17.5. FAQ

编辑 /srv/apache-hadoop/etc/hadoop/core-site.xml 文件，增加如下配置，这里使用 * 匹配，你可以根据实际需要修改。

			
 	<property>
        <name>hadoop.proxyuser.hadoop.groups</name>
        <value>*</value>
        <description>Allow the superuser oozie to impersonate any members of the group group1 and group2</description>
    </property>
    <property>
        <name>hadoop.proxyuser.hadoop.hosts</name>
        <value>*</value>
        <description>The superuser can connect only from host1 and host2 to impersonate a user</description>
    </property>
			
			

下面是我的配置文件仅供参考

			
<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<configuration>
	<property>
		<name>fs.defaultFS</name>
		<value>hdfs://localhost:9000/</value>
	</property>
    <property>
        <name>hadoop.proxyuser.hadoop.groups</name>
        <value>hadoop</value>
        <description>Allow the superuser oozie to impersonate any members of the group group1 and group2</description>
    </property>
    <property>
        <name>hadoop.proxyuser.hadoop.hosts</name>
        <value>192.168.0.1,127.0.0.1,localhost</value>
        <description>The superuser can connect only from host1 and host2 to impersonate a user</description>
    </property>
</configuration>
			
			

重启 Hadoop

			
[hadoop@localhost hadoop]$ /srv/apache-hadoop/sbin/stop-all.sh 
This script is Deprecated. Instead use stop-dfs.sh and stop-yarn.sh
Stopping namenodes on [localhost]
localhost: stopping namenode
localhost: stopping datanode
Stopping secondary namenodes [0.0.0.0]
0.0.0.0: stopping secondarynamenode
stopping yarn daemons
stopping resourcemanager
localhost: stopping nodemanager
localhost: nodemanager did not stop gracefully after 5 seconds: killing with kill -9
no proxyserver to stop

[hadoop@localhost hadoop]$ /srv/apache-hadoop/sbin/start-all.sh 
This script is Deprecated. Instead use start-dfs.sh and start-yarn.sh
Starting namenodes on [localhost]
localhost: starting namenode, logging to /srv/apache-hadoop-2.8.0/logs/hadoop-hadoop-namenode-localhost.localdomain.out
localhost: starting datanode, logging to /srv/apache-hadoop-2.8.0/logs/hadoop-hadoop-datanode-localhost.localdomain.out
Starting secondary namenodes [0.0.0.0]
0.0.0.0: starting secondarynamenode, logging to /srv/apache-hadoop-2.8.0/logs/hadoop-hadoop-secondarynamenode-localhost.localdomain.out
starting yarn daemons
starting resourcemanager, logging to /srv/apache-hadoop-2.8.0/logs/yarn-hadoop-resourcemanager-localhost.localdomain.out
localhost: starting nodemanager, logging to /srv/apache-hadoop-2.8.0/logs/yarn-hadoop-nodemanager-localhost.localdomain.out
			
			

刷新配置

原文出处：Netkiller 系列 手札
本文作者：陈景峯
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