共计 30076 个字符，预计需要花费 76 分钟才能阅读完成。
开发环境搭建参考
<Hadoop 在 Windows7 操作系统下使用 Eclipse 来搭建 Hadoop 开发环境 >：http://www.linuxidc.com/Linux/2014-12/111061.htm
1，程序代码如下：
package wc;
import java.io.IOException;
import java.util.StringTokenizer;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.Mapper;
import org.apache.hadoop.mapreduce.Reducer;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
import org.apache.hadoop.util.GenericOptionsParser;
public class W2 {
public static class TokenizerMapper extends Mapper<Object, Text, Text, IntWritable> {
private final static IntWritable one = new IntWritable(1);
private Text word = new Text();
public void map(Object key, Text value, Context context)
throws IOException, InterruptedException {
StringTokenizer itr = new StringTokenizer(value.toString());
while (itr.hasMoreTokens()) {
word.set(itr.nextToken());
context.write(word, one);
}
}
}
public static class IntSumReducer extends
Reducer<Text, IntWritable, Text, IntWritable> {
private IntWritable result = new IntWritable();
public void reduce(Text key, Iterable<IntWritable> values,
Context context) throws IOException, InterruptedException {
int sum = 0;
for (IntWritable val : values) {
sum += val.get();
}
result.set(sum);
context.write(key, result);
}
}
public static void main(String[] args) throws Exception {
Configuration conf = new Configuration();
System.setProperty(“hadoop.home.dir”, “E:/hadoop/hadoop-2.3.0”);
String[] otherArgs = new GenericOptionsParser(conf, args).getRemainingArgs();
if (otherArgs.length != 2) {
System.err.println(“Usage: wordcount <in> <out>”);
System.exit(2);
}
Job job = new Job(conf, “word count”);
job.setJarByClass(W2.class);
job.setMapperClass(TokenizerMapper.class);
job.setCombinerClass(IntSumReducer.class);
job.setReducerClass(IntSumReducer.class);
job.setOutputKeyClass(Text.class);
job.setOutputValueClass(IntWritable.class);
FileInputFormat.addInputPath(job, new Path(otherArgs[0]));
FileOutputFormat.setOutputPath(job, new Path(otherArgs[1]));
System.exit(job.waitForCompletion(true) ? 0 : 1);
}
}
2，运行方式：
在 eclipse 中 W2.java 代码区点击右键，点击里面的 run on hadoop 即可运行该程序。
3，运行报错 (1)：
Exception in thread “main” java.lang.NoClassDefFoundError: com/google/common/base/Preconditions
at org.apache.hadoop.conf.Configuration$DeprecationDelta.<init>(Configuration.java:314)
at org.apache.hadoop.conf.Configuration$DeprecationDelta.<init>(Configuration.java:327)
at org.apache.hadoop.conf.Configuration.<clinit>(Configuration.java:409)
at wc.WordCount.main(WordCount.java:82)
Caused by: java.lang.ClassNotFoundException: com.google.common.base.Preconditions
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
… 4 more
少了 guava-r07.jar 包。
4，运行报错 (2):
Exception in thread “main” java.lang.NoClassDefFoundError: org/apache/hadoop/util/PlatformName
缺少 hadoop-auth-2.2.0.jar 包，这个包在. /eclipse/configuration/org.eclipse.osgi/bundles/230/1/.cp/lib/hadoop-auth-2.2.0.jar 里面
5，运行报错 (3)：
Exception in thread “main” java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory
缺少 2 个包：
/usr/local/eclipse/configuration/org.eclipse.osgi/bundles/230/1/.cp/lib/slf4j-api-1.7.5.jar
/usr/local/eclipse/configuration/org.eclipse.osgi/bundles/230/1/.cp/lib/slf4j-log4j12-1.7.5.jar
6，运行报错 (4)：
在 Eclipse 运行 hadoop 报错：
2014-12-11 20:12:01,750 INFO [main] Configuration.deprecation (Configuration.java:warnOnceIfDeprecated(996)) – fs.default.name is deprecated. Instead, use fs.defaultFS
SLF4J: This version of SLF4J requires log4j version 1.2.12 or later. See also http://www.slf4j.org/codes.html#log4j_version
2014-12-11 20:12:02,760 WARN [main] util.NativeCodeLoader (NativeCodeLoader.java:<clinit>(62)) – Unable to load native-hadoop library for your platform… using builtin-java classes where applicable
2014-12-11 20:12:02,812 ERROR [main] util.Shell (Shell.java:getWinUtilsPath(336)) – Failed to locate the winutils binary in the hadoop binary path
java.io.IOException: Could not locate executable null\bin\winutils.exe in the Hadoop binaries.
