beeline> !connect jdbc:hive2://master:10000

Connecting to jdbc:hive2://master:10000

Enter username for jdbc:hive2://master:10000: root

Enter password for jdbc:hive2://master:10000:                                                    

Enter password for jdbc:hive2://master:10000: Error: Failed to open new session: java.lang.RuntimeException: org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.security.authorize.AuthorizationException): User: root is not allowed to impersonate root (state=,code=0)

解决办法：

<!-- 在core-site.xml添加如下属性：-->

<property>

      <name>hadoop.proxyuser.root.groups</name>

      <value>root</value>

      <description>Allow the superuser oozie to impersonate any members of the group group1 and group2</description>

    </property>

<property>

      <name>hadoop.proxyuser.root.hosts</name>

      <value>localhost</value>

      <description>The superuser can connect only from host1 and host2 to impersonate a user</description>

</property>