大佬教程收集整理的这篇文章主要介绍了windows-7 – Windows 7上的Hadoop单节点安装，大佬教程大佬觉得挺不错的，现在分享给大家，也给大家做个参考。
我的问题是双重的 – 一个是关于安装本身的完整性,另一个是关于示例字数统计程序的reduce阶段中的错误.
我的安装步骤如下：
我正在关注http://blog.benhall.me.uk/2011/01/installing-hadoop-0210-on-windows.html的安装程序.
我已经在我的localhost上安装了cygwin并设置了无密码的ssh
我的java版本是：
java version "1.7.0_02" Java(TM) SE Runtime Environment (build 1.7.0_02-b13) Java HotSpot(TM) 64-Bit Server VM (build 22.0-b10,mixed modE)
conf / core-site.xml的内容：
<configuration> <property> <name>fs.default.name</name> <value>hdfs://localhost:9000</value> </property> </configuration>
conf / hdfs-site.xml的内容：
<configuration> <property> <name>dfs.Replication</name> <value>1</value> </property> </configuration>
conf / mapred-site.xml的内容：
<configuration> <property> <name>mapred.job.tracker</name> <value>localhost:9001</value> </property> </configuration>
我设置了JAVA_HOME变量,命令“hadoop version”打印0.20.2
hadoop namenode -format创建没有任何错误的DFS
start-all.sh打印出namenode,secondarynamenode,datanode,jobtracker和tasktracker都已启动.
但是,命令“jps”打印：
$jps 4584 Jps 11008 JobTracker 2084 NameNode
我注意到jps打印了tasktracker,secondarynamenode的pids’.
我能够查看输出
http://localhost:50030 for the jobtracker,http://localhost:50060 for the tasktracker and http://localhost:50070 for the namenode.
我尝试了put和get命令到hdfs并且它们都成功了：
bin/hadoop fs -mkdir In bin/hadoop fs -put *.txt In mkdir temp bin/hadoop fs -get In temp ls -l temp/In $ls -l temp/In/ @R_343_10586@l 365 348624 Mar 24 23:59 CHANGEs.txt 13366 Mar 24 23:59 LICENSE.txt 101 Mar 24 23:59 NOTICE.txt 1366 Mar 24 23:59 README.txt
我也可以通过http接口浏览DFS来查看这些文件的namenode
>我的安装完成了吗？
>如果是,为什么jps命令不显示所有五个组件的pids？
>如果没有,那么,我需要完成安装的步骤是什么？
>用于测试安装完整性的其他健全性检查是什么？
我最初认为我的安装完成并运行了一个示例WordCount map-reduce程序,沿着http://jayant7k.blogspot.com/2010/06/writing-your-first-map-reduce-program.html行
我获得以下输出：
12/03/25 00:10:26 WARN mapred.JobClient: Use GenericOptionsParser for parsing the arguments. Applications should implement Tool for the same. 12/03/25 00:10:26 INFO input.FileInputFormat: @R_343_10586@l input paths to process : 1 12/03/25 00:10:27 INFO mapred.JobClient: Running job: job_201203242348_0001 12/03/25 00:10:28 INFO mapred.JobClient: map 0% reduce 0% 12/03/25 00:10:35 INFO mapred.JobClient: map 100% reduce 0% 12/03/25 00:21:29 INFO mapred.JobClient: Task Id : attempt_201203242348_0001_r_0 00000_0,Status : Failed Shuffle Error: Exceeded MAX_Failed_UNIQUE_FETCHES; bailing-out. 12/03/25 00:32:25 INFO mapred.JobClient: Task Id : attempt_201203242348_0001_r_0 00000_1,Status : Failed Shuffle Error: Exceeded MAX_Failed_UNIQUE_FETCHES; bailing-out. 12/03/25 00:44:02 INFO mapred.JobClient: Task Id : attempt_201203242348_0001_r_0 00000_2,Status : Failed Shuffle Error: Exceeded MAX_Failed_UNIQUE_FETCHES; bailing-out. 12/03/25 00:55:00 INFO mapred.JobClient: Job complete: job_201203242348_0001 12/03/25 00:55:00 INFO mapred.JobClient: