[ACCUMULO-4416] MAC failures when running on host configured with mixed-case hostname

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Cannot Reproduce
• Affects Version/s: 1.7.1
• Component/s: test
• Assignee: Josh Elser
• Reporter: Josh Elser
• Created: 19/Aug/16 22:36
• Updated: 23/Apr/19 23:20
• Resolved: 23/Apr/19 23:20

Description

HADOOP-7988

Kerberos is case-sensitive. DNS is not. I saw a case where a host with mixed-case hostname had a MAC instance that fell over because of a spam of failed RPCs that never succeeded.

MiniKDC and our code seems to be doing the right thing, but somehow a lower-case on the hostname we were using on the client to communicate with the tserver happened. I'm not sure what component did this. Should look into this with some VM configured with a mixed-case hostname.