Disabling DNS Caching for Weblogic Server JVM

Weblogic Server doesn't cache any DNS. Rather, it's the Java implementation that caches the DNS. So when a 
Weblogic domain is restarted, each node in the domain caches the DNS with IP Address of Admin/Managed node 
so any subsequent operation will use the old settings even if the real settings have changed. To reset everything, 
you have to restart the Admin/Managed node since the default JVM setting is to cache forever.

This post is very useful in an Organization where the Application Servers move consistently and configuration of DNS gets changed like IP Address.

Would it be possible to control this behavior in the Weblogic Server configuration?

There are 4 properties that can be used to override the default behaviour.

networkaddress.cache.ttl (default: -1)
    Specified in java.security to indicate the caching policy for successful 
    name lookups from the name service. The value is specified as as integer 
    to indicate the number of seconds to cache the successful lookup.

    A value of -1 indicates "cache forever".

networkaddress.cache.negative.ttl (default: 10)
    Specified in java.security to indicate the caching policy for un-successful
    name lookups from the name service. The value is specified as as integer to 
    indicate the number of seconds to cache the failure for un-successful lookups.

    A value of 0 indicates "never cache". A value of -1 indicates "cache forever". 

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. 

sun.net.inetaddr.negative.ttl
    This is a sun private system property which corresponds to networkaddress.cache.negative.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.  

You can disable DNS caching by adding -Dsun.net.inetaddr.ttl=0 as JAVA_OPTION to your Server start-up script

Note: You can't set the value of networkaddress.cache.ttl as a JAVA_OPTION. You can set the required value in the java.security file located in %JRE%\lib\security