_PERMISSION), splitVersion,
@ -114,6 +116,8 @@ SplitMetaInfo[] writeNewSplits(Configuration conf,
if (array.length != 0) {
SerializationFactory factory = new SerializationFactory(conf);
int i = 0;
int maxBlockLocations = conf.getInt(MRConfig.MAX_BLOCK_LOCATIONS_KEY,
MRConfig.MAX_BLOCK_LOCATIONS_DEFAULT);
long offset = out.getPos();
for(T split: array) {
long prevCount = out.getPos();
@ -123,9 +127,15 @@ SplitMetaInfo[] writeNewSplits(Configuration conf,
serializer.open(out);
serializer.serialize(split);
long currCount = out.getPos();
String[] locations = split.getLocations();
if (locations.length > maxBlockLocations) {
throw new IOException("Max block location exceeded for split: "
+ split + " splitsize: " + locations.length +
" maxsize: " + maxBlockLocations);
}
info[i++] =
new JobSplit.SplitMetaInfo(
split.getLocations(), offset,
locations, offset,
split.getLength());
offset += currCount - prevCount;
}
@ -135,18 +145,26 @@ SplitMetaInfo[] writeNewSplits(Configuration conf,
private static SplitMetaInfo[] writeOldSplits(
org.apache.hadoop.mapred.InputSplit[] splits,
FSDataOutputStream out) throws IOException {
FSDataOutputStream out, Configuration conf) throws IOException {
SplitMetaInfo[] info = new SplitMetaInfo[splits.length];
if (splits.length != 0) {
int i = 0;
long offset = out.getPos();
int maxBlockLocations = conf.getInt(MRConfig.MAX_BLOCK_LOCATIONS_KEY,
MRConfig.MAX_BLOCK_LOCATIONS_DEFAULT);
for(org.apache.hadoop.mapred.InputSplit split: splits) {
long prevLen = out.getPos();
Text.writeString(out, split.getClass().getName());
split.write(out);
long currLen = out.getPos();
String[] locations = split.getLocations();
if (locations.length > maxBlockLocations) {
throw new IOException("Max block location exceeded for split: "
+ split + " splitsize: " + locations.length +
" maxsize: " + maxBlockLocations);
}
info[i++] = new JobSplit.SplitMetaInfo(
split.getLocations(), offset,
locations, offset,
split.getLength());
offset += currLen - prevLen;
}

6
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/task/TaskAttemptContextImpl.java
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@ -21,6 +21,7 @@
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.mapred.Task;
import org.apache.hadoop.mapreduce.Counter;
import org.apache.hadoop.mapreduce.Counters;
import org.apache.hadoop.mapreduce.StatusReporter;
@ -92,8 +93,9 @@ protected void setStatusString(String status) {
*/
@Override
public void setStatus(String status) {
setStatusString(status);
reporter.setStatus(status);
String normalizedStatus = Task.normalizeStatus(status, conf);
setStatusString(normalizedStatus);
reporter.setStatus(normalizedStatus);
}
public static class DummyReporter extends StatusReporter {

