Jaws throws UnknownHostException when the application hosted on internet is launched

Tested OS : All
Tested Build : mustang build 50

1. Install mustang build 50
2. Launch Java Control Panel
3. In the advanced tab, enable tracing, logging and choose show java console
4. Launch any application from net
( ./javaws http://java.sun.com/products/javawebstart/apps/notepad.jnlp
      or
  ./javaws http://www.chemaxon.com/marvin/jnlp/mview.jnlp )

UnknownHostException is thrown in Java Console and the application is launched

java.net.UnknownHostException: java.sun.com (or www.chemaxon.com)
at java.net.Inet4AddressImpl.lookupAllHostAddr(Native Method)
at java.net.InetAddress$1.lookupAllHostAddr(Unknown Source)
at java.net.InetAddress.getAddressFromNameService(Unknown Source)
at java.net.InetAddress.getAllByName0(Unknown Source)
at java.net.InetAddress.getAllByName0(Unknown Source)
at java.net.InetAddress.getAllByName(Unknown Source)
.
.
.

Note : The above exception is happening from mustang build 50