Counters: 12 12/03/25 00:55:00 INFO mapred.JobClient: Job Counters 12/03/25 00:55:00 INFO mapred.JobClient: Launched reduce tasks=4 12/03/25 00:55:00 INFO mapred.JobClient: Launched map tasks=1 12/03/25 00:55:00 INFO mapred.JobClient: Data-local map tasks=1 12/03/25 00:55:00 INFO mapred.JobClient: Failed reduce tasks=1 12/03/25 00:55:00 INFO mapred.JobClient: FileSystemCounters 12/03/25 00:55:00 INFO mapred.JobClient: HDFS_BYTES_READ=13366 12/03/25 00:55:00 INFO mapred.JobClient: FILE_BYTES_WRITTEN=23511 12/03/25 00:55:00 INFO mapred.JobClient: Map-Reduce Framework 12/03/25 00:55:00 INFO mapred.JobClient: Combine output records=0 12/03/25 00:55:00 INFO mapred.JobClient: Map input records=244 12/03/25 00:55:00 INFO mapred.JobClient: Spilled Records=1887 12/03/25 00:55:00 INFO mapred.JobClient: Map output bytes=19699 12/03/25 00:55:00 INFO mapred.JobClient: Combine input records=0 12/03/25 00:55:00 INFO mapred.JobClient: Map output records=1887@H_147_19@map任务似乎已完成,但reduce任务在日志中显示以下错误：
2012-03-25 00:10:35,202 INFO org.apache.hadoop.mapred.ReduCETask: attempt_201203242348_0001_r_000000_0: Got 1 new map-outputs 2012-03-25 00:10:40,193 INFO org.apache.hadoop.mapred.ReduCETask: attempt_201203242348_0001_r_000000_0 scheduled 1 outputs (0 slow hosts and0 dup hosts) 2012-03-25 00:10:40,243 INFO org.apache.hadoop.mapred.ReduCETask: header: attempt_201203242348_0001_m_000000_0,compressed len: 23479,decompressed len: 23475 2012-03-25 00:10:40,243 INFO org.apache.hadoop.mapred.ReduCETask: Shuffling 23475 bytes (23479 raw bytes) into RAM from attempt_201203242348_0001_m_000000_0 2012-03-25 00:11:35,194 INFO org.apache.hadoop.mapred.ReduCETask: attempt_201203242348_0001_r_000000_0 Need another 1 map output(s) where 1 is already in progress 2012-03-25 00:11:35,194 INFO org.apache.hadoop.mapred.ReduCETask: attempt_201203242348_0001_r_000000_0 scheduled 0 outputs (0 slow hosts and0 dup hosts) 2012-03-25 00:12:35,197 INFO org.apache.hadoop.mapred.ReduCETask: attempt_201203242348_0001_r_000000_0 Need another 1 map output(s) where 1 is already in progress 2012-03-25 00:12:35,197 INFO org.apache.hadoop.mapred.ReduCETask: attempt_201203242348_0001_r_000000_0 scheduled 0 outputs (0 slow hosts and0 dup hosts) 2012-03-25 00:13:35,202 INFO org.apache.hadoop.mapred.ReduCETask: attempt_201203242348_0001_r_000000_0 Need another 1 map output(s) where 1 is already in progress 2012-03-25 00:13:35,202 INFO org.apache.hadoop.mapred.ReduCETask: attempt_201203242348_0001_r_000000_0 scheduled 0 outputs (0 slow hosts and0 dup hosts) 2012-03-25 00:13:40,249 INFO org.apache.hadoop.mapred.ReduCETask: Failed to shuffle from attempt_201203242348_0001_m_000000_0 java.net.socketTimeoutException: Read timed out at java.net.sockeTinputStream.socketRead0(Native Method) at java.net.sockeTinputStream.read(SockeTinputStream.java:150) at