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From Rakesh Radhakrishnan <rake...@apache.org>
Subject Re: Error in Hbase backup from secure to normal cluster.
Date Mon, 11 Jul 2016 13:02:09 GMT
Hi Matheskrishna,

Adding one more thought to my above comments.

Since you are telling about the job execution failure on distcp, I think it
would be good to analyse the failure logs of the job to see any problem is
that inside the staging directory in hdfs or we may get some hint about the


On Mon, Jul 11, 2016 at 6:13 PM, Rakesh Radhakrishnan <rakeshr@apache.org>

> Hi,
> Hope you are executing 'distcp' command from the secured cluster. Are you
> executing the command from a non-super user? Please explain me the
> command/way you are executing to understand, how you are entering "entered
> super user credentials" and -D command line args.
> Also, please share your hdfs-site.xml, core-site.xml configurations.
> Have you modified any of these configurations or passed as -D command line
> args.
> In core-site.xml on the secure cluster side:
> <property>
>   <name>ipc.client.fallback-to-simple-auth-allowed</name>
> </property>
> In hdfs-site.xml on the secure cluster side:
> <property>
>   <name>dfs.permissions.superusergroup</name>
>   <description>This is by default set to an arbitrary string "superuser",
> which is
>     mostly a non existing group on most (all?) environments. Changing this
>     and/or creating such a group name on the NN machine will let you
>     permit more users to act as superusers, if needed.
>  </description>
> </property>
> Again, I'd suggest you to post this problem to the hbase user mailing list
> to know any specific configurations from HBase side.
> Regards,
> Rakesh
> On Mon, Jul 11, 2016 at 3:45 PM, mathes waran <matheskrishna@gmail.com>
> wrote:
>> Hi,
>> I tried distcp method in hbase backup from secure to normal cluster,In my
>> backup job the data is transferred successfully from secure to normal
>> cluster,but in resource manager job id is shown as failed due to error of
>> Non super user cannot change owner.
>> However, table and snapshot is created successfully and restoring table
>> from normal to secure is executed successfully.
>> But in HBase backup due to this error ,application Id is shown as failed.
>> Please find the error details as below:
>> *Caused by:
>> org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.security.AccessControlException):
>> Non-super user cannot change owner*
>> Even I entered super user credentials while executing distcp job from
>> secure to normal cluster,this exception is occurred.
>> please note that,this error is occurred only on backup from secure to
>> normal,and its not occur on restoring table.
>> Can u pls tell me is there any changes in configuration file or how could
>> i solve this..?
>> Looking back.!
>> Thanks,
>> Matheskrishna

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