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Posted to common-dev@hadoop.apache.org by "Junping Du (JIRA)" <ji...@apache.org> on 2012/04/23 12:37:35 UTC
[jira] [Created] (HADOOP-8304) DNSToSwitchMapping should add
interface to resolve individual host besides a list of host
Junping Du created HADOOP-8304:
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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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