java.net.sockeTinputStream.read(SockeTinputStream.java:121) at java.io.bufferedInputStream.fill(BufferedInputStream.java:235) at java.io.bufferedInputStream.read1(BufferedInputStream.java:275) at java.io.bufferedInputStream.read(BufferedInputStream.java:334) at sun.net.www.http.ChunkedInputStream.fastRead(ChunkedInputStream.java:239) at sun.net.www.http.ChunkedInputStream.read(ChunkedInputStream.java:680) at java.io.FilterInputStream.read(FilterInputStream.java:133) at sun.net.www.protocol.http.httpURLConnection$httpInputStream.read(httpURLConnection.java:2959) at org.apache.hadoop.mapred.IFileInputStream.doRead(IFileInputStream.java:149) at org.apache.hadoop.mapred.IFileInputStream.read(IFileInputStream.java:101) at org.apache.hadoop.mapred.ReduCETask$ReduceCopier$MapOutputCopier.shuffleInMemory(ReduCETask.java:1522) at org.apache.hadoop.mapred.ReduCETask$ReduceCopier$MapOutputCopier.getMapOutput(ReduCETask.java:1408) at org.apache.hadoop.mapred.ReduCETask$ReduceCopier$MapOutputCopier.copyOutput(ReduCETask.java:1261) at org.apache.hadoop.mapred.ReduCETask$ReduceCopier$MapOutputCopier.run(ReduCETask.java:1195)
以下是任务跟踪器日志的内容：
2012-03-25 00:10:27,910 INFO org.apache.hadoop.mapred.TaskTracker: LaunchTaskAction (registerTask): attempt_201203242348_0001_m_000002_0 task's state:UNASSIGNED 2012-03-25 00:10:27,915 INFO org.apache.hadoop.mapred.TaskTracker: Trying to launch : attempt_201203242348_0001_m_000002_0 2012-03-25 00:10:27,915 INFO org.apache.hadoop.mapred.TaskTracker: In TaskLauncher,current free slots : 2 and trying to launch attempt_201203242348_0001_m_000002_0 2012-03-25 00:10:28,453 INFO org.apache.hadoop.mapred.JvmManager: In JvmRunner constructed JVM ID: jvm_201203242348_0001_m_625085452 2012-03-25 00:10:28,454 INFO org.apache.hadoop.mapred.JvmManager: JVM Runner jvm_201203242348_0001_m_625085452 spawned. 2012-03-25 00:10:29,217 INFO org.apache.hadoop.mapred.TaskTracker: JVM with ID: jvm_201203242348_0001_m_625085452 given task: attempt_201203242348_0001_m_000002_0 2012-03-25 00:10:29,523 INFO org.apache.hadoop.mapred.TaskTracker: attempt_201203242348_0001_m_000002_0 0.0% setup 2012-03-25 00:10:29,524 INFO org.apache.hadoop.mapred.TaskTracker: Task attempt_201203242348_0001_m_000002_0 is done. 2012-03-25 00:10:29,524 INFO org.apache.hadoop.mapred.TaskTracker: reported output size for attempt_201203242348_0001_m_000002_0 was 0 2012-03-25 00:10:29,526 INFO org.apache.hadoop.mapred.TaskTracker: addFreeSlot : current free slots : 2 2012-03-25 00:10:29,718 INFO org.apache.hadoop.mapred.JvmManager: JVM : jvm_201203242348_0001_m_625085452 exited. number of tasks it ran: 1 2012-03-25 00:10:30,911 INFO org.apache.hadoop.mapred.TaskTracker: org.apache.hadoop.util.Diskchecker$DiskErrorException: Could not find taskTracker/jobcache/job_201203242348_0001/attempt_201203242348_0001_m_000002_0/output/file.out