windows下使用Eclipse编译运行MapReduce程序 Hadoop2.6.0/Ubuntu（二）

标签：eclipse编写hadoop程序   hadoop   

在上篇文章中eclipse已经能访问HDFS目录，但并不能进行Mapreduce编程，在这里小编将常见错误和处理办法进行总结，希望对大家有所帮助

错误1：ERROR [main] util.Shell (Shell.java:getWinUtilsPath(303)) - Failed to locate the winutils binary in the hadoop binary path  
java.io.IOException: Could not locate executable null\bin\winutils.exe in the Hadoop binaries.
解决办法：

eg:我解压的目录是D:\hadoop-2.6.0

在系统的环境变量界面添加HADOOP_HOME，并在系统变量PATH中添加如图：

然后eclipse中选择Windows->Prefenences设置如图：

错误2：Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

错误3：Exception in thread "main" java.lang.UnsatisfiedLinkError: org.apache.hadoop.io.nativeio.NativeIO$Windows.access0(Ljava/lang/String;I)Z

上面两个问题是缺少组件，解决办法：

下载hadoop-common-2.2.0-bin-master

将里边bin 目录替换 本地hadoop里边的bin目录

错误:4：

15/08/03 10:15:43 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
15/08/03 10:15:43 INFO client.RMProxy: Connecting to ResourceManager at /0.0.0.0:8032
15/08/03 10:15:55 INFO ipc.Client: Retrying connect to server: 0.0.0.0/0.0.0.0:8032. Already tried 0 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
15/08/03 10:15:57 INFO ipc.Client: Retrying connect to server: 0.0.0.0/0.0.0.0:8032. Already tried 1 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
15/08/03 10:15:59 INFO ipc.Client: Retrying connect to server: 0.0.0.0/0.0.0.0:8032. Already tried 2 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)

解决办法：

将集群配置文件中core-site.xml  localhost改为你主节点IP

然后加入在yarn-site.xml中加入

<property>
<name>yarn.resourcemanager.address</name>
<value>127.0.0.1:8032</value>
</property>
<property>
<name>yarn.resourcemanager.scheduler.address</name>
<value>127.0.0.1:8030</value>
</property>
<property>
<name>yarn.resourcemanager.resource-tracker.address</name>
<value>127.0.0.1:8031</value>
</property>
<property>
<name>yarn.resourcemanager.hostname</name>
<value>127.0.0.1</value>
</property>

特别注意的是，修改后，集群要重新启动，且把里边的修改的文件重新copy一份到程序的src目录下，在eclipse中刷新

错误5：

Exit code: 1
Exception message: /bin/bash: 第 0 行: fg: 无任务控制

Stack trace: ExitCodeException exitCode=1: /bin/bash: 第 0 行: fg: 无任务控制

解决办法参考网上给的教程：http://www.aboutyun.com/thread-8498-1-1.html 并未解决

真正的办法是：

在客户端配置文件中添加如下属性：

    <property>
        <name>mapreduce.app-submission.cross-platform</name>
        <value>true</value>
    </property>

推荐一篇不错的博客：http://www.aboutyun.com/thread-8311-1-1.html

windows下使用Eclipse编译运行MapReduce程序 Hadoop2.6.0/Ubuntu（二）

标签：eclipse编写hadoop程序   hadoop   

原文地址：http://blog.csdn.net/gamer_gyt/article/details/47252671