解决：
代码里加上 System.setProperty(“hadoop.home.dir”, “d:/hadoop”); 并查看 Windows 环境下 Hadoop 目录下的 bin 目录下有没有 winutils.exe，没有就下一个拷贝过去。
7，运行报错 (5)：
报错：
Exception in thread “main” java.lang.NoClassDefFoundError: com/google/protobuf/ServiceException
at org.apache.hadoop.ipc.ProtobufRpcEngine.<clinit>(ProtobufRpcEngine.java:69)
at java.lang.Class.forName0(Native Method)
缺乏 /usr/local/app/apache-tomcat-6.0.37_9090/webapps/solr/WEB-INF/lib/protobuf-java-2.4.0a.jar
Exception in thread “main” java.lang.VerifyError: class org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$AppendRequestProto overrides final method getUnknownFields.()Lcom/google/protobuf/UnknownFieldSet;
需要换成 protobuf-java-2.5.0.jar 包。
8，运行报错 (6)：
Caused by: java.lang.ClassNotFoundException: com.google.common.cache.CacheBuilder
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
… 12 more
少 guava-11.0.2.jar 包
9，运行报错 (7)：
Exception in thread “main” org.apache.hadoop.security.AccessControlException: Permission denied: user=Administrator, access=EXECUTE, inode=”/tmp”:hadoop:supergroup:drwx——
at org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.check(FSPermissionChecker.java:234)
at org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.checkTraverse(FSPermissionChecker.java:187)
at org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.checkPermission(FSPermissionChecker.java:150)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkPermission(FSNamesystem.java:5433)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkPermission(FSNamesystem.java:5415)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkOwner(FSNamesystem.java:5371)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.setPermissionInt(FSNamesystem.java:1462)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.setPermission(FSNamesystem.java:1443)
at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.setPermission(NameNodeRpcServer.java:536)
at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.setPermission(ClientNamenodeProtocolServerSideTranslatorPB.java:368)
at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:585)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:928)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1962)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1958)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1548)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1956)
10，运行报错 (8)：
报错如下：
2014-12-16 10:16:09,632 INFO [main] Configuration.deprecation (Configuration.java:warnOnceIfDeprecated(996)) – fs.default.name is deprecated. Instead, use fs.defaultFS
2014-12-16 10:16:11,597 WARN [main] util.NativeCodeLoader (NativeCodeLoader.java:<clinit>(62)) – Unable to load native-hadoop library for your platform… using builtin-java classes where applicable
Job start!
2014-12-16 10:16:28,819 INFO [main] client.RMProxy (RMProxy.java:createRMProxy(92)) – Connecting to ResourceManager at /192.168.52.128:8032
2014-12-16 10:16:29,714 WARN [main] security.UserGroupInformation (UserGroupInformation.java:doAs(1551)) – PriviledgedActionException as:Administrator (auth:SIMPLE) cause:java.io.IOException: The ownership on the staging directory /tmp/hadoop-yarn/staging/Administrator/.staging is not as expected. It is owned by hadoop. The directory must be owned by the submitter Administrator or by Administrator
Exception in thread “main” java.io.IOException: The ownership on the staging directory /tmp/hadoop-yarn/staging/Administrator/.staging is not as expected. It is owned by hadoop. The directory must be owned by the submitter Administrator or by Administrator
at org.apache.hadoop.mapreduce.JobSubmissionFiles.getStagingDir(JobSubmissionFiles.java:112)
at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:348)
at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1285)
at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1282)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Unknown Source)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1548)
at org.apache.hadoop.mapreduce.Job.submit(Job.java:1282)
at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1303)
at wc.WordCount.main(WordCount.java:147)
解决方法：
接着选择 ” 本地用户和组 ”，展开 ” 用户 ”，找到系统管理员 ”Administrator”，修改其为 ”hadoop”，操作结果如下图：
最后，把电脑进行 ” 注销 ” 或者 ” 重启电脑 ”，这样才能使管理员才能用这个名字。再次运行之后，显示正常，能连接到 linux 下的 hadoop 服务了，控制台信息如下显示:
2014-12-16 11:01:07,009 INFO [main] Configuration.deprecation (Configuration.java:warnOnceIfDeprecated(996)) – fs.default.name is deprecated. Instead, use fs.defaultFS
2014-12-16 11:01:12,938 WARN [main] util.NativeCodeLoader (NativeCodeLoader.java:<clinit>(62)) – Unable to load native-hadoop library for your platform… using builtin-java classes where applicable
Job start!
