Perl 为什么我的减速机坏了？（Hadoop）

所以我写了两个Perl脚本来练习MapReduce。这个程序应该计算我放在一个目录中的一堆文本文件中的所有单词

这是我的mapper.pl

#!/usr/bin/perl

use 5.010;
use strict;
use warnings;

while(my $line = <>) {
    my @words = split(' ', $line);

    foreach my $word(@words) {
        print "$word \t 1\n";
    }
}

我得到以下错误：

13/07/19 11:36:33 INFO streaming.StreamJob:  map 0%  reduce 0%
13/07/19 11:36:39 INFO streaming.StreamJob:  map 9%  reduce 0%
13/07/19 11:36:40 INFO streaming.StreamJob:  map 64%  reduce 0%
13/07/19 11:36:41 INFO streaming.StreamJob:  map 73%  reduce 0%
13/07/19 11:36:44 INFO streaming.StreamJob:  map 82%  reduce 0%
13/07/19 11:36:45 INFO streaming.StreamJob:  map 100%  reduce 0%
13/07/19 11:36:49 INFO streaming.StreamJob:  map 100%  reduce 11%
13/07/19 11:36:53 INFO streaming.StreamJob:  map 100%  reduce 0%
13/07/19 11:37:02 INFO streaming.StreamJob:  map 100%  reduce 17%
13/07/19 11:37:03 INFO streaming.StreamJob:  map 100%  reduce 33%
13/07/19 11:37:06 INFO streaming.StreamJob:  map 100%  reduce 17%
13/07/19 11:37:08 INFO streaming.StreamJob:  map 100%  reduce 0%
13/07/19 11:37:16 INFO streaming.StreamJob:  map 100%  reduce 33%
13/07/19 11:37:21 INFO streaming.StreamJob:  map 100%  reduce 0%
13/07/19 11:37:31 INFO streaming.StreamJob:  map 100%  reduce 33%
13/07/19 11:37:35 INFO streaming.StreamJob:  map 100%  reduce 17%
13/07/19 11:37:38 INFO streaming.StreamJob:  map 100%  reduce 100%
13/07/19 11:37:38 INFO streaming.StreamJob: To kill this job, run:
13/07/19 11:37:38 INFO streaming.StreamJob: /usr/local/hadoop/libexec/../bin/hadoop job  -Dmapred.job.tracker=shiv0:54311 -kill job_201307031312_0065
13/07/19 11:37:38 INFO streaming.StreamJob: Tracking URL: http://shiv0:50030/jobdetails.jsp?jobid=job_201307031312_0065
13/07/19 11:37:38 ERROR streaming.StreamJob: Job not successful. Error: # of failed Reduce Tasks exceeded allowed limit. FailedCount: 1. LastFailedTask: task_201307031312_0065_r_000001
13/07/19 11:37:38 INFO streaming.StreamJob: killJob... Streaming Command Failed!

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一段时间以来，我一直在试图找出我做错了什么，我一直在挠头。有人对我如何诊断这个问题有什么建议吗？

bin/hadoop-jar contrib/streaming/hadoop-streaming-1.1.2.jar-file/home/hduser/countWords/mapper.py-mapper/home/hduser/countWords/mapper.py-file/home/hduser/countWords/reducer.py-reducer/home/hduser/countWords/reducer.py-input/user/hduser/testData/*-output/用户/hduser/testData/output/*

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为什么要调用.py文件？你不应该调用perl文件，即reducer.pl而不是reducer.py吗？我犯了一个极其愚蠢的错误。。reducer.pl的shbang行不正确。我有

#!/bin/usr/perl

而不是

#!/usr/bin/perl

---

您的命令行显示了

mapper.py

和

reducer.py

。是的，对不起，我刚刚修复了它。我试图运行一个python版本的程序，我在网上找到了这个程序是的，这是我的错。我试图运行一个在python online中找到的单词计数应用程序，看看它是否也能运行。我在上面修好了

#!/bin/usr/perl

#!/usr/bin/perl