Caused by: org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.security.AccessControlException):

用windows连接hadoop集群执行mapreduce任务的时候出现以下错误：

org.apache.hadoop.security.AccessControlException:Permission denied: user=Administrator, access=WRITE,inode="/output":hadoop:supergroup:drwxr-xr-x

Causedby:org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.security.AccessControlException):Permission denied: user=Administrator, access=WRITE,inode="/output":hadoop:supergroup:drwxr-xr-x

Caused by: org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.security.AccessControlException):

出现原因：这个错误的原因是 eclipse 执行 mapreduce 任务时权限不够，需要增加权限。

解决方法：在 linux 上执行 hadoop fs -chmod -R 777 /

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