2014-12-16 11:01:39,646 INFO [main] client.RMProxy (RMProxy.java:createRMProxy(92)) – Connecting to ResourceManager at /192.168.52.128:8032
2014-12-16 11:01:49,297 INFO [main] mapreduce.JobSubmissionFiles (JobSubmissionFiles.java:getStagingDir(119)) – Permissions on staging directory /tmp/hadoop-yarn/staging/hadoop/.staging are incorrect: rwxrwxrwx. Fixing permissions to correct value rwx——
2014-12-16 11:01:56,366 WARN [main] mapreduce.JobSubmitter (JobSubmitter.java:copyAndConfigureFiles(150)) – Hadoop command-line option parsing not performed. Implement the Tool interface and execute your application with ToolRunner to remedy this.
2014-12-16 11:02:14,657 INFO [main] input.FileInputFormat (FileInputFormat.java:listStatus(287)) – Total input paths to process : 1
2014-12-16 11:02:15,781 INFO [main] mapreduce.JobSubmitter (JobSubmitter.java:submitJobInternal(396)) – number of splits:1
2014-12-16 11:02:16,057 INFO [main] Configuration.deprecation (Configuration.java:warnOnceIfDeprecated(996)) – fs.default.name is deprecated. Instead, use fs.defaultFS
2014-12-16 11:02:16,711 INFO [main] mapreduce.JobSubmitter (JobSubmitter.java:printTokens(479)) – Submitting tokens for job: job_1418698686855_0001
2014-12-16 11:02:20,493 INFO [main] impl.YarnClientImpl (YarnClientImpl.java:submitApplication(166)) – Submitted application application_1418698686855_0001
2014-12-16 11:02:21,353 INFO [main] mapreduce.Job (Job.java:submit(1289)) – The url to track the job: http://name01:8088/proxy/application_1418698686855_0001/
2014-12-16 11:02:21,393 INFO [main] mapreduce.Job (Job.java:monitorAndPrintJob(1334)) – Running job: job_1418698686855_0001
2014-12-16 11:02:45,306 INFO [main] mapreduce.Job (Job.java:monitorAndPrintJob(1355)) – Job job_1418698686855_0001 running in uber mode : false
2014-12-16 11:02:45,392 INFO [main] mapreduce.Job (Job.java:monitorAndPrintJob(1362)) – map 0% reduce 0%
2014-12-16 11:02:45,543 INFO [main] mapreduce.Job (Job.java:monitorAndPrintJob(1375)) – Job job_1418698686855_0001 failed with state FAILED due to: Application application_1418698686855_0001 failed 2 times due to AM Container for appattempt_1418698686855_0001_000002 exited with exitCode: 1 due to: Exception from container-launch: org.apache.hadoop.util.Shell$ExitCodeException: /bin/bash: line 0: fg: no job control
org.apache.hadoop.util.Shell$ExitCodeException: /bin/bash: line 0: fg: no job control
at org.apache.hadoop.util.Shell.runCommand(Shell.java:505)
at org.apache.hadoop.util.Shell.run(Shell.java:418)
at org.apache.hadoop.util.Shell$ShellCommandExecutor.execute(Shell.java:650)
at org.apache.hadoop.yarn.server.nodemanager.DefaultContainerExecutor.launchContainer(DefaultContainerExecutor.java:195)
at org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call(ContainerLaunch.java:283)
at org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call(ContainerLaunch.java:79)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Container exited with a non-zero exit code 1
.Failing this attempt.. Failing the application.
2014-12-16 11:02:45,955 INFO [main] mapreduce.Job (Job.java:monitorAndPrintJob(1380)) – Counters: 0
error!