in any of the configured local directories 2012-03-25 00:10:30,952 INFO org.apache.hadoop.mapred.TaskTracker: LaunchTaskAction (registerTask): attempt_201203242348_0001_m_000000_0 task's state:UNASSIGNED 2012-03-25 00:10:30,952 INFO org.apache.hadoop.mapred.TaskTracker: Trying to launch : attempt_201203242348_0001_m_000000_0 2012-03-25 00:10:30,952 INFO org.apache.hadoop.mapred.TaskTracker: In TaskLauncher,current free slots : 2 and trying to launch attempt_201203242348_0001_m_000000_0 2012-03-25 00:10:30,952 INFO org.apache.hadoop.mapred.TaskTracker: Received KillTaskAction for task: attempt_201203242348_0001_m_000002_0 2012-03-25 00:10:30,952 INFO org.apache.hadoop.mapred.TaskTracker: About to purge task: attempt_201203242348_0001_m_000002_0 2012-03-25 00:10:30,952 INFO org.apache.hadoop.mapred.TaskRunner: attempt_201203242348_0001_m_000002_0 done; removing files. 2012-03-25 00:10:30,952 INFO org.apache.hadoop.mapred.IndexCache: Map ID attempt_201203242348_0001_m_000002_0 not found in cache 2012-03-25 00:10:31,077 INFO org.apache.hadoop.mapred.JvmManager: In JvmRunner constructed JVM ID: jvm_201203242348_0001_m_-1399302881 2012-03-25 00:10:31,077 INFO org.apache.hadoop.mapred.JvmManager: JVM Runner jvm_201203242348_0001_m_-1399302881 spawned. 2012-03-25 00:10:31,812 INFO org.apache.hadoop.mapred.TaskTracker: JVM with ID: jvm_201203242348_0001_m_-1399302881 given task: attempt_201203242348_0001_m_000000_0 2012-03-25 00:10:32,642 INFO org.apache.hadoop.mapred.TaskTracker: attempt_201203242348_0001_m_000000_0 1.0% 2012-03-25 00:10:32,642 INFO org.apache.hadoop.mapred.TaskTracker: Task attempt_201203242348_0001_m_000000_0 is done. 2012-03-25 00:10:32,642 INFO org.apache.hadoop.mapred.TaskTracker: reported output size for attempt_201203242348_0001_m_000000_0 was 0 2012-03-25 00:10:32,642 INFO org.apache.hadoop.mapred.TaskTracker: addFreeSlot : current free slots : 2 2012-03-25 00:10:32,822 INFO org.apache.hadoop.mapred.JvmManager: JVM : jvm_201203242348_0001_m_-1399302881 exited. number of tasks it ran: 1 2012-03-25 00:10:33,982 INFO org.apache.hadoop.mapred.TaskTracker: LaunchTaskAction (registerTask): attempt_201203242348_0001_r_000000_0 task's state:UNASSIGNED 2012-03-25 00:10:33,982 INFO org.apache.hadoop.mapred.TaskTracker: Trying to launch : attempt_201203242348_0001_r_000000_0 2012-03-25 00:10:33,982 INFO org.apache.hadoop.mapred.TaskTracker: In TaskLauncher,current free slots : 2 and trying to launch attempt_201203242348_0001_r_000000_0 2012-03-25 00:10:34,057 INFO org.apache.hadoop.mapred.JvmManager: In JvmRunner constructed JVM ID: jvm_201203242348_0001_r_625085452 2012-03-25 00:10:34,057 INFO org.apache.hadoop.mapred.JvmManager: JVM Runner jvm_201203242348_0001_r_625085452 spawned. 