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Posted to common-dev@hadoop.apache.org by "Eli Collins (Created) (JIRA)" <ji...@apache.org> on 2012/03/08 21:07:57 UTC

[jira] [Created] (HADOOP-8154) DNS#getIPs shouldn't silently return the local host IP for bogus interface names

DNS#getIPs shouldn't silently return the local host IP for bogus interface names
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                 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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