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From "Junping Du (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-8304) DNSToSwitchMapping should add interface to resolve individual host besides a list of host
Date Mon, 23 Apr 2012 10:37:35 GMT
Junping Du created HADOOP-8304:
----------------------------------

             Summary: DNSToSwitchMapping should add interface to resolve individual host besides
a list of host
                 Key: HADOOP-8304
                 URL: https://issues.apache.org/jira/browse/HADOOP-8304
             Project: Hadoop Common
          Issue Type: Improvement
          Components: io
    Affects Versions: 1.0.0, 2.0.0
            Reporter: Junping Du
            Assignee: Junping Du
             Fix For: 2.0.0


DNSToSwitchMapping now has only one API to resolve a host list: public List<String>
resolve(List<String> names). But the two major caller: RackResolver.resolve() and DatanodeManager.resolveNetworkLocation()
are taking single host name but have to wrapper it to an single entry ArrayList. This is not
necessary especially the host has been cached before.

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