2012-03-25 00:10:34,852 INFO org.apache.hadoop.mapred.TaskTracker: JVM with ID: jvm_201203242348_0001_r_625085452 given task: attempt_201203242348_0001_r_000000_0 2012-03-25 00:10:40,243 INFO org.apache.hadoop.mapred.TaskTracker: Sent out 23479 bytes for reduce: 0 from map: attempt_201203242348_0001_m_000000_0 given 23479/23475 2012-03-25 00:10:40,243 INFO org.apache.hadoop.mapred.TaskTracker.clienttrace: src: 192.168.1.33:50060,dest: 192.168.1.33:60790,bytes: 23479,op: MAPRED_SHUFFLE,cliID: attempt_201203242348_0001_m_000000_0 2012-03-25 00:10:41,153 INFO org.apache.hadoop.mapred.TaskTracker: attempt_201203242348_0001_r_000000_0 0.0% reduce > copy > 2012-03-25 00:10:44,158 INFO org.apache.hadoop.mapred.TaskTracker: attempt_201203242348_0001_r_000000_0 0.0% reduce > copy > 2012-03-25 00:16:05,244 INFO org.apache.hadoop.mapred.TaskTracker: Sent out 23479 bytes for reduce: 0 from map: attempt_201203242348_0001_m_000000_0 given 23479/23475 2012-03-25 00:16:05,244 INFO org.apache.hadoop.mapred.TaskTracker.clienttrace: src: 192.168.1.33:50060,dest: 192.168.1.33:60864,cliID: attempt_201203242348_0001_m_000000_0 2012-03-25 00:16:05,249 INFO org.apache.hadoop.mapred.TaskTracker: attempt_201203242348_0001_r_000000_0 0.0% reduce > copy > 2012-03-25 00:16:08,249 INFO org.apache.hadoop.mapred.TaskTracker: attempt_201203242348_0001_r_000000_0 0.0% reduce > copy > 2012-03-25 00:21:25,251 FATAL org.apache.hadoop.mapred.TaskTracker: Task: attempt_201203242348_0001_r_000000_0 - Killed due to Shuffle Failure: Exceeded MAX_Failed_UNIQUE_FETCHES; bailing-out.
我在Windows防火墙中打开了端口9000和9001
我检查了telnet输出以验证这些端口是否确实打开：
C:\Windows\system32>netstat -a -n | grep -e "500[367]0" TCP 0.0.0.0:50030 0.0.0.0:0 LISTENING TCP 0.0.0.0:50060 0.0.0.0:0 LISTENING TCP 0.0.0.0:50070 0.0.0.0:0 LISTENING TCP [::]:50030 [::]:0 LISTENING TCP [::]:50060 [::]:0 LISTENING TCP [::]:50070 [::]:0 LISTENING C:\Windows\system32>netstat -a -n | grep -e "900[01]" TCP 127.0.0.1:9000 0.0.0.0:0 LISTENING TCP 127.0.0.1:9000 127.0.0.1:60332 ESTABLISHED TCP 127.0.0.1:9000 127.0.0.1:60987 ESTABLISHED TCP 127.0.0.1:9001 0.0.0.0:0 LISTENING TCP 127.0.0.1:9001 127.0.0.1:60410 ESTABLISHED TCP 127.0.0.1:60332 127.0.0.1:9000 ESTABLISHED TCP 127.0.0.1:60410 127.0.0.1:9001 ESTABLISHED TCP 127.0.0.1:60987 127.0.0.1:9000 ESTABLISHED
你能帮忙解决安装问题和减少任务的问题吗？
我在看
http://wiki.apache.org/hadoop/SocketTimeout
和其他一些链接并尝试了建议,但没有任何成功.
感谢您耐心阅读本文,并很乐意提供更多详细信息.
提前致谢.
2012-03-25 00:10:30,911 INFO org.apache.hadoop.mapred.TaskTracker: org.apache.hadoop.util.Diskchecker$DiskErrorException: Could not find taskTracker/jobcache/job_201203242348_0001/attempt_201203242348_0001_m_000002_0/output/file.out in any of the configured local directories
我猜你需要检查hadoop.tmp.dir和mapred.local.dir.您提到了您正在使用的配置,因此这两个参数的值是默认值.这些参数的默认值为here.将它们设置到某个相关位置,然后重试.
注意：在您进行此更改之前,您需要停止hadoop并在完成后启动.
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