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
       "  D:\\data\\Desktop\\cluster-test\\conf\\hdfs.keytab");


Note: Above 2 lines should be at the beginning  in your application.



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]
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.loginUserFromKeytab(principal, keytabPath);





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?