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Date: Thu, 15 Mar 2012 22:10:39 +0000 (UTC)
From: "Eli Collins (Created) (JIRA)" <jira@apache.org>
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Subject: [jira] [Created] (HBASE-5587) Remove dns.interface configuration
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Remove dns.interface configuration options 
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                 Key: HBASE-5587
                 URL: https://issues.apache.org/jira/browse/HBASE-5587
             Project: HBase
          Issue Type: Improvement
            Reporter: Eli Collins


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.

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