Re: unsubscribe

[Attila Bukor]

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> On 2018. Dec 7., at 18:39, Angelo Matarazzo  wrote:
> 
> 
> 
> Il giorno gio 6 dic 2018 alle 08:04 Bandi, Saidi R  ha 
> scritto:
>  
> 
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Re: Datanode can't connect namenode with kerberos

[Attila Bukor]

All HDFS processes (NameNodes, DataNodes, JournalNodes, FailoverControllers) to
run as the same user, e.g. “hdfs”.


> On 2018. Nov 9., at 8:35, Harinder Singh  
> wrote:
> 
> I think you need a superuser to start the service. Is datanode a superuser?
> 
> Regards
> Harinder
> 
> On Thu, Nov 8, 2018 at 11:29 PM ZongtianHou  
> wrote:
> Hi, everyone
> I set up kerberos for the hdfs cluster, but after I start name node, then the 
> datanode, In the namenode log file, it display the following error:
> 
> 2018-11-09 15:09:38,725 WARN org.apache.hadoop.security.UserGroupInformation: 
> No groups available for user datanode
> 4870 2018-11-09 15:09:38,725 INFO org.apache.hadoop.ipc.Server: IPC Server 
> handler 0 on 8020, call 
> org.apache.hadoop.hdfs.server.protocol.DatanodeProtocol.versionRequest from 
> 127.0.0.1:56409  Call#132 Retry#0: 
> org.apache.hadoop.security.AccessControlException: Access denied for user 
> datanode. Superuser privilege is required
> 
> The kerberos auth for name node and data node are both ok,  can anyone see 
> the problem here, any hint will be very appreciated.
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