Failed to open new session: java.lang.RuntimeException:
 org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.security.authorize.AuthorizationException): 
User: hadoop is not allowed to impersonate cheng

user:hadoop is 我的hadoop安装使用，程是ubuntu用户。
我的系统中已经有以下配置 core-site.xml :

<name>hadoop.proxyuser.hive.hosts</name>
    <value>*</value>
</property>
<property>
    <name>hadoop.proxyuser.hive.groups</name>
   <value>*</value>
</property>