hadoop操作hdfs错误

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我是靠谱客的博主魁梧芝麻，这篇文章主要介绍hadoop操作hdfs错误，现在分享给大家，希望可以做个参考。

本文转自：http://www.aboutyun.com/blog-61-22.html

当我们对hdfs操作的时候，我们可能会碰到如下错误

错误1：权限问题

Exception in thread "main" org.apache.hadoop.security.AccessControlException: org.apache.hadoop.security.AccessControlException: Permission denied: user=,

access=WRITE, inode="":root:supergroup:rwxr-xr-x
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
at org.apache.hadoop.ipc.RemoteException.instantiateException(RemoteException.java:95)
at org.apache.hadoop.ipc.RemoteException.unwrapRemoteException(RemoteException.java:57)
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