hadoop2.0安装中遇到的错误:mapreduce.shuffle set in yarn.nodemanager.aux-services is invalid

转：http://blog.csdn.net/bamuta/article/details/12995139

解决办法 ：

在1个网站上找到了解决方法，（网络忘了没记）
urg, my copy/paste was botched up but hopefully this still makes sense. The value mapreduce.shuffle is now mapreduce_shuffle and the name yarn.nodemanager.aux-services.mapreduce.shuffle.class is now yarn.nodemanager.aux-services.mapreduce_shuffle.class

是yarn.site.xml参数配置的问题

yarn.nodemanager.aux-services.mapreduce_shuffle.class部分的错误

正确的是这样：
<property>
<name>yarn.nodemanager.aux-services.mapreduce_shuffle.class</name>
<value>mapreduce_shuffle</value>
 <description>shuffle service that needs to be set for Map Reduce to run </description>
  </property>