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From Eric Yang <ey...@hortonworks.com>
Subject Re: HBase user as different user from HDFS user for HBase 0.92 and Hadoop 0.20.205.0
Date Wed, 09 Nov 2011 16:49:48 GMT
Hi Harsh,

Thanks for the heads up.  My git repository was out of date.  HBASSE-4708 solved the problem.
 Thanks again.

regards,
Eric

On Nov 8, 2011, at 6:49 PM, Harsh J wrote:

> This was https://issues.apache.org/jira/browse/HBASE-4510 but was reverted. Are you sure
you are using the latest 0.92 HEAD?
> 
> Revert ticket was https://issues.apache.org/jira/browse/HBASE-4708
> 
> On 09-Nov-2011, at 4:10 AM, Eric Yang wrote:
> 
>> Hi all,
>> 
>> HBase 0.92 branch is setting permission of / to 755 before HBase Master can start.
 This triggers a permission denied error, when HBase user is different from HDFS user.  The
stack trace of this exception:
>> 
>> hbase master log file:
>> 
>> 2011-11-08 14:15:25,716 FATAL org.apache.hadoop.hbase.master.HMaster: Unhandled exception.
Starting shutdown.
>> org.apache.hadoop.security.AccessControlException: org.apache.hadoop.security.AccessControlException:
Permission denied
>>       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:95)
>>       at org.apache.hadoop.ipc.RemoteException.unwrapRemoteException(RemoteException.java:57)
>>       at org.apache.hadoop.hdfs.DFSClient.setPermission(DFSClient.java:922)
>>       at org.apache.hadoop.hdfs.DistributedFileSystem.setPermission(DistributedFileSystem.java:515)
>>       at org.apache.hadoop.hbase.util.FSUtils.isInSafeMode(FSUtils.java:168)
>>       at org.apache.hadoop.hbase.util.FSUtils.waitOnSafeMode(FSUtils.java:456)
>>       at org.apache.hadoop.hbase.master.MasterFileSystem.checkRootDir(MasterFileSystem.java:301)
>>       at org.apache.hadoop.hbase.master.MasterFileSystem.createInitialFileSystemLayout(MasterFileSystem.java:127)
>>       at org.apache.hadoop.hbase.master.MasterFileSystem.<init>(MasterFileSystem.java:112)
>>       at org.apache.hadoop.hbase.master.HMaster.finishInitialization(HMaster.java:426)
>>       at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:309)
>>       at java.lang.Thread.run(Thread.java:662)
>> Caused by: org.apache.hadoop.ipc.RemoteException: org.apache.hadoop.security.AccessControlException:
Permission denied
>>       at org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.checkOwner(FSPermissionChecker.java:149)
>>       at org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.checkPermission(FSPermissionChecker.java:140)
>>       at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkPermission(FSNamesystem.java:5164)
>>       at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkOwner(FSNamesystem.java:5123)
>>       at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.setPermission(FSNamesystem.java:845)
>>       at org.apache.hadoop.hdfs.server.namenode.NameNode.setPermission(NameNode.java:653)
>>       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$Server.call(RPC.java:563)
>>       at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1388)
>>       at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1384)
>>       at java.security.AccessController.doPrivileged(Native Method)
>>       at javax.security.auth.Subject.doAs(Subject.java:396)
>>       at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1059)
>>       at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1382)
>> 
>>       at org.apache.hadoop.ipc.Client.call(Client.java:1066)
>>       at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:225)
>>       at $Proxy10.setPermission(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 $Proxy10.setPermission(Unknown Source)
>>       at org.apache.hadoop.hdfs.DFSClient.setPermission(DFSClient.java:920)
>>       ... 9 more
>> 
>> namenode log:
>> 
>> 2011-11-08 14:15:25,713 INFO org.apache.hadoop.ipc.Server: IPC Server handler 4 on
8020, call setPermission(/, rwxr-xr-x) from 127.0.0.1:55838: error: org.apache.hadoop.security.AccessControlException:
Permission denied
>> org.apache.hadoop.security.AccessControlException: Permission denied
>>       at org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.checkOwner(FSPermissionChecker.java:149)
>>       at org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.checkPermission(FSPermissionChecker.java:140)
>>       at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkPermission(FSNamesystem.java:5164)
>>       at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkOwner(FSNamesystem.java:5123)
>>       at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.setPermission(FSNamesystem.java:845)
>>       at org.apache.hadoop.hdfs.server.namenode.NameNode.setPermission(NameNode.java:653)
>>       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>       at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>       at java.lang.reflect.Method.invoke(Method.java:597)
>>       at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:563)
>>       at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1388)
>>       at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1384)
>>       at java.security.AccessController.doPrivileged(Native Method)
>>       at javax.security.auth.Subject.doAs(Subject.java:396)
>>       at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1059)
>>       at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1382)
>> 
>> What is the reason of setting permission of "/" to 755?  In theory, HDFS has been
setup with a /apps/hbase directory, and set proper permission for hbase to interact only in
/apps/hbase directory.  Does this assumption work?
>> 
>> regards,
>> Eric
> 


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