Hadoop2.0 配置yarn成功，记住这个成功的一刻，把几个主要文件贴出来：
--------------------------------------分割线 -------------------------------------- core-site.xml: <?xml version="1.0"?> <?xml-stylesheet type="text/xsl" href="https://www.linuxidc.com/Linux/2014-05/configuration.xsl"?>
<!-- Put site-specific property overrides in this file. -->
<configuration> <property> <name>fs.defaultFS</name> <value>hdfs://fc20:9000</value> </property>
<property> <name>hadoop.tmp.dir</name> <value>/home/ljq/hadoop/tmp</value> </property>
<property> <name>hadoop.native.lib</name> <value>false</value> <description>Should native hadoop libraries, if present, be used.</description> </property> </configuration>
hdfs-site.xml: <?xml version="1.0"?> <?xml-stylesheet type="text/xsl" href="https://www.linuxidc.com/Linux/2014-05/configuration.xsl"?>
<!-- Put site-specific property overrides in this file. -->
<configuration> <property> <name>dfs.replication</name> <value>1</value> </property>
<property> <name>dfs.namenode.name.dir</name> <value>/home/ljq/hadoop/dfs/name</value> </property>
<property> <name>dfs.datanode.data.dir</name> <value>/home/ljq/hadoop/dfs/data</value> </property> </configuration>
mapred-site.xml: <?xml version="1.0"?> <?xml-stylesheet type="text/xsl" href="https://www.linuxidc.com/Linux/2014-05/configuration.xsl"?>
<!-- Put site-specific property overrides in this file. -->
<configuration> <property> <name>mapreduce.framework.name</name> <value>yarn</value> 一定是小写yarn否则出现错误:java.lang.IllegalStateException: Invalid shuffle port number -1 </property> </configuration>
yarn-site.xml: 文件里所有yarn都必须小写,否则相应的端口信息找不到,会在默认端口上启动进程 <?xml version="1.0"?> <configuration>
<!-- Site specific YARN configuration properties -->
<property> <description>The hostname of the RM.</description> <name>yarn.resourcemanager.hostname</name> <value>fc20</value> </property> <property> <name>yarn.nodemanager.aux-services</name> <value>mapreduce.shuffle</value> </property> <property> <description>The address of the applications manager interface in the RM.</description> <name>yarn.resourcemanager.address</name> <value>fc20:18004</value> </property> <property> <description>The address of the scheduler interface.</description> <name>yarn.resourcemanager.scheduler.address</name> <value>fc20:18003</value> </property> <property> <description>The address of the RM web application.</description> <name>yarn.resourcemanager.webapp.address</name> <value>fc20:18008</value> </property> <property> <description>The address of the resource tracker interface.</description> <name>yarn.resourcemanager.resource-tracker.address</name> <value>fc20:18006</value> </property>
</configuration>
通过netstat可以看见相应端口已经启动 运行wordcount以及自己写的mapreduce可以成功完成!