11，运行报错 (9)：
2014-12-16 15:31:45,980 INFO [main] Configuration.deprecation (Configuration.java:warnOnceIfDeprecated(996)) – session.id is deprecated. Instead, use dfs.metrics.session-id
2014-12-16 15:31:45,986 INFO [main] jvm.JvmMetrics (JvmMetrics.java:init(76)) – Initializing JVM Metrics with processName=JobTracker, sessionId=
2014-12-16 15:31:46,213 WARN [main] security.UserGroupInformation (UserGroupInformation.java:doAs(1551)) – PriviledgedActionException as:hadoop (auth:SIMPLE) cause:org.apache.hadoop.mapred.FileAlreadyExistsException: Output directory hdfs://192.168.52.128:9000/data/output already exists
Exception in thread “main” org.apache.hadoop.mapred.FileAlreadyExistsException: Output directory hdfs://192.168.52.128:9000/data/output already exists
at org.apache.hadoop.mapreduce.lib.output.FileOutputFormat.checkOutputSpecs(FileOutputFormat.java:146)
at org.apache.hadoop.mapreduce.JobSubmitter.checkSpecs(JobSubmitter.java:458)
删除原来的 /data/output 目录
12，运行报错 (10)：
Could not locate executable null\bin\winutils.exe in the Hadoop binaries
老掉牙的问题了，系统变量未设置 HADOOP_HOME，系统变量设置 HADOOP_HOME，或者直接加一句代码指定路径地址：
System.setProperty(“hadoop.home.dir”, “E:/hadoop/hadoop-2.3.0”);
13，运行报错 (11)：
2014-12-16 14:28:58,589 WARN [main] util.NativeCodeLoader (NativeCodeLoader.java:<clinit>(62)) – Unable to load native-hadoop library for your platform… using builtin-java classes where applicable
2014-12-16 14:29:08,664 INFO [main] Configuration.deprecation (Configuration.java:warnOnceIfDeprecated(996)) – session.id is deprecated. Instead, use dfs.metrics.session-id
2014-12-16 14:29:08,665 INFO [main] jvm.JvmMetrics (JvmMetrics.java:init(76)) – Initializing JVM Metrics with processName=JobTracker, sessionId=
2014-12-16 14:29:10,026 INFO [main] input.FileInputFormat (FileInputFormat.java:listStatus(287)) – Total input paths to process : 1
2014-12-16 14:29:11,164 INFO [main] mapreduce.JobSubmitter (JobSubmitter.java:submitJobInternal(396)) – number of splits:1
2014-12-16 14:29:11,761 INFO [main] mapreduce.JobSubmitter (JobSubmitter.java:printTokens(479)) – Submitting tokens for job: job_local1985238633_0001
2014-12-16 14:29:11,810 WARN [main] conf.Configuration (Configuration.java:loadProperty(2345)) – file:/tmp/hadoop-hadoop/mapred/staging/hadoop1985238633/.staging/job_local1985238633_0001/job.xml:an attempt to override final parameter: mapreduce.job.end-notification.max.retry.interval; Ignoring.
2014-12-16 14:29:11,811 WARN [main] conf.Configuration (Configuration.java:loadProperty(2345)) – file:/tmp/hadoop-hadoop/mapred/staging/hadoop1985238633/.staging/job_local1985238633_0001/job.xml:an attempt to override final parameter: mapreduce.job.end-notification.max.attempts; Ignoring.
2014-12-16 14:29:11,916 INFO [main] mapreduce.JobSubmitter (JobSubmitter.java:submitJobInternal(441)) – Cleaning up the staging area file:/tmp/hadoop-hadoop/mapred/staging/hadoop1985238633/.staging/job_local1985238633_0001
Exception in thread “main” java.lang.UnsatisfiedLinkError: org.apache.hadoop.io.nativeio.NativeIO$Windows.access0(Ljava/lang/String;I)Z
at org.apache.hadoop.io.nativeio.NativeIO$Windows.access0(Native Method)
at org.apache.hadoop.io.nativeio.NativeIO$Windows.access(NativeIO.java:560)
at org.apache.hadoop.fs.FileUtil.canRead(FileUtil.java:977)
at org.apache.hadoop.util.DiskChecker.checkAccessByFileMethods(DiskChecker.java:177)
at org.apache.hadoop.util.DiskChecker.checkDirAccess(DiskChecker.java:164)
at org.apache.hadoop.util.DiskChecker.checkDir(DiskChecker.java:98)
at org.apache.hadoop.fs.LocalDirAllocator$AllocatorPerContext.confChanged(LocalDirAllocator.java:285)
at org.apache.hadoop.fs.LocalDirAllocator$AllocatorPerContext.getLocalPathForWrite(LocalDirAllocator.java:344)
at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:150)
at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:131)
at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:115)
