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From "Eli Collins (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-8154) DNS#getIPs shouldn't silently return the local host IP for bogus interface names
Date Thu, 08 Mar 2012 20:07:57 GMT
DNS#getIPs shouldn't silently return the local host IP for bogus interface names
--------------------------------------------------------------------------------

                 Key: HADOOP-8154
                 URL: https://issues.apache.org/jira/browse/HADOOP-8154
             Project: Hadoop Common
          Issue Type: Bug
          Components: conf
            Reporter: Eli Collins
            Assignee: Eli Collins


DNS#getIPs silently returns the local host IP for bogus interface names. In this case let's
throw an UnknownHostException. This is technically an incompatbile change. I suspect the current
behavior was origininally introduced so the interface name "default" works w/o explicitly
checking for it. It may also be used in cases where someone is using a shared config file
and an option like "dfs.datanode.dns.interface" or "hbase.master.dns.interface" and eg interface
"eth3" that some hosts don't have, though I think silently ignorning this is the wrong behavior
(those hosts should be configured to use a different interface).

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