Hadoop eclipse mapreduce不工作？ [英] Hadoop eclipse mapreduce is not working?

问题描述

我刚刚将 hadoop-eclipse-plugin-1.0.3.jar 复制到eclipse / plugins目录中，以使事情发生。但不幸的是，这并不适合我。当我尝试连接eclipse到我的Hadoop版本1.1.1 集群时，它抛出了这个错误：

 在地图/减少位置状态更新程序期间发生内部错误。 org / codehaus / jackson / map / JsonMappingException 
  

有什么选项可以解决这个问题吗？

解决方案

只需按照以下步骤：

<转到您的 HADOOP_HOME / contrib 文件夹。将 hadoop-eclipse-plugin - *。jar 复制到某处并解压。这将给出一个名为的文件夹hadoop-eclipse-plugin - *

2-现在，添加以下5个jar你的HADOOP_HOME / lib文件夹到hadoop-eclipse-plugin - * / lib文件夹，你刚才提取了插件之后就已经有了：

  commons-configuration-1.6.jar 
 commons-httpclient-3.0.1.jar 
 commons-lang-2.4.jar 
 jackson-core-asl-1.0.1.jar 
 jackson-mapper-asl-1.0.1.jar 
  

3-现在，修改 hadoop-eclipse-plugin - * / META-INF / MANIFEST.MF 文件，并将Bundle-ClassPath更改为：
Bundle-ClassPath：classes /，

  lib / hadoop-core.jar，
 lib / commons-cli-1.2.jar，
 lib / commons- httpclient-3.0.1.jar，
 lib / jackson-core-asl-1.0.1.jar，
 lib / jackson-mapper-asl-1.0.1.jar，
 lib / commons-configuration-1.6.jar，
 lib / commons-lang-2.4.jar 
  

4-现在，重新'包'并将这个新的jar放在eclipse / plugin里面ctory并重启日食。

，并检查此链接。

I just have copied hadoop-eclipse-plugin-1.0.3.jar to the eclipse/plugins directory in order to get things going. But unfortunately it did not work for me. When I tried to connect eclipse to my Hadoop Version 1.1.1 cluster it threw this error :

An internal error occurred during: "Map/Reduce location status updater". org/codehaus/jackson/map/JsonMappingException

Is there any option to fix this?

解决方案

Just follow these steps :

1- Go to your HADOOP_HOME/contrib folder. Copy the hadoop-eclipse-plugin-*.jar somewhere and extract it. This will give a folder named hadoop-eclipse-plugin-*

2- Now, add following 5 jars from your HADOOP_HOME/lib folder to the hadoop-eclipse-plugin-*/lib folder, you have got just now after extracting the plugin :

commons-configuration-1.6.jar
commons-httpclient-3.0.1.jar
commons-lang-2.4.jar
jackson-core-asl-1.0.1.jar
jackson-mapper-asl-1.0.1.jar

3- Now, modify the hadoop-eclipse-plugin-*/META-INF/MANIFEST.MF file and change the Bundle-ClassPath to : Bundle-ClassPath: classes /,

lib / hadoop-core.jar, 
lib/commons-cli-1.2.jar,
lib/commons-httpclient-3.0.1.jar, 
lib/jackson-core-asl-1.0.1.jar , 
lib/jackson-mapper-asl-1.0.1.jar, 
lib/commons-configuration-1.6.jar, 
lib/commons-lang-2.4.jar

4- Now, re 'jar' the package and place this new jar inside eclipse/plugin directory and restart the eclipse.

and also check this link.

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