at org.apache.hadoop.mapred.LocalDistributedCacheManager.setup(LocalDistributedCacheManager.java:131)
at org.apache.hadoop.mapred.LocalJobRunner$Job.<init>(LocalJobRunner.java:163)
at org.apache.hadoop.mapred.LocalJobRunner.submitJob(LocalJobRunner.java:731)
at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:432)
at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1285)
at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1282)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Unknown Source)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1548)
at org.apache.hadoop.mapreduce.Job.submit(Job.java:1282)
at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1303)
at wc.W2.main(W2.java:111)
缺乏 hadoop.dll，下载 hadoop.dll 放到 hadoop/bin 目录下即可，但是之后运行依然报错，还需要手动设置下 hadoop 在 windows 下的运行路径，于是在 Eclipse 运行环境中，在运行的 WordCount.java 中，右键点击在下拉菜单栏里面选择 Run Configurations，然后加上 path 的设置，Run 顺利通过。参数如下图所示：
之后调试通过，运行结果如下：
2014-12-16 15:34:01,303 INFO [main] Configuration.deprecation (Configuration.java:warnOnceIfDeprecated(996)) – session.id is deprecated. Instead, use dfs.metrics.session-id
2014-12-16 15:34:01,309 INFO [main] jvm.JvmMetrics (JvmMetrics.java:init(76)) – Initializing JVM Metrics with processName=JobTracker, sessionId=
2014-12-16 15:34:02,047 INFO [main] input.FileInputFormat (FileInputFormat.java:listStatus(287)) – Total input paths to process : 1
2014-12-16 15:34:02,120 INFO [main] mapreduce.JobSubmitter (JobSubmitter.java:submitJobInternal(396)) – number of splits:1
2014-12-16 15:34:02,323 INFO [main] mapreduce.JobSubmitter (JobSubmitter.java:printTokens(479)) – Submitting tokens for job: job_local1764589720_0001
2014-12-16 15:34:02,367 WARN [main] conf.Configuration (Configuration.java:loadProperty(2345)) – file:/tmp/hadoop-hadoop/mapred/staging/hadoop1764589720/.staging/job_local1764589720_0001/job.xml:an attempt to override final parameter: mapreduce.job.end-notification.max.retry.interval; Ignoring.
2014-12-16 15:34:02,368 WARN [main] conf.Configuration (Configuration.java:loadProperty(2345)) – file:/tmp/hadoop-hadoop/mapred/staging/hadoop1764589720/.staging/job_local1764589720_0001/job.xml:an attempt to override final parameter: mapreduce.job.end-notification.max.attempts; Ignoring.
2014-12-16 15:34:02,682 WARN [main] conf.Configuration (Configuration.java:loadProperty(2345)) – file:/tmp/hadoop-hadoop/mapred/local/localRunner/hadoop/job_local1764589720_0001/job_local1764589720_0001.xml:an attempt to override final parameter: mapreduce.job.end-notification.max.retry.interval; Ignoring.
2014-12-16 15:34:02,682 WARN [main] conf.Configuration (Configuration.java:loadProperty(2345)) – file:/tmp/hadoop-hadoop/mapred/local/localRunner/hadoop/job_local1764589720_0001/job_local1764589720_0001.xml:an attempt to override final parameter: mapreduce.job.end-notification.max.attempts; Ignoring.
2014-12-16 15:34:02,703 INFO [main] mapreduce.Job (Job.java:submit(1289)) – The url to track the job: http://localhost:8080/
2014-12-16 15:34:02,704 INFO [main] mapreduce.Job (Job.java:monitorAndPrintJob(1334)) – Running job: job_local1764589720_0001
2014-12-16 15:34:02,707 INFO [Thread-4] mapred.LocalJobRunner (LocalJobRunner.java:createOutputCommitter(471)) – OutputCommitter set in config null
2014-12-16 15:34:02,719 INFO [Thread-4] mapred.LocalJobRunner (LocalJobRunner.java:createOutputCommitter(489)) – OutputCommitter is org.apache.hadoop.mapreduce.lib.output.FileOutputCommitter
2014-12-16 15:34:02,853 INFO [Thread-4] mapred.LocalJobRunner (LocalJobRunner.java:runTasks(448)) – Waiting for map tasks
2014-12-16 15:34:02,857 INFO [LocalJobRunner Map Task Executor #0] mapred.LocalJobRunner (LocalJobRunner.java:run(224)) – Starting task: attempt_local1764589720_0001_m_000000_0
2014-12-16 15:34:02,919 INFO [LocalJobRunner Map Task Executor #0] util.ProcfsBasedProcessTree (ProcfsBasedProcessTree.java:isAvailable(129)) – ProcfsBasedProcessTree currently is supported only on Linux.
