hadoop常见错误

1：org.apache.hadoop.security.AccessControlException: org.apache.hadoop.security.AccessControlException:
 Can't continue with getBlockLocalPathInfo() authorization. The user admin is not allowed to call getBlockLocalPathInfo

vi conf/hdfs-site.xml 
 <configuration> 

        //ClientDatanodeProtocol 调用getBlockLocalPathInfo的时候会抛出

        //org.apache.hadoop.security.AccessControlException: org.apache.hadoop.security.AccessControlException:

      <property>
          <name>dfs.block.local-path-access.user</name>
          <value>lv</value>
     </property>

2：org.apache.hadoop.ipc.RemoteException: java.io.IOException: java.lang.NullPointerException  

如果要传递path为字符串，不应该包含hdfs://namenode前缀