There is a problem with hostname resolution for domain names.
Applications started as JNLP and contains unsiged jar files.

The user tries to connect to an external address and is asked to allow
this connection. The socket connection should be opened and a hostname
resolution is done by Java. For domain names of the www, the call takes
about 30 seconds before the application can connect.

If the same application run local (not Java Webstart) ) on the same hardware
and there is no hanging.
Also if the address is a LAN address then there
is no hanging.

How can prevent this timeout?

Configuration:
==============
Java Web Start 1.6.0_20
JRE-Version 1.6.0_20-b02 Java HotSpot(TM) Server VM
OS: Window XP and Ubuntu

Steps to reproduce:
===================
Test program has been attached. codebase need to be changed in the jnlp file.
If start the jnlp file then it will need 20 seconds. If start the batch file
then it only need 25 milliseocnds.

Hints to help:
==============
The domain in the test case does not have a revers lockup.
If you use a domain with a reverse lookup then it is faster.


Below you will find the stacktrace where the applications hangs. The
packages org.apache.commons.httpclient and org.apache.webdav.lib are
located in unsigned jar files.

    java.lang.Thread.State: RUNNABLE
     at java.net.Inet6AddressImpl.getHostByAddr(Native Method)
     at java.net.InetAddress$1.getHostByAddr(InetAddress.java:854)
     at java.net.InetAddress.getHostFromNameService(InetAddress.java:534)
     at java.net.InetAddress.getHostName(InetAddress.java:477)
     at java.net.SocketPermission.getCanonName(SocketPermission.java:633)
     at
java.net.SocketPermission.impliesIgnoreMask(SocketPermission.java:956)
     at
java.net.SocketPermissionCollection.implies(SocketPermission.java:1317)
     - locked <0xa4b8aaa0> (a java.net.SocketPermissionCollection)
     at java.security.Permissions.implies(Permissions.java:166)
     - locked <0xa4b8a9f8> (a java.security.Permissions)
     at sun.security.provider.PolicyFile.implies(PolicyFile.java:1126)
     at java.security.ProtectionDomain.implies(ProtectionDomain.java:224)
     at
java.security.AccessControlContext.checkPermission(AccessControlContext.java:301)
     at
java.security.AccessController.checkPermission(AccessController.java:546)
     at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
     at java.lang.SecurityManager.checkConnect(SecurityManager.java:1031)
     at
com.sun.javaws.security.JavaWebStartSecurity.checkConnect(JavaWebStartSecurity.java:117)
     at java.net.InetAddress.getAllByName0(InetAddress.java:1146)
     at java.net.InetAddress.getAllByName(InetAddress.java:1084)
     at java.net.InetAddress.getAllByName(InetAddress.java:1020)
     at java.net.InetAddress.getByName(InetAddress.java:970)
     at com.sun.jnlp.ApiDialog.askConnect(ApiDialog.java:86)
     at
com.sun.javaws.security.JavaWebStartSecurity.checkConnect(JavaWebStartSecurity.java:132)
     at java.net.InetAddress.getAllByName0(InetAddress.java:1146)
     at java.net.InetAddress.getAllByName(InetAddress.java:1084)
     at java.net.InetAddress.getAllByName(InetAddress.java:1020)
     at java.net.InetAddress.getByName(InetAddress.java:970)
     at java.net.InetSocketAddress.<init>(InetSocketAddress.java:124)
     at java.net.Socket.<init>(Socket.java:249)
     at
org.apache.commons.httpclient.protocol.DefaultProtocolSocketFactory.createSocket(DefaultProtocolSocketFactory.java:79)
     at
org.apache.commons.httpclient.protocol.DefaultProtocolSocketFactory.createSocket(DefaultProtocolSocketFactory.java:121)
     at
org.apache.commons.httpclient.HttpConnection.open(HttpConnection.java:706)
     at
org.apache.commons.httpclient.HttpMethodDirector.executeWithRetry(HttpMethodDirector.java:386)
     at
org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:170)
     at
org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:396)
     at
org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:324)
     at
org.apache.webdav.lib.WebdavResource.propfindMethod(WebdavResource.java:3526)
     at
org.apache.webdav.lib.WebdavResource.propfindMethod(WebdavResource.java:3491)
     at
org.apache.webdav.lib.WebdavResource.setNamedProp(WebdavResource.java:976)
     at
org.apache.webdav.lib.WebdavResource.setBasicProperties(WebdavResource.java:921)
     at
org.apache.webdav.lib.WebdavResource.setProperties(WebdavResource.java:1925)
     at
org.apache.webdav.lib.WebdavResource.setProperties(WebdavResource.java:1948)
     at com.inet.report.repository.davclient.a.<init>(SourceFile:34)
     at
com.inet.report.repository.davclient.WebDavConnector.getRootFolder(SourceFile:210)
     at com.inet.designer.e.d.call(SourceFile:269)
     at
com.inet.lib.swing.progress.ProgressRunner$2$1.doInBackground(SourceFile:128)
     at org.jdesktop.swingworker.SwingWorker$1.call(Unknown Source)