[HADOOP-8878] uppercase namenode hostname causes hadoop dfs calls with webhdfs filesystem and fsck to fail when security is on

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.0.3, 1.1.0, 1.2.0, 3.0.0-alpha1
• Fix Version/s: 1.1.1, 2.0.3-alpha, 0.23.7
• Hadoop Flags: Reviewed
• Assignee: Arpit Gupta
• Reporter: Arpit Gupta
• Created: 04/Oct/12 00:46
• Updated: 12/May/16 18:23
• Resolved: 11/Oct/12 06:39

Description

This was noticed on a secure cluster where the namenode had an upper case hostname and the following command was issued

hadoop dfs -ls webhdfs://NN:PORT/PATH

the above command failed because delegation token retrieval failed.

Upon looking at the kerberos logs it was determined that we tried to get the ticket for kerberos principal with upper case hostnames and that host did not exit in kerberos. We should convert the hostnames to lower case. Take a look at HADOOP-7988 where the same fix was applied on a different class.

I have noticed this issue exists on branch-1. Will investigate trunk and branch-2 and update accordingly.

Issue Links

• is depended upon by: HADOOP-8882 uppercase namenode host name causes fsck to fail when useKsslAuth is on
• relates to: HADOOP-7988 Upper case in hostname part of the principals doesn't work with kerberos.