Map Reduce Program中的问题

时间：2015-06-20 14:20:04

标签： hadoop mapreduce

我正在使用Putty执行一个hadoop Map-Reduce Job来解决简单的单词计数问题。 我已经在VM上配置了Hadoop，并且我已经验证了Hadoop的所有组件都在使用jps运行。

当我使用命令执行代码时 hadoop jar Untitled.jar

我收到错误

15/06/20 19:36:48 WARN mapred.JobClient: Use GenericOptionsParser for parsing the arguments. Applications should implement Tool for the same.
15/06/20 19:37:09 INFO util.NativeCodeLoader: Loaded the native-hadoop library
15/06/20 19:37:09 WARN snappy.LoadSnappy: Snappy native library not loaded
15/06/20 19:37:09 INFO mapred.FileInputFormat: Total input paths to process : 0
15/06/20 19:37:10 INFO mapred.JobClient: Running job: job_201506201820_0004
15/06/20 19:37:11 INFO mapred.JobClient:  map 0% reduce 0%
15/06/20 19:37:12 INFO mapred.JobClient: Task Id : attempt_201506201820_0004_m_000001_0, Status : FAILED
Error initializing attempt_201506201820_0004_m_000001_0:
ENOENT: No such file or directory
        at org.apache.hadoop.io.nativeio.NativeIO.chmod(Native Method)
        at org.apache.hadoop.fs.FileUtil.execSetPermission(FileUtil.java:701)
        at org.apache.hadoop.fs.FileUtil.setPermission(FileUtil.java:656)
        at org.apache.hadoop.fs.RawLocalFileSystem.setPermission(RawLocalFileSystem.java:514)
        at org.apache.hadoop.fs.RawLocalFileSystem.mkdirs(RawLocalFileSystem.java:349)
        at org.apache.hadoop.mapred.JobLocalizer.initializeJobLogDir(JobLocalizer.java:240)
        at org.apache.hadoop.mapred.DefaultTaskController.initializeJob(DefaultTaskController.java:205)
        at org.apache.hadoop.mapred.TaskTracker$4.run(TaskTracker.java:1336)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:422)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1190)
        at org.apache.hadoop.mapred.TaskTracker.initializeJob(TaskTracker.java:1311)
        at org.apache.hadoop.mapred.TaskTracker.localizeJob(TaskTracker.java:1226)
        at org.apache.hadoop.mapred.TaskTracker$5.run(TaskTracker.java:2603)
        at java.lang.Thread.run(Thread.java:745)

15/06/20 19:37:13 WARN mapred.JobClient: Error reading task outputhttp://ankit-VirtualBox:50060/tasklog?plaintext=true&attemptid=attempt_201506201820_0004_m_000001_0&filter=stdout
15/06/20 19:37:13 WARN mapred.JobClient: Error reading task outputhttp://ankit-VirtualBox:50060/tasklog?plaintext=true&attemptid=attempt_201506201820_0004_m_000001_0&filter=stderr
15/06/20 19:37:14 INFO mapred.JobClient: Task Id : attempt_201506201820_0004_m_000001_1, Status : FAILED
Error initializing attempt_201506201820_0004_m_000001_1:
ENOENT: No such file or directory
        at org.apache.hadoop.io.nativeio.NativeIO.chmod(Native Method)
        at org.apache.hadoop.fs.FileUtil.execSetPermission(FileUtil.java:701)
        at org.apache.hadoop.fs.FileUtil.setPermission(FileUtil.java:656)
        at org.apache.hadoop.fs.RawLocalFileSystem.setPermission(RawLocalFileSystem.java:514)
        at org.apache.hadoop.fs.RawLocalFileSystem.mkdirs(RawLocalFileSystem.java:349)
        at org.apache.hadoop.mapred.JobLocalizer.initializeJobLogDir(JobLocalizer.java:240)
        at org.apache.hadoop.mapred.DefaultTaskController.initializeJob(DefaultTaskController.java:205)
        at org.apache.hadoop.mapred.TaskTracker$4.run(TaskTracker.java:1336)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:422)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1190)
        at org.apache.hadoop.mapred.TaskTracker.initializeJob(TaskTracker.java:1311)
        at org.apache.hadoop.mapred.TaskTracker.localizeJob(TaskTracker.java:1226)
        at org.apache.hadoop.mapred.TaskTracker$5.run(TaskTracker.java:2603)
        at java.lang.Thread.run(Thread.java:745)

