22020
Hadoop を学習中のものです。

現在 cloudera manager を用いてHadoop環境を導入しました。  
hdfs上にファイルを置くことができましたので、続いてMapReduceで処理を行いたいと思い実行したところでエラーが出てしまい困っております。  
お知恵を拝借できないでしょうか？

```

    sudo -u hdfs hadoop jar /opt/cloudera/parcels/CDH-5.5.1-1.cdh5.5.1.p0.11/lib/hadoop-mapreduce/hadoop-streaming.jar  -mapper "/tmp/map.rb" -reducer "/tmp/reduce.rb" -input /user/test.txt -output /user/output34.txt
    
```

を実行したところ下記のようなエラーになってしまいます。  
エラーログを見るところ、mapper がない？という表記が見られるのですが原因が分かりません。

もし、何か初歩的なことで躓いているようでしたらご教示頂けないでしょうか？  
ちなみにmapperとreducerの中身はよく例題にでてくるような内容です。

タグ区切りのkey,value(mapper) で key に対する最大のvalueを返す(reducer)内容です。

```

    16/02/12 07:02:24 INFO client.RMProxy: Connecting to ResourceManager at hadoop00/10.86.194.191:8032
    16/02/12 07:02:25 INFO client.RMProxy: Connecting to ResourceManager at hadoop00/10.86.194.191:8032
    16/02/12 07:02:26 INFO mapred.FileInputFormat: Total input paths to process : 1
    16/02/12 07:02:26 INFO mapreduce.JobSubmitter: number of splits:2
    16/02/12 07:02:26 INFO mapreduce.JobSubmitter: Submitting tokens for job: job_1455284930183_0020
    16/02/12 07:02:27 INFO impl.YarnClientImpl: Submitted application application_1455284930183_0020
    16/02/12 07:02:27 INFO mapreduce.Job: The url to track the job: http://hadoop00:8088/proxy/application_1455284930183_0020/
    16/02/12 07:02:27 INFO mapreduce.Job: Running job: job_1455284930183_0020
    16/02/12 07:02:36 INFO mapreduce.Job: Job job_1455284930183_0020 running in uber mode : false
    16/02/12 07:02:36 INFO mapreduce.Job:  map 0% reduce 0%
    16/02/12 07:02:42 INFO mapreduce.Job: Task Id : attempt_1455284930183_0020_m_000001_0, Status : FAILED
    Error: java.lang.RuntimeException: Error in configuring object
        at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:109)
        at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:75)
        at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:133)
        at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:449)
        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:343)
        at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:163)
        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:1671)
        at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)
    Caused by: java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:106)
        ... 9 more
    Caused by: java.lang.RuntimeException: Error in configuring object
        at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:109)
        at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:75)
        at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:133)
        at org.apache.hadoop.mapred.MapRunner.configure(MapRunner.java:38)
        ... 14 more
    Caused by: java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:106)
        ... 17 more
    Caused by: java.lang.RuntimeException: configuration exception
        at org.apache.hadoop.streaming.PipeMapRed.configure(PipeMapRed.java:221)
        at org.apache.hadoop.streaming.PipeMapper.configure(PipeMapper.java:66)
        ... 22 more
    Caused by: java.io.IOException: Cannot run program "/tmp/map.rb": error=2, No such file or directory
        at java.lang.ProcessBuilder.start(ProcessBuilder.java:1047)
        at org.apache.hadoop.streaming.PipeMapRed.configure(PipeMapRed.java:208)
        ... 23 more
    Caused by: java.io.IOException: error=2, No such file or directory
        at java.lang.UNIXProcess.forkAndExec(Native Method)
        at java.lang.UNIXProcess.<init>(UNIXProcess.java:186)
        at java.lang.ProcessImpl.start(ProcessImpl.java:130)
        at java.lang.ProcessBuilder.start(ProcessBuilder.java:1028)
        ... 24 more
    
    16/02/12 07:02:42 INFO mapreduce.Job: Task Id : attempt_1455284930183_0020_m_000000_0, Status : FAILED
    Error: java.lang.RuntimeException: Error in configuring object
        at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:109)
        at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:75)
        at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:133)
        at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:449)
        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:343)
        at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:163)
        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:1671)
        at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)
    Caused by: java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:106)
        ... 9 more
    Caused by: java.lang.RuntimeException: Error in configuring object
        at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:109)
        at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:75)
        at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:133)
        at org.apache.hadoop.mapred.MapRunner.configure(MapRunner.java:38)
        ... 14 more
    Caused by: java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:106)
        ... 17 more
    Caused by: java.lang.RuntimeException: configuration exception
        at org.apache.hadoop.streaming.PipeMapRed.configure(PipeMapRed.java:221)
        at org.apache.hadoop.streaming.PipeMapper.configure(PipeMapper.java:66)
        ... 22 more
    Caused by: java.io.IOException: Cannot run program "/tmp/map.rb": error=2, No such file or directory
        at java.lang.ProcessBuilder.start(ProcessBuilder.java:1047)
