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https://issues.apache.org/jira/browse/HBASE-12943?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Kyle Purtell updated HBASE-12943:
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    Fix Version/s:     (was: 1.5.1)

> Set sun.net.inetaddr.ttl in HBase
> ---------------------------------
>
>                 Key: HBASE-12943
>                 URL: https://issues.apache.org/jira/browse/HBASE-12943
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Shaohui Liu
>            Assignee: Shaohui Liu
>            Priority: Major
>             Fix For: 3.0.0, 2.3.0, 1.6.0
>
>         Attachments: 12943-1-master.txt
>
>
> The default value of config: sun.net.inetaddr.ttl is -1 and the java 
> processes will cache the mapping of hostname to ip address  forever, See: 
> http://docs.oracle.com/javase/7/docs/technotes/guides/net/properties.html
> But things go wrong when a regionserver with same hostname and different ip 
> address rejoins the hbase cluster. The HMaster will get wrong ip address of 
> the regionserver from this cache and every region assignment to this 
> regionserver will be blocked for a time because the HMaster can't communicate 
> with the regionserver.
> A tradeoff is to set the sun.net.inetaddr.ttl to 10m or 1h and make the wrong 
> cache expired.
> Suggestions are welcomed. Thanks~



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