Plug-In very slow to load (first) applet - is IPv6 the problem?

Question

G'day,
I've previously reported a similar [problem on Windows 2000|http://forums.sun.com/thread.jspa] which is also affecting Vista (though not as extreme).
Each time the Plug-In is launched there is a long delay before the applet is started - during this period I simply see the animated Java logo, no change to its (empty) progress bar and no chatter on the Java Console (trace-level 5).
There is no delay starting the applet when reloading the page or when subsequently visiting other web-pages hosting applets. With the "next generation" Plug-In the JPI is sometimes shutdown and then later relaunched. The delay occurs each time the Plug-In is relaunched.
For example, when I visit [http://www.java.com/en/download/help/testvm.xml] the delay is 90 seconds on Vista (JRE6.0_12, IE7 & FF3) versus only 20 seconds on Linux (JRE6.0_12, FF3).
When I dump the running threads in the Console during the delay I noticed an IPv6 method call (stack trace shown at end) is always running - could it be the culprit?
I'll also try jstack as suggested in the other thread and report back.
Thanks,
Chris.
"thread applet-testvmDynamicJavaComPopUp819.class-1" prio=4 tid=0x043b8800 nid=0x1460 runnable [0x0587e000..0x0587fa68]
   java.lang.Thread.State: RUNNABLE
     at java.net.Inet6AddressImpl.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.SocketPermission.getIP(Unknown Source)
     at java.net.SocketPermission.getCanonName(Unknown Source)
     at java.net.SocketPermission.impliesIgnoreMask(Unknown Source)
     at java.net.SocketPermission.implies(Unknown Source)