        at org.apache.hadoop.streaming.PipeMapRed.configure(PipeMapRed.java:208)
        ... 23 more
    Caused by: java.io.IOException: error=2, No such file or directory
        at java.lang.UNIXProcess.forkAndExec(Native Method)
        at java.lang.UNIXProcess.<init>(UNIXProcess.java:186)
        at java.lang.ProcessImpl.start(ProcessImpl.java:130)
        at java.lang.ProcessBuilder.start(ProcessBuilder.java:1028)
        ... 24 more
    
    16/02/12 07:02:49 INFO mapreduce.Job: Task Id : attempt_1455284930183_0020_m_000000_1, Status : FAILED
    Error: java.lang.RuntimeException: Error in configuring object
        at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:109)
        at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:75)
        at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:133)
        at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:449)
        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:343)
        at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:163)
        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:1671)
        at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)
    Caused by: java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:106)
        ... 9 more
    Caused by: java.lang.RuntimeException: Error in configuring object
        at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:109)
        at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:75)
        at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:133)
        at org.apache.hadoop.mapred.MapRunner.configure(MapRunner.java:38)
        ... 14 more
    Caused by: java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:106)
        ... 17 more
    Caused by: java.lang.RuntimeException: configuration exception
        at org.apache.hadoop.streaming.PipeMapRed.configure(PipeMapRed.java:221)
        at org.apache.hadoop.streaming.PipeMapper.configure(PipeMapper.java:66)
        ... 22 more
    Caused by: java.io.IOException: Cannot run program "/tmp/map.rb": error=2, No such file or directory
        at java.lang.ProcessBuilder.start(ProcessBuilder.java:1047)
        at org.apache.hadoop.streaming.PipeMapRed.configure(PipeMapRed.java:208)
        ... 23 more
    Caused by: java.io.IOException: error=2, No such file or directory
        at java.lang.UNIXProcess.forkAndExec(Native Method)
        at java.lang.UNIXProcess.<init>(UNIXProcess.java:186)
        at java.lang.ProcessImpl.start(ProcessImpl.java:130)
        at java.lang.ProcessBuilder.start(ProcessBuilder.java:1028)
        ... 24 more
    
    16/02/12 07:02:49 INFO mapreduce.Job: Task Id : attempt_1455284930183_0020_m_000001_1, Status : FAILED
    Error: java.lang.RuntimeException: Error in configuring object
        at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:109)
        at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:75)
        at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:133)
        at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:449)
        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:343)
        at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:163)
        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:1671)
        at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)
    Caused by: java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:106)
        ... 9 more
    Caused by: java.lang.RuntimeException: Error in configuring object
        at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:109)
        at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:75)
        at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:133)
        at org.apache.hadoop.mapred.MapRunner.configure(MapRunner.java:38)
        ... 14 more
    Caused by: java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:106)
        ... 17 more
    Caused by: java.lang.RuntimeException: configuration exception
        at org.apache.hadoop.streaming.PipeMapRed.configure(PipeMapRed.java:221)
        at org.apache.hadoop.streaming.PipeMapper.configure(PipeMapper.java:66)
        ... 22 more
    Caused by: java.io.IOException: Cannot run program "/tmp/map.rb": error=2, No such file or directory
        at java.lang.ProcessBuilder.start(ProcessBuilder.java:1047)
        at org.apache.hadoop.streaming.PipeMapRed.configure(PipeMapRed.java:208)
        ... 23 more
    Caused by: java.io.IOException: error=2, No such file or directory
        at java.lang.UNIXProcess.forkAndExec(Native Method)
        at java.lang.UNIXProcess.<init>(UNIXProcess.java:186)
        at java.lang.ProcessImpl.start(ProcessImpl.java:130)
        at java.lang.ProcessBuilder.start(ProcessBuilder.java:1028)
        ... 24 more
    
    16/02/12 07:02:55 INFO mapreduce.Job: Task Id : attempt_1455284930183_0020_m_000001_2, Status : FAILED
    Error: java.lang.RuntimeException: Error in configuring object
        at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:109)
        at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:75)
        at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:133)
        at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:449)
        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:343)
        at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:163)
        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:1671)
