在hadoop中使用map减少读取文件

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我想在地图中编写java代码减少它在Eclipse中运行的形式，但是当我试图在地图中实现时减少表单我收到此错误请帮助我这个错误意味着什么如何解决此问题在hadoop中使用map减少读取文件

16/07/15 14:05:17 INFO Configuration.deprecation: session.id is deprecated. Instead, use dfs.metrics.session-id 
16/07/15 14:05:17 INFO jvm.JvmMetrics: Initializing JVM Metrics with processName=JobTracker, sessionId= 
16/07/15 14:05:17 INFO jvm.JvmMetrics: Cannot initialize JVM Metrics with processName=JobTracker, sessionId= - already initialized 
16/07/15 14:05:18 WARN mapreduce.JobSubmitter: Hadoop command-line option parsing not performed. Implement the Tool interface and execute your application with ToolRunner to remedy this. 
16/07/15 14:05:18 INFO mapred.FileInputFormat: Total input paths to process : 2 
16/07/15 14:05:18 INFO mapreduce.JobSubmitter: Cleaning up the staging area file:/app/hadoop/tmp/mapred/staging/hadoop1148163758/.staging/job_local1148163758_0001 
Exception in thread "main" java.io.IOException: Not a file: hdfs://localhost:54310/TcTest/NewTest 
    at org.apache.hadoop.mapred.FileInputFormat.getSplits(FileInputFormat.java:320) 
    at org.apache.hadoop.mapreduce.JobSubmitter.writeOldSplits(JobSubmitter.java:624) 
    at org.apache.hadoop.mapreduce.JobSubmitter.writeSplits(JobSubmitter.java:616) 
    at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:492) 
    at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1296) 
    at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1293) 
    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:1628) 
    at org.apache.hadoop.mapreduce.Job.submit(Job.java:1293) 
    at org.apache.hadoop.mapred.JobClient$1.run(JobClient.java:562) 
    at org.apache.hadoop.mapred.JobClient$1.run(JobClient.java:557) 
    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:1628) 
    at org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:557) 
    at org.apache.hadoop.mapred.JobClient.submitJob(JobClient.java:548) 
    at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:833) 
    at TextClassification.run(TextClassification.java:38) 
    at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70) 
    at TextClassification.main(TextClassification.java:43) 
    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.RunJar.run(RunJar.java:221) 
    at org.apache.hadoop.util.RunJar.main(RunJar.java:136)

来源

2016-07-15 Fazlur

_“我正在尝试编写java代码”_请发布此代码。 – Blobonat

你需要发布代码，然后只有人可以提供帮助。 – a874

您需要提供输入文件的完整路径作为程序的参数。右键单击程序 - >运行配置 - >参数

在此之前，您需要从您的hadoop-version/share/hadoop文件夹中添加几个jar文件。您可以参考以下博客，了解如何在本地模式下通过eclipse运行地图缩减程序的完整细节。

https://acadgild.com/blog/running-mapreduce-in-local-mode-2/

来源

2016-07-15 09:57:33

我想在hadoop中运行程序并获取这些错误我该如何解决它，最重要的是，为什么这些错误显示，如果你可以解释它将是非常有益的。 – Fazlur

这完全取决于您编写的代码，通过查看错误是很困难的。 –

在hadoop中使用map减少读取文件

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