2014-12-16 15:34:03,281 INFO [LocalJobRunner Map Task Executor #0] mapred.Task (Task.java:initialize(581)) – Using ResourceCalculatorProcessTree : org.apache.hadoop.yarn.util.WindowsBasedProcessTree@2e1022ec
2014-12-16 15:34:03,287 INFO [LocalJobRunner Map Task Executor #0] mapred.MapTask (MapTask.java:runNewMapper(733)) – Processing split: hdfs://192.168.52.128:9000/data/input/README.txt:0+1366
2014-12-16 15:34:03,304 INFO [LocalJobRunner Map Task Executor #0] mapred.MapTask (MapTask.java:createSortingCollector(388)) – Map output collector class = org.apache.hadoop.mapred.MapTask$MapOutputBuffer
2014-12-16 15:34:03,340 INFO [LocalJobRunner Map Task Executor #0] mapred.MapTask (MapTask.java:setEquator(1181)) – (EQUATOR) 0 kvi 26214396(104857584)
2014-12-16 15:34:03,341 INFO [LocalJobRunner Map Task Executor #0] mapred.MapTask (MapTask.java:init(975)) – mapreduce.task.io.sort.mb: 100
2014-12-16 15:34:03,341 INFO [LocalJobRunner Map Task Executor #0] mapred.MapTask (MapTask.java:init(976)) – soft limit at 83886080
2014-12-16 15:34:03,341 INFO [LocalJobRunner Map Task Executor #0] mapred.MapTask (MapTask.java:init(977)) – bufstart = 0; bufvoid = 104857600
2014-12-16 15:34:03,341 INFO [LocalJobRunner Map Task Executor #0] mapred.MapTask (MapTask.java:init(978)) – kvstart = 26214396; length = 6553600
2014-12-16 15:34:03,708 INFO [main] mapreduce.Job (Job.java:monitorAndPrintJob(1355)) – Job job_local1764589720_0001 running in uber mode : false
2014-12-16 15:34:03,710 INFO [main] mapreduce.Job (Job.java:monitorAndPrintJob(1362)) – map 0% reduce 0%
2014-12-16 15:34:04,121 INFO [LocalJobRunner Map Task Executor #0] mapred.LocalJobRunner (LocalJobRunner.java:statusUpdate(591)) –
2014-12-16 15:34:04,128 INFO [LocalJobRunner Map Task Executor #0] mapred.MapTask (MapTask.java:flush(1435)) – Starting flush of map output
2014-12-16 15:34:04,128 INFO [LocalJobRunner Map Task Executor #0] mapred.MapTask (MapTask.java:flush(1453)) – Spilling map output
2014-12-16 15:34:04,128 INFO [LocalJobRunner Map Task Executor #0] mapred.MapTask (MapTask.java:flush(1454)) – bufstart = 0; bufend = 2055; bufvoid = 104857600
2014-12-16 15:34:04,128 INFO [LocalJobRunner Map Task Executor #0] mapred.MapTask (MapTask.java:flush(1456)) – kvstart = 26214396(104857584); kvend = 26213684(104854736); length = 713/6553600
2014-12-16 15:34:04,179 INFO [LocalJobRunner Map Task Executor #0] mapred.MapTask (MapTask.java:sortAndSpill(1639)) – Finished spill 0
2014-12-16 15:34:04,194 INFO [LocalJobRunner Map Task Executor #0] mapred.Task (Task.java:done(995)) – Task:attempt_local1764589720_0001_m_000000_0 is done. And is in the process of committing
2014-12-16 15:34:04,207 INFO [LocalJobRunner Map Task Executor #0] mapred.LocalJobRunner (LocalJobRunner.java:statusUpdate(591)) – map
2014-12-16 15:34:04,208 INFO [LocalJobRunner Map Task Executor #0] mapred.Task (Task.java:sendDone(1115)) – Task ‘attempt_local1764589720_0001_m_000000_0’ done.
2014-12-16 15:34:04,208 INFO [LocalJobRunner Map Task Executor #0] mapred.LocalJobRunner (LocalJobRunner.java:run(249)) – Finishing task: attempt_local1764589720_0001_m_000000_0
2014-12-16 15:34:04,208 INFO [Thread-4] mapred.LocalJobRunner (LocalJobRunner.java:runTasks(456)) – map task executor complete.
2014-12-16 15:34:04,211 INFO [Thread-4] mapred.LocalJobRunner (LocalJobRunner.java:runTasks(448)) – Waiting for reduce tasks
2014-12-16 15:34:04,211 INFO [pool-6-thread-1] mapred.LocalJobRunner (LocalJobRunner.java:run(302)) – Starting task: attempt_local1764589720_0001_r_000000_0
2014-12-16 15:34:04,221 INFO [pool-6-thread-1] util.ProcfsBasedProcessTree (ProcfsBasedProcessTree.java:isAvailable(129)) – ProcfsBasedProcessTree currently is supported only on Linux.