        at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)
    Caused by: java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:106)
        ... 9 more
    Caused by: java.lang.RuntimeException: Error in configuring object
        at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:109)
        at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:75)
        at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:133)
        at org.apache.hadoop.mapred.MapRunner.configure(MapRunner.java:38)
        ... 14 more
    Caused by: java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:106)
        ... 17 more
    Caused by: java.lang.RuntimeException: configuration exception
        at org.apache.hadoop.streaming.PipeMapRed.configure(PipeMapRed.java:221)
        at org.apache.hadoop.streaming.PipeMapper.configure(PipeMapper.java:66)
        ... 22 more
    Caused by: java.io.IOException: Cannot run program "/tmp/map.rb": error=2, No such file or directory
        at java.lang.ProcessBuilder.start(ProcessBuilder.java:1047)
        at org.apache.hadoop.streaming.PipeMapRed.configure(PipeMapRed.java:208)
        ... 23 more
    Caused by: java.io.IOException: error=2, No such file or directory
        at java.lang.UNIXProcess.forkAndExec(Native Method)
        at java.lang.UNIXProcess.<init>(UNIXProcess.java:186)
        at java.lang.ProcessImpl.start(ProcessImpl.java:130)
        at java.lang.ProcessBuilder.start(ProcessBuilder.java:1028)
        ... 24 more
    
    16/02/12 07:02:56 INFO mapreduce.Job: Task Id : attempt_1455284930183_0020_m_000000_2, Status : FAILED
    Error: java.lang.RuntimeException: Error in configuring object
        at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:109)
        at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:75)
        at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:133)
        at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:449)
        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:343)
        at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:163)
        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:1671)
        at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)
    Caused by: java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:106)
        ... 9 more
    Caused by: java.lang.RuntimeException: Error in configuring object
        at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:109)
        at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:75)
        at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:133)
        at org.apache.hadoop.mapred.MapRunner.configure(MapRunner.java:38)
        ... 14 more
    Caused by: java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:106)
        ... 17 more
    Caused by: java.lang.RuntimeException: configuration exception
        at org.apache.hadoop.streaming.PipeMapRed.configure(PipeMapRed.java:221)
        at org.apache.hadoop.streaming.PipeMapper.configure(PipeMapper.java:66)
        ... 22 more
    Caused by: java.io.IOException: Cannot run program "/tmp/map.rb": error=2, No such file or directory
        at java.lang.ProcessBuilder.start(ProcessBuilder.java:1047)
        at org.apache.hadoop.streaming.PipeMapRed.configure(PipeMapRed.java:208)
        ... 23 more
    Caused by: java.io.IOException: error=2, No such file or directory
        at java.lang.UNIXProcess.forkAndExec(Native Method)
        at java.lang.UNIXProcess.<init>(UNIXProcess.java:186)
        at java.lang.ProcessImpl.start(ProcessImpl.java:130)
        at java.lang.ProcessBuilder.start(ProcessBuilder.java:1028)
        ... 24 more
    
    16/02/12 07:03:03 INFO mapreduce.Job:  map 100% reduce 100%
    16/02/12 07:03:04 INFO mapreduce.Job: Job job_1455284930183_0020 failed with state FAILED due to: Task failed task_1455284930183_0020_m_000001
    Job failed as tasks failed. failedMaps:1 failedReduces:0
    
    16/02/12 07:03:05 INFO mapreduce.Job: Counters: 13
        Job Counters 
            Failed map tasks=7
            Killed map tasks=1
            Launched map tasks=8
            Other local map tasks=6
            Data-local map tasks=2
            Total time spent by all maps in occupied slots (ms)=42705
            Total time spent by all reduces in occupied slots (ms)=0
            Total time spent by all map tasks (ms)=42705
            Total vcore-seconds taken by all map tasks=42705
            Total megabyte-seconds taken by all map tasks=43729920
        Map-Reduce Framework
            CPU time spent (ms)=0
            Physical memory (bytes) snapshot=0
            Virtual memory (bytes) snapshot=0
    16/02/12 07:03:05 ERROR streaming.StreamJob: Job not successful!
    Streaming Command Failed!
    
```
CC BY-SA 3.0
2016-02-12T15:29:48.823
22018
2016-02-12T16:41:08.467
2016-02-12T16:26:28.057
10492
14384
question
java linux centos hadoop
Hadoop で MapReduce 処理に失敗する原因を知りたい
map や reduce は各ノードで実行されるので、streaming を使う場合、mapper や reducer
は明示的に転送してやる必要があったはずです。`-mapper "/tmp/map.rb" -reducer "/tmp/reduce.rb"` の代わりに
`-file "/tmp/map.rb" -mapper "map.rb" -file "/tmp/reduce.rb" -reducer
"reduce.rb"` としたら、どうでしょうか。

あと気になったのが、`-output` で指定するのはディレクトリです。指定したディレクトリがHDFSに自動的に作成され(既にあるとエラー)、結果が
part-r-00000 のようなファイル名で保存されます。
CC BY-SA 3.0
2016-02-12T16:41:08.467
22020
2016-02-12T16:41:08.467
3605
22018
answer