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From Vinayakumar B <vinayakumarb.apa...@gmail.com>
Subject RE: Authenticating to Kerberos enabled Hadoop cluster using Java
Date Mon, 02 Nov 2015 14:42:13 GMT
For simplicity You just can copy HADOOP_CONF_DIR from one of the cluster's
machine. And place it in class path of the client program.

Principal you are using to login is the client principal. It can be
different from server principal.

-Vinay
On Nov 2, 2015 22:37, "Vishwakarma, Chhaya" <
Chhaya.Vishwakarma@thinkbiganalytics.com> wrote:

> Thanks Subroto
>
>
>
> dfs.namenode.kerberos.principal=hdfs/hadoop@HADOOP.COM this is principal
> specified here “UserGroupInformation.loginUserFromKeytab(String, String) “
> or it is something different ?
>
>
>
> *From:* Subroto Sanyal [mailto:ssanyal@datameer.com]
> *Sent:* 02 November 2015 19:54
> *To:* user@hadoop.apache.org
> *Subject:* Re: Authenticating to Kerberos enabled Hadoop cluster using
> Java
>
>
>
> Hi Chhaya,
>
>
>
> Few configuration you need to set:
>
> hadoop.security.authentication=kerberos
>
> hadoop.security.authorization=true
>
> dfs.namenode.kerberos.principal=hdfs/hadoop@HADOOP.COM
>
> fs.defaultFS=hdfs://host:port
>
> Further you need to
> use org.apache.hadoop.security.UserGroupInformation.loginUserFromKeytab(String,
> String) as suggested in one of the trailing mail.
>
>
>
> Cheers,
>
> Subroto Sanyal
>
>
>
> On Mon, Nov 2, 2015 at 3:13 PM, Vishwakarma, Chhaya <
> Chhaya.Vishwakarma@thinkbiganalytics.com> wrote:
>
> Code is successfully authenticating to Kerberos but when I try to run any
> hdfs command I get error as "Failed to specify server's kerberos principal
> name"
>
> Can somebody please assist me on this?
>
> Sent from my android device.
>
>
>
> -----Original Message-----
> From: andreina j <andreina.j@huawei.com>
> To: "user@hadoop.apache.org" <user@hadoop.apache.org>
> Sent: Mon, 02 Nov 2015 4:57 pm
> Subject: RE: Authenticating to Kerberos enabled Hadoop cluster using Java
>
> Hi Chhaya,
>
>
>
> Please find below sample code .
>
>
>
>   System.setProperty("java.security.krb5.conf",
> "D:\\data\\Desktop\\cluster-test\\krb5.conf");
>
> // Login using keytab if have access to keytab. else
>     UserGroupInformation.loginUserFromKeytab("hdfs/hadoop@HADOOP.COM",
>        "  D:\\data\\Desktop\\cluster-test\\conf\\hdfs.keytab");
>
>
>
> Note: Above 2 lines should be at the beginning  in your application.
>
>
>
> Regards
>
> Andreina J
>
>
>
> *From:* Vishwakarma, Chhaya [mailto:
> Chhaya.Vishwakarma@Thinkbiganalytics.com]
> *Sent:* 02 November 2015 PM 04:20
> *To:* user@hadoop.apache.org
> *Subject:* RE: Authenticating to Kerberos enabled Hadoop cluster using
> Java
>
>
>
> Thanks Niranjan It would be great if you can share a sample code if any?
>
>
>
> *From:* Niranjan Subramanian [mailto:niranjan@webaction.com
> <niranjan@webaction.com>]
> *Sent:* 02 November 2015 16:18
> *To:* user@hadoop.apache.org
> *Subject:* Re: Authenticating to Kerberos enabled Hadoop cluster using
> Java
>
>
>
> Hi Chhaya,
>
>
>
> You can use the UserGroupInformation class from org.apache.hadoop.security
> package.
>
>
>
> Specifically following 2 methods of that class
>
>
>
> UserGroupInformation.setConfiguration(hdfsConfiguration);
>
> UserGroupInformation.loginUserFromKeytab(principal, keytabPath);
>
>
>
> Regards,
>
> Niranjan
>
>
>
> On 02-Nov-2015, at 4:15 pm, Vishwakarma, Chhaya <
> Chhaya.Vishwakarma@Thinkbiganalytics.com> wrote:
>
>
>
> I have Kerberos enabled Hadoop cluster, I need to perform HDFS operations
> using JAVA code.
>
> I have keytab file and username can someone please suggest how can I
> autheticate to Kerberos using JAVA code?
>
> Regards,
>
> Chhaya
>
>
>
>
>

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