2014-12-16 15:34:04,478 INFO [pool-6-thread-1] mapred.Task (Task.java:initialize(581)) – Using ResourceCalculatorProcessTree : org.apache.hadoop.yarn.util.WindowsBasedProcessTree@36154615
2014-12-16 15:34:04,483 INFO [pool-6-thread-1] mapred.ReduceTask (ReduceTask.java:run(362)) – Using ShuffleConsumerPlugin: org.apache.hadoop.mapreduce.task.reduce.Shuffle@e2b02a3
2014-12-16 15:34:04,500 INFO [pool-6-thread-1] reduce.MergeManagerImpl (MergeManagerImpl.java:<init>(193)) – MergerManager: memoryLimit=949983616, maxSingleShuffleLimit=237495904, mergeThreshold=626989184, ioSortFactor=10, memToMemMergeOutputsThreshold=10
2014-12-16 15:34:04,503 INFO [EventFetcher for fetching Map Completion Events] reduce.EventFetcher (EventFetcher.java:run(61)) – attempt_local1764589720_0001_r_000000_0 Thread started: EventFetcher for fetching Map Completion Events
2014-12-16 15:34:04,543 INFO [localfetcher#1] reduce.LocalFetcher (LocalFetcher.java:copyMapOutput(140)) – localfetcher#1 about to shuffle output of map attempt_local1764589720_0001_m_000000_0 decomp: 1832 len: 1836 to MEMORY
2014-12-16 15:34:04,548 INFO [localfetcher#1] reduce.InMemoryMapOutput (InMemoryMapOutput.java:shuffle(100)) – Read 1832 bytes from map-output for attempt_local1764589720_0001_m_000000_0
2014-12-16 15:34:04,553 INFO [localfetcher#1] reduce.MergeManagerImpl (MergeManagerImpl.java:closeInMemoryFile(307)) – closeInMemoryFile -> map-output of size: 1832, inMemoryMapOutputs.size() -> 1, commitMemory -> 0, usedMemory ->1832
2014-12-16 15:34:04,564 INFO [EventFetcher for fetching Map Completion Events] reduce.EventFetcher (EventFetcher.java:run(76)) – EventFetcher is interrupted.. Returning
2014-12-16 15:34:04,566 INFO [pool-6-thread-1] mapred.LocalJobRunner (LocalJobRunner.java:statusUpdate(591)) – 1 / 1 copied.
2014-12-16 15:34:04,566 INFO [pool-6-thread-1] reduce.MergeManagerImpl (MergeManagerImpl.java:finalMerge(667)) – finalMerge called with 1 in-memory map-outputs and 0 on-disk map-outputs
2014-12-16 15:34:04,585 INFO [pool-6-thread-1] mapred.Merger (Merger.java:merge(589)) – Merging 1 sorted segments
2014-12-16 15:34:04,585 INFO [pool-6-thread-1] mapred.Merger (Merger.java:merge(688)) – Down to the last merge-pass, with 1 segments left of total size: 1823 bytes
2014-12-16 15:34:04,605 INFO [pool-6-thread-1] reduce.MergeManagerImpl (MergeManagerImpl.java:finalMerge(742)) – Merged 1 segments, 1832 bytes to disk to satisfy reduce memory limit
2014-12-16 15:34:04,605 INFO [pool-6-thread-1] reduce.MergeManagerImpl (MergeManagerImpl.java:finalMerge(772)) – Merging 1 files, 1836 bytes from disk
2014-12-16 15:34:04,606 INFO [pool-6-thread-1] reduce.MergeManagerImpl (MergeManagerImpl.java:finalMerge(787)) – Merging 0 segments, 0 bytes from memory into reduce
2014-12-16 15:34:04,607 INFO [pool-6-thread-1] mapred.Merger (Merger.java:merge(589)) – Merging 1 sorted segments
2014-12-16 15:34:04,608 INFO [pool-6-thread-1] mapred.Merger (Merger.java:merge(688)) – Down to the last merge-pass, with 1 segments left of total size: 1823 bytes
2014-12-16 15:34:04,608 INFO [pool-6-thread-1] mapred.LocalJobRunner (LocalJobRunner.java:statusUpdate(591)) – 1 / 1 copied.
