Thank you for your support ... View more

Thanks for your support ... View more

Thanks for your response   so Stop cluster means - it will stop all the components right(include bothe namenodes and other components like soop, hive, yarn etc....) ? if i am not wrong...     ... View more

Thank you!   kerberos configured successfully  bue when i am trying to execute commands, i was not able work wiht my cluster as i am getting below error please help     [hdfs@cn1 ~]$ hdfs dfsadmin -safemode get 18/03/31 09:16:48 WARN security.UserGroupInformation: PriviledgedActionException as:hdfs (auth:KERBEROS) cause:javax.security.sasl.SaslException: GSS initiate failed [Caused by GSSException: No valid credentials provided (Mechanism level: Failed to find any Kerberos tgt)] 18/03/31 09:16:48 WARN ipc.Client: Exception encountered while connecting to the server : javax.security.sasl.SaslException: GSS initiate failed [Caused by GSSException: No valid credentials provided (Mechanism level: Failed to find any Kerberos tgt)] 18/03/31 09:16:48 WARN security.UserGroupInformation: PriviledgedActionException as:hdfs (auth:KERBEROS) cause:java.io.IOException: javax.security.sasl.SaslException: GSS initiate failed [Caused by GSSException: No valid credentials provided (Mechanism level: Failed to find any Kerberos tgt)] safemode: Failed on local exception: java.io.IOException: javax.security.sasl.SaslException: GSS initiate failed [Caused by GSSException: No valid credentials provided (Mechanism level: Failed to find any Kerberos tgt)]; Host Details : local host is: "cn1.hadoop.com/192.168.56.121"; destination host is: "cn1.hadoop.com":8020;             Thanks Balaji Vemula ... View more

Thank you so much, issue is as you said encryption type, i added default one and issue got fixed ... View more

i configured the kerberos manually as below and enabled kerberos from CM $ yum install krb5-server krb5-libs krb5-workstation Updated the krb5.conf with below config default_realm = HADOOP.COM [realms] HADOOP.COM = { kdc = cm.hadoop.com admin_server = cm.hadoop.com } [domain_realm] .hadoop.com = HADOOP.COM hadoop.com = HADOOP.COM and then installed kerberos libs and workstation pkgs areinstalled in all client machines and copied the krb5.conf file to all hosts Used kdb5_util create -s to create a KDC database and it went well next step created the principle kadmin.local -q "addprinc admin/admin" and created successfully then granted the access in /var/kerberos/krb5kdc/ file and started the both services krb5kdc,kadmin then i have verified whether its working or not usint kinit kinit root/admin@HADOOP.COM and it has got the TGT successfully now i have logged into CM and from administartion option enabled the kerberos and getting the error as my first post   also one more doubt, do we require to configure AD or LDAP before enabling kerberos ??   Thanks Balaji    ... View more