you can run you MR programm in the relative *nix account, make sure it is as same as your hdfs dir user and group . or you can trun off the hdfs permission conf .
2009/11/20, Ananth T. Sarathy <ananth.t.sara...@gmail.com>: > I just set up a hadoop cluster. When I try to write to it from my java code, > I get the.error below. When using the core-site.xml, do I need to specify a > user? > > > > org.apache.hadoop.security.AccessControlException: > org.apache.hadoop.security.AccessControlException: Permission denied: > user=DrWho, access=WRITE, inode="":root:supergroup:rwxr-xr-x > at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) > at > sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) > at > sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) > at java.lang.reflect.Constructor.newInstance(Constructor.java:513) > at > org.apache.hadoop.ipc.RemoteException.instantiateException(RemoteException.java:96) > at > org.apache.hadoop.ipc.RemoteException.unwrapRemoteException(RemoteException.java:58) > at > org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.<init>(DFSClient.java:2647) > at org.apache.hadoop.hdfs.DFSClient.create(DFSClient.java:463) > at > org.apache.hadoop.hdfs.DistributedFileSystem.create(DistributedFileSystem.java:195) > at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:479) > at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:460) > at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:367) > at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:359) > at > com.iswcorp.hadoop.HadoopDataManagerImpl.writeToFile(HadoopDataManagerImpl.java:151) > at > com.iswcorp.hadoop.HadoopDataManagerImpl.main(HadoopDataManagerImpl.java:46) > Caused by: org.apache.hadoop.ipc.RemoteException: > org.apache.hadoop.security.AccessControlException: Permission denied: > user=DrWho, access=WRITE, inode="":root:supergroup:rwxr-xr-x > at > org.apache.hadoop.hdfs.server.namenode.PermissionChecker.check(PermissionChecker.java:176) > at > org.apache.hadoop.hdfs.server.namenode.PermissionChecker.check(PermissionChecker.java:157) > at > org.apache.hadoop.hdfs.server.namenode.PermissionChecker.checkPermission(PermissionChecker.java:105) > at > org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkPermission(FSNamesystem.java:4545) > at > org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkAncestorAccess(FSNamesystem.java:4515) > at > org.apache.hadoop.hdfs.server.namenode.FSNamesystem.startFileInternal(FSNamesystem.java:1023) > at > org.apache.hadoop.hdfs.server.namenode.FSNamesystem.startFile(FSNamesystem.java:977) > at > org.apache.hadoop.hdfs.server.namenode.NameNode.create(NameNode.java:389) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) > at java.lang.reflect.Method.invoke(Method.java:597) > at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:508) > at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:959) > at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:955) > at java.security.AccessController.doPrivileged(Native Method) > at javax.security.auth.Subject.doAs(Subject.java:396) > at org.apache.hadoop.ipc.Server$Handler.run(Server.java:953) > > at org.apache.hadoop.ipc.Client.call(Client.java:739) > at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:220) > at $Proxy0.create(Unknown Source) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) > at java.lang.reflect.Method.invoke(Method.java:597) > at > org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:82) > at > org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:59) > at $Proxy0.create(Unknown Source) > at > org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.<init>(DFSClient.java:2644) > ... 8 more > Ananth T Sarathy > -- 从我的移动设备发送 －－－－－ 天天开心 身体健康