2014-12-16 15:34:04,643 INFO [pool-6-thread-1] Configuration.deprecation (Configuration.java:warnOnceIfDeprecated(996)) – mapred.skip.on is deprecated. Instead, use mapreduce.job.skiprecords
2014-12-16 15:34:04,714 INFO [main] mapreduce.Job (Job.java:monitorAndPrintJob(1362)) – map 100% reduce 0%
2014-12-16 15:34:04,842 INFO [pool-6-thread-1] mapred.Task (Task.java:done(995)) – Task:attempt_local1764589720_0001_r_000000_0 is done. And is in the process of committing
2014-12-16 15:34:04,850 INFO [pool-6-thread-1] mapred.LocalJobRunner (LocalJobRunner.java:statusUpdate(591)) – 1 / 1 copied.
2014-12-16 15:34:04,850 INFO [pool-6-thread-1] mapred.Task (Task.java:commit(1156)) – Task attempt_local1764589720_0001_r_000000_0 is allowed to commit now
2014-12-16 15:34:04,881 INFO [pool-6-thread-1] output.FileOutputCommitter (FileOutputCommitter.java:commitTask(439)) – Saved output of task ‘attempt_local1764589720_0001_r_000000_0’ to hdfs://192.168.52.128:9000/data/output/_temporary/0/task_local1764589720_0001_r_000000
2014-12-16 15:34:04,884 INFO [pool-6-thread-1] mapred.LocalJobRunner (LocalJobRunner.java:statusUpdate(591)) – reduce > reduce
2014-12-16 15:34:04,884 INFO [pool-6-thread-1] mapred.Task (Task.java:sendDone(1115)) – Task ‘attempt_local1764589720_0001_r_000000_0’ done.
2014-12-16 15:34:04,885 INFO [pool-6-thread-1] mapred.LocalJobRunner (LocalJobRunner.java:run(325)) – Finishing task: attempt_local1764589720_0001_r_000000_0
2014-12-16 15:34:04,885 INFO [Thread-4] mapred.LocalJobRunner (LocalJobRunner.java:runTasks(456)) – reduce task executor complete.
2014-12-16 15:34:05,714 INFO [main] mapreduce.Job (Job.java:monitorAndPrintJob(1362)) – map 100% reduce 100%
2014-12-16 15:34:05,714 INFO [main] mapreduce.Job (Job.java:monitorAndPrintJob(1373)) – Job job_local1764589720_0001 completed successfully
2014-12-16 15:34:05,733 INFO [main] mapreduce.Job (Job.java:monitorAndPrintJob(1380)) – Counters: 38
File System Counters
FILE: Number of bytes read=34542
FILE: Number of bytes written=470650
FILE: Number of read operations=0
FILE: Number of large read operations=0
FILE: Number of write operations=0
HDFS: Number of bytes read=2732
HDFS: Number of bytes written=1306
HDFS: Number of read operations=15
HDFS: Number of large read operations=0
HDFS: Number of write operations=4
Map-Reduce Framework
Map input records=31
Map output records=179
Map output bytes=2055
Map output materialized bytes=1836
Input split bytes=113
Combine input records=179
Combine output records=131
Reduce input groups=131
Reduce shuffle bytes=1836
Reduce input records=131
Reduce output records=131
Spilled Records=262
Shuffled Maps =1
Failed Shuffles=0
Merged Map outputs=1
GC time elapsed (ms)=13
CPU time spent (ms)=0
Physical memory (bytes) snapshot=0
Virtual memory (bytes) snapshot=0
Total committed heap usage (bytes)=440664064
Shuffle Errors
BAD_ID=0
CONNECTION=0
IO_ERROR=0
WRONG_LENGTH=0
WRONG_MAP=0
WRONG_REDUCE=0
File Input Format Counters
Bytes Read=1366
File Output Format Counters
Bytes Written=1306
Hadoop2.5.2 新特性 http://www.linuxidc.com/Linux/2014-11/109814.htm
CentOS 安装和配置 Hadoop2.2.0 http://www.linuxidc.com/Linux/2014-01/94685.htm
Ubuntu 13.04 上搭建 Hadoop 环境 http://www.linuxidc.com/Linux/2013-06/86106.htm
Ubuntu 12.10 +Hadoop 1.2.1 版本集群配置 http://www.linuxidc.com/Linux/2013-09/90600.htm
Ubuntu 上搭建 Hadoop 环境（单机模式 + 伪分布模式）http://www.linuxidc.com/Linux/2013-01/77681.htm
Ubuntu 下 Hadoop 环境的配置 http://www.linuxidc.com/Linux/2012-11/74539.htm
单机版搭建 Hadoop 环境图文教程详解 http://www.linuxidc.com/Linux/2012-02/53927.htm
搭建 Hadoop 环境（在 Winodws 环境下用虚拟机虚拟两个 Ubuntu 系统进行搭建）http://www.linuxidc.com/Linux/2011-12/48894.htm
