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Posted to issues@hbase.apache.org by "Ted Yu (JIRA)" <ji...@apache.org> on 2015/11/04 23:20:27 UTC
[jira] [Updated] (HBASE-14706) RegionLocationFinder should return
multiple servernames by top host
[ https://issues.apache.org/jira/browse/HBASE-14706?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Ted Yu updated HBASE-14706:
---------------------------
Summary: RegionLocationFinder should return multiple servernames by top host (was: RegionLocationFinder should return multiple servername by top host)
> RegionLocationFinder should return multiple servernames by top host
> -------------------------------------------------------------------
>
> Key: HBASE-14706
> URL: https://issues.apache.org/jira/browse/HBASE-14706
> Project: HBase
> Issue Type: Bug
> Components: Balancer
> Affects Versions: 2.0.0, 1.2.0, 1.3.0
> Reporter: Guanghao Zhang
> Assignee: Guanghao Zhang
> Fix For: 2.0.0, 1.2.0, 1.3.0
>
> Attachments: HBASE-14706-trunk_v1.patch, HBASE-14706-trunk_v2.patch, HBASE-14706-trunk_v3.patch, HBASE-14706-trunk_v4.patch, HBASE-14706.patch
>
>
> Multiple RS can run on the same host. But in current RegionLocationFinder, mapHostNameToServerName map one host to only one server. This will make LocalityCostFunction get wrong locality about region.
> {code}
> // create a mapping from hostname to ServerName for fast lookup
> HashMap<String, ServerName> hostToServerName = new HashMap<String, ServerName>();
> for (ServerName sn : regionServers) {
> hostToServerName.put(sn.getHostname(), sn);
> }
> {code}
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