Today’s big thing is the following java property;

-Dsun.net.spi.nameservice.provider.<n>= file || dns || dnsjava || nis ||...

We have been troubling by host-name resolving problem with Apache Tomcat for a while. 5 min ago we found that property and applied

-Dsun.net.spi.nameservice.provider.1= file,dns,dnsjava

to Tomcat’s catalina.sh (Path = %CATALINA_HOME%/bin/catalina.sh)

And all is ok.

PS: For more Java networking properties you may take a look  http://java.sun.com/j2se/1.4.2/docs/guide/net/properties.html