Hadoop 单机部署与eclipse开发

A)版本 

hadoop-1.0.3 

jdk1.6.0_32

eclipse hadoop开发插件 hadoop-eclipse-plugin-1.0.3.jar

hadoop-1.0.3  使用单机模式安装, 端口 hdfs 9000  mapred 9001

B)环境

1) hadoop-1.0.3 的安装步骤 可以参照http://hadoop.apache.org/docs/r1.0.3/single_node_setup.html

conf/core-site.xml

<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>

<!-- Put site-specific property overrides in this file. -->
<configuration>
<property>  
        <name>fs.default.name</name>  
        <value>hdfs://xxx.xxx.xxx.xxx:9000</value>  
</property>
<property>
        <name>hadoop.tmp.dir</name>
        <value>/opt/hadoop-1.0.3/tmp</value> 
</property>
</configuration>


conf/mapred-site.xml:

<configuration>
     <property>
         <name>mapred.job.tracker</name>
         <value>xxx.xxx.xxx.xxx:9001</value>
     </property>
</configuration>

conf/hdfs-site.xml

<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>

<!-- Put site-specific property overrides in this file. -->

<configuration>
        <property>  
                <name>dfs.replication</name>  
                <value>1</value>  
        </property>  
        <property> 
                <name>dfs.permissions</name> 
                <value>false</value> 
        </property>
</configuration>


将xxx.xxx.xxx.xxx改成你的服务器的IP


2)开发

1、用的是WINDOWS 下的 Eclipse,将插件复制到plugin目录里就可以了

2、将hadoop-1.0.3  解压到程序员的开发机器上

3、设置Hadoop Map/Reduce到你解压的目录

4、配置Map/Reduce Location 

5、

新建Map/Reduce工程 

examples\org\apache\hadoop\examples中的WordCount.java导入到工程里


问题出来了 直接运行的话 会提示权限问题。

12/09/24 13:52:27 ERROR security.UserGroupInformation: PriviledgedActionException as:zzj cause:java.io.IOException: Failed to set permissions of path: \tmp\hadoop-zzj\mapred\staging\zzj-743566479\.staging to 0700
Exception in thread "main" java.io.IOException: Failed to set permissions of path: \tmp\hadoop-zzj\mapred\staging\zzj-743566479\.staging to 0700

处理这个问题可以直接使用。

conf.set("mapred.job.tracker", "218.249.75.144:9001");
来手工指定


用RunAS 选择 Run on Hadoop运行这个工程。eclipse 会自动将Jar包传输到Hadoop上并运行






原文地址:https://www.cnblogs.com/cl1024cl/p/6204794.html