176
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/TestBlockLimits.java Normal file
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@ -0,0 +1,176 @@
/**
* 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.DataInput;
import java.io.DataOutput;
import java.io.File;
import java.io.IOException;
import java.util.Iterator;
import junit.framework.TestCase;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.io.WritableComparable;
import org.apache.hadoop.io.WritableUtils;
import org.apache.hadoop.util.Progressable;
import org.apache.hadoop.util.StringUtils;
/**
* A JUnit test to test limits on block locations
*/
public class TestBlockLimits extends TestCase {
private static String TEST_ROOT_DIR = new File(System.getProperty(
"test.build.data", "/tmp")).toURI().toString().replace(' ', '+');
public void testWithLimits() throws IOException, InterruptedException,
ClassNotFoundException {
MiniMRClientCluster mr = null;
try {
mr = MiniMRClientClusterFactory.create(this.getClass(), 2,
new Configuration());
runCustomFormat(mr);
} finally {
if (mr != null) {
mr.stop();
}
}
}
private void runCustomFormat(MiniMRClientCluster mr) throws IOException {
JobConf job = new JobConf(mr.getConfig());
FileSystem fileSys = FileSystem.get(job);
Path testDir = new Path(TEST_ROOT_DIR + "/test_mini_mr_local");
Path outDir = new Path(testDir, "out");
System.out.println("testDir= " + testDir);
fileSys.delete(testDir, true);
job.setInputFormat(MyInputFormat.class);
job.setOutputFormat(MyOutputFormat.class);
job.setOutputKeyClass(Text.class);
job.setOutputValueClass(IntWritable.class);
job.setMapperClass(MyMapper.class);
job.setReducerClass(MyReducer.class);
job.setNumMapTasks(100);
job.setNumReduceTasks(1);
job.set("non.std.out", outDir.toString());
try {
JobClient.runJob(job);
assertTrue(false);
} catch (IOException ie) {
System.out.println("Failed job " + StringUtils.stringifyException(ie));
} finally {
fileSys.delete(testDir, true);
}
}
static class MyMapper extends MapReduceBase implements
Mapper<WritableComparable, Writable, WritableComparable, Writable> {
public void map(WritableComparable key, Writable value,
OutputCollector<WritableComparable, Writable> out, Reporter reporter)
throws IOException {
}
}
static class MyReducer extends MapReduceBase implements
Reducer<WritableComparable, Writable, WritableComparable, Writable> {
public void reduce(WritableComparable key, Iterator<Writable> values,
OutputCollector<WritableComparable, Writable> output, Reporter reporter)
throws IOException {
}
}
private static class MyInputFormat implements InputFormat<IntWritable, Text> {
private static class MySplit implements InputSplit {
int first;
int length;
public MySplit() {
}
public MySplit(int first, int length) {
this.first = first;
this.length = length;
}
public String[] getLocations() {
return new String[200];
}
public long getLength() {
return length;
}
public void write(DataOutput out) throws IOException {
WritableUtils.writeVInt(out, first);
WritableUtils.writeVInt(out, length);
}
public void readFields(DataInput in) throws IOException {
first = WritableUtils.readVInt(in);
length = WritableUtils.readVInt(in);
}
}
public InputSplit[] getSplits(JobConf job, int numSplits)
throws IOException {
return new MySplit[] { new MySplit(0, 1), new MySplit(1, 3),
new MySplit(4, 2) };
}
public RecordReader<IntWritable, Text> getRecordReader(InputSplit split,
JobConf job, Reporter reporter) throws IOException {
return null;
}
}
static class MyOutputFormat implements OutputFormat {
static class MyRecordWriter implements RecordWriter<Object, Object> {
public MyRecordWriter(Path outputFile, JobConf job) throws IOException {
}
public void write(Object key, Object value) throws IOException {
return;
}
public void close(Reporter reporter) throws IOException {
}
}
public RecordWriter getRecordWriter(FileSystem ignored, JobConf job,
String name, Progressable progress) throws IOException {
return new MyRecordWriter(new Path(job.get("non.std.out")), job);
}
public void checkOutputSpecs(FileSystem ignored, JobConf job)
throws IOException {
}
}
}

65
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/TestReporter.java
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@ -17,6 +17,7 @@
*/
package org.apache.hadoop.mapred;
import java.io.DataOutputStream;
import java.io.IOException;
import java.util.Iterator;
@ -25,10 +26,15 @@
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.MRConfig;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;
import static org.junit.Assert.*;
/**
@ -98,7 +104,28 @@ public void close() throws IOException {
progressRange, reporter.getProgress(), 0f);
}
}
static class StatusLimitMapper extends
org.apache.hadoop.mapreduce.Mapper<LongWritable, Text, Text, Text> {
@Override
public void map(LongWritable key, Text value, Context context)
throws IOException {
StringBuilder sb = new StringBuilder(512);
for (int i = 0; i < 1000; i++) {
sb.append("a");
}
context.setStatus(sb.toString());
int progressStatusLength = context.getConfiguration().getInt(
MRConfig.PROGRESS_STATUS_LEN_LIMIT_KEY,
MRConfig.PROGRESS_STATUS_LEN_LIMIT_DEFAULT);
if (context.getStatus().length() > progressStatusLength) {
throw new IOException("Status is not truncated");
}
}
}
/**
* Test {@link Reporter}'s progress for a map-only job.
* This will make sure that only the map phase decides the attempt's progress.
@ -166,7 +193,6 @@ public void close() throws IOException {
/**
* Test {@link Reporter}'s progress for map-reduce job.
*/
@SuppressWarnings("deprecation")
@Test
public void testReporterProgressForMRJob() throws IOException {
Path test = new Path(testRootTempDir, "testReporterProgressForMRJob");
@ -186,4 +212,39 @@ public void testReporterProgressForMRJob() throws IOException {
assertTrue("Job failed", job.isSuccessful());
}
@Test
public void testStatusLimit() throws IOException, InterruptedException,
ClassNotFoundException {
Path test = new Path(testRootTempDir, "testStatusLimit");
Configuration conf = new Configuration();
Path inDir = new Path(test, "in");
Path outDir = new Path(test, "out");
FileSystem fs = FileSystem.get(conf);
if (fs.exists(inDir)) {
fs.delete(inDir, true);
}
fs.mkdirs(inDir);
DataOutputStream file = fs.create(new Path(inDir, "part-" + 0));
file.writeBytes("testStatusLimit");
file.close();
if (fs.exists(outDir)) {
fs.delete(outDir, true);
}
Job job = Job.getInstance(conf, "testStatusLimit");
job.setMapperClass(StatusLimitMapper.class);
job.setNumReduceTasks(0);
FileInputFormat.addInputPath(job, inDir);
FileOutputFormat.setOutputPath(job, outDir);
job.waitForCompletion(true);
assertTrue("Job failed", job.isSuccessful());
}
}