InetAddress should utilize networkaddress.cache.ttl for getLocalHost() too (original) (raw)

Alan Bateman Alan.Bateman at oracle.com
Wed Jul 11 00:00:04 PDT 2012

On 05/07/2012 07:10, Deven You wrote:

Hi All,

I noticed that InetAddress.getLocalHost() uses cache to improve the performance. However the default implementation is caching local host within 5 seconds. From the spec, networkaddress.cache.ttl should be used to control the cache behaviour and I think it is a better solution. For example, if the networkaddress.cache.ttl is set to -1 which means always cache the local host then we can avoid unnecessary operations on getAddressesFromNameService to improve the performance. I have made a patch for this solution, so anyone would like to take a look? [1] http://cr.openjdk.java.net/~littlee/OJDK-527/webrev.00/ <http://cr.openjdk.java.net/%7Elittlee/OJDK-527/webrev.00/> Thanks a lot! -- Best Regards, Deven I'm not sure about this one as I suspect it will cause problems in DHCP or any environments where the host addresses changes, say moving to a different wireless network or waking up a machine after hibernation.

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