15/06/20 19:37:15 WARN mapred.JobClient: Error reading task outputhttp://ankit-VirtualBox:50060/tasklog?plaintext=true&attemptid=attempt_201506201820_0004_m_000001_1&filter=stdout
15/06/20 19:37:15 WARN mapred.JobClient: Error reading task outputhttp://ankit-VirtualBox:50060/tasklog?plaintext=true&attemptid=attempt_201506201820_0004_m_000001_1&filter=stderr
15/06/20 19:37:16 INFO mapred.JobClient: Task Id : attempt_201506201820_0004_m_000001_2, Status : FAILED
15/06/20 19:37:16 WARN mapred.JobClient: Error reading task outputhttp://ankit-VirtualBox:50060/tasklog?plaintext=true&attemptid=attempt_201506201820_0004_m_000001_2&filter=stdout
15/06/20 19:37:16 WARN mapred.JobClient: Error reading task outputhttp://ankit-VirtualBox:50060/tasklog?plaintext=true&attemptid=attempt_201506201820_0004_m_000001_2&filter=stderr
15/06/20 19:37:17 INFO mapred.JobClient: Task Id : attempt_201506201820_0004_m_000000_0, Status : FAILED
Error initializing attempt_201506201820_0004_m_000000_0:
ENOENT: No such file or directory
        at org.apache.hadoop.io.nativeio.NativeIO.chmod(Native Method)
        at org.apache.hadoop.fs.FileUtil.execSetPermission(FileUtil.java:701)
        at org.apache.hadoop.fs.FileUtil.setPermission(FileUtil.java:656)
        at org.apache.hadoop.fs.RawLocalFileSystem.setPermission(RawLocalFileSystem.java:514)
        at org.apache.hadoop.fs.RawLocalFileSystem.mkdirs(RawLocalFileSystem.java:349)
        at org.apache.hadoop.mapred.JobLocalizer.initializeJobLogDir(JobLocalizer.java:240)
        at org.apache.hadoop.mapred.DefaultTaskController.initializeJob(DefaultTaskController.java:205)
        at org.apache.hadoop.mapred.TaskTracker$4.run(TaskTracker.java:1336)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:422)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1190)
        at org.apache.hadoop.mapred.TaskTracker.initializeJob(TaskTracker.java:1311)
        at org.apache.hadoop.mapred.TaskTracker.localizeJob(TaskTracker.java:1226)
        at org.apache.hadoop.mapred.TaskTracker$5.run(TaskTracker.java:2603)
        at java.lang.Thread.run(Thread.java:745)

15/06/20 19:37:17 WARN mapred.JobClient: Error reading task outputhttp://ankit-VirtualBox:50060/tasklog?plaintext=true&attemptid=attempt_201506201820_0004_m_000000_0&filter=stdout
15/06/20 19:37:17 WARN mapred.JobClient: Error reading task outputhttp://ankit-VirtualBox:50060/tasklog?plaintext=true&attemptid=attempt_201506201820_0004_m_000000_0&filter=stderr
15/06/20 19:37:18 INFO mapred.JobClient: Task Id : attempt_201506201820_0004_m_000000_1, Status : FAILED
Error initializing attempt_201506201820_0004_m_000000_1:
ENOENT: No such file or directory
        at org.apache.hadoop.io.nativeio.NativeIO.chmod(Native Method)
        at org.apache.hadoop.fs.FileUtil.execSetPermission(FileUtil.java:701)
        at org.apache.hadoop.fs.FileUtil.setPermission(FileUtil.java:656)
        at org.apache.hadoop.fs.RawLocalFileSystem.setPermission(RawLocalFileSystem.java:514)
        at org.apache.hadoop.fs.RawLocalFileSystem.mkdirs(RawLocalFileSystem.java:349)
        at org.apache.hadoop.mapred.JobLocalizer.initializeJobLogDir(JobLocalizer.java:240)
        at org.apache.hadoop.mapred.DefaultTaskController.initializeJob(DefaultTaskController.java:205)
        at org.apache.hadoop.mapred.TaskTracker$4.run(TaskTracker.java:1336)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:422)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1190)
        at org.apache.hadoop.mapred.TaskTracker.initializeJob(TaskTracker.java:1311)
        at org.apache.hadoop.mapred.TaskTracker.localizeJob(TaskTracker.java:1226)
        at org.apache.hadoop.mapred.TaskTracker$5.run(TaskTracker.java:2603)
        at java.lang.Thread.run(Thread.java:745)

15/06/20 19:37:19 WARN mapred.JobClient: Error reading task outputhttp://ankit-VirtualBox:50060/tasklog?plaintext=true&attemptid=attempt_201506201820_0004_m_000000_1&filter=stdout
15/06/20 19:37:19 WARN mapred.JobClient: Error reading task outputhttp://ankit-VirtualBox:50060/tasklog?plaintext=true&attemptid=attempt_201506201820_0004_m_000000_1&filter=stderr
15/06/20 19:37:20 INFO mapred.JobClient: Task Id : attempt_201506201820_0004_m_000000_2, Status : FAILED
Error initializing attempt_201506201820_0004_m_000000_2:
ENOENT: No such file or directory
        at org.apache.hadoop.io.nativeio.NativeIO.chmod(Native Method)
        at org.apache.hadoop.fs.FileUtil.execSetPermission(FileUtil.java:701)
        at org.apache.hadoop.fs.FileUtil.setPermission(FileUtil.java:656)
        at org.apache.hadoop.fs.RawLocalFileSystem.setPermission(RawLocalFileSystem.java:514)
        at org.apache.hadoop.fs.RawLocalFileSystem.mkdirs(RawLocalFileSystem.java:349)
        at org.apache.hadoop.mapred.JobLocalizer.initializeJobLogDir(JobLocalizer.java:240)
        at org.apache.hadoop.mapred.DefaultTaskController.initializeJob(DefaultTaskController.java:205)
        at org.apache.hadoop.mapred.TaskTracker$4.run(TaskTracker.java:1336)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:422)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1190)
        at org.apache.hadoop.mapred.TaskTracker.initializeJob(TaskTracker.java:1311)
        at org.apache.hadoop.mapred.TaskTracker.localizeJob(TaskTracker.java:1226)
        at org.apache.hadoop.mapred.TaskTracker$5.run(TaskTracker.java:2603)
        at java.lang.Thread.run(Thread.java:745)

15/06/20 19:37:20 WARN mapred.JobClient: Error reading task outputhttp://ankit-VirtualBox:50060/tasklog?plaintext=true&attemptid=attempt_201506201820_0004_m_000000_2&filter=stdout
15/06/20 19:37:20 WARN mapred.JobClient: Error reading task outputhttp://ankit-VirtualBox:50060/tasklog?plaintext=true&attemptid=attempt_201506201820_0004_m_000000_2&filter=stderr
15/06/20 19:37:21 INFO mapred.JobClient: Job complete: job_201506201820_0004
15/06/20 19:37:21 INFO mapred.JobClient: Counters: 4
15/06/20 19:37:21 INFO mapred.JobClient:   Job Counters
15/06/20 19:37:21 INFO mapred.JobClient:     SLOTS_MILLIS_REDUCES=0
15/06/20 19:37:21 INFO mapred.JobClient:     Total time spent by all reduces waiting after reserving slots (ms)=0
15/06/20 19:37:21 INFO mapred.JobClient:     SLOTS_MILLIS_MAPS=0
15/06/20 19:37:21 INFO mapred.JobClient:     Total time spent by all maps waiting after reserving slots (ms)=0
15/06/20 19:37:21 INFO mapred.JobClient: Job Failed: JobCleanup Task Failure, Task: task_201506201820_0004_m_000000
java.io.IOException: Job failed!
        at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:1357)
        at WordCount.main(WordCount.java:32)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:483)
        at org.apache.hadoop.util.RunJar.main(RunJar.java:160)

我错过了什么。

2 个答案:

答案 0 :(得分：1)

您似乎没有提供任何输入路径。看看错误：

15/06/20 19:37:09 INFO mapred.FileInputFormat：要处理的总输入路径：0

答案 1 :(得分：0)

从日志中，您可以看到第一次执行地图时出现的问题，对于map和reduce进程都是0％。接下来是实际错误。 “没有这样的文件”。我们处理map reduce和file的唯一一次是输入和输出。鉴于我们处于地图流程的开始，我认为问题可能在于输入路径及其权限。请仔细研究一下。在运行作业之前，不应存在输出目录。它创造了我想。快乐的编码

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