Hello experts, While running balancer utility as HDFS user i'm getting below error. HDFS Balancer - Access denied for user hdfs-prod. Superuser privilege is required Note - I'm running as user hdfs against a kerberized cluster. My principal name is hdfs-prod@ABC.NET dfs.permissions.superusergroup = hdfs and hdfs groups hdfs shows hdfs : hadoop hdfs I'm sure I'm missing something here. Thanks Mayank ... View more

Hello Gurus, One of our clients is asking for Zepplin and Kerberized the cluster. Below are my doubts (I have searched the forums however not found anything solid) 1) What is the current state of security around Zeppelin 2) Can we run Zellpin in a Kerberized environment. Thanks Mayank ... View more

Hello experts, I'm trying to understand the total size / block size used by HDFS Snapshot. I have a dir like /user/x/data and a hdfs ls tells me it has 1.1 TB So If I take a snapshot of /user/x/data will the snapshot consumes same space and how much block size is used by it. My earlier output from hdfs dfsadmin -report was 19.6 TB and after taking snapshot it was still same. If snapshots takes same space as of the source why the report does't changes. Thanks Mayank ... View more

Hello experts, I feel confident with Kerberos Authentication, however a recent article has created a panic among few customers, I would like to understand if there is a real threat and how others are thinking through it. http://news4security.com/posts/2015/12/old-microsoft-kerberos-vulnerability-gets-new-spotlight/ The article talks about various ways to attack Kerberos and obtain or pass forged tickets. Would be real helpful if security experts can clear the air, specially what these threat means in hadoop world (if any) Thanks Mayank ... View more