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From Michael Ludwig <mil...@gmx.de>
Subject Re: SOT: JVM and DNS Failover
Date Fri, 03 Dec 2010 19:31:35 GMT
Moin Jordan,

Jordan Michaels schrieb am 03.12.2010 um 10:39 (-0800):

> Would any of you be able to point me to some documentation on how
> the JVM handles DNS resolving? I'm hoping there are JVM settings
> that can be tweaked to help force the JVM to fail over to the
> secondary resolver.
> 
> I'm using version 1.6 JVM.

Networking Properties
http://download.oracle.com/javase/6/docs/technotes/guides/net/properties.html#nct

  networkaddress.cache.ttl

  […] A value of -1 indicates "cache forever". The default behavior
  is to cache forever when a security manager is installed, and to
  cache for an implementation specific period of time, when a
  security manager is not installed.

So have you installed a security manager?

Wondering myself what the default value is?

  sun.net.inetaddr.ttl

  This is a sun private system property which corresponds to
  networkaddress.cache.ttl. It takes the same value and has the
  same meaning, but can be set as a command-line option. However,
  the preferred way is to use the security property mentioned
  above.

Still wondering. So is the "implementation specific period of time"
the value taken from the OS?

-- 
Michael Ludwig

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