Perhaps you're getting bit by Java's default DNS caching? http://www.rgagnon.com/javadetails/java-0445.html http://java.sun.com/j2se/1.5.0/docs/guide/net/properties.html # # The Java-level namelookup cache policy for successful lookups: # # any negative value: caching forever # any positive value: the number of seconds to cache an address for # zero: do not cache # # default value is forever (FOREVER). For security reasons, this # caching is made forever when a security manager is set. # # NOTE: setting this to anything other than the default value can have # serious security implications. Do not set it unless # you are sure you are not exposed to DNS spoofing attack. # #networkaddress.cache.ttl=-1 View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4073138#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...