[HBASE-5587] Remove dns.interface configuration options

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: 0.95.2
• Hadoop Flags: Incompatible change
• Assignee: Unassigned
• Reporter: Eli Collins
• Created: 15/Mar/12 22:10
• Updated: 13/Jun/22 15:37
• Resolved: 11/Apr/15 01:24

Description

Are the hbase.*.dns.interface configuration options used or needed? Per HBASE-4109 it looks like these never really worked, at least in cases where the hostname with a trailing dot doesn't resolve. The reason I asked is that while these were introduced in Hadoop, I don't think they're actually used, nor am I convinced bypassing the host for DNS lookups is a good idea (leads to painful bugs where default Java DNS lookups differ with these lookups). HBase started using these via a similar feature in HBASE-1279 and HBASE-1279.

I filed HADOOP-8156 to remove the API which HBase uses, which is obviously an incompatible change and would need to be worked around here if you wanted to keep this functionality in HBase, ie if that were to get checked into Hadoop we'd first need to get you on your own DNS class. Either way I'll update DNS' InterfaceAudience annotation to indicate HBase is a user.

Issue Links

• is related to: HADOOP-8156 Remove ability to specify a custom nameserver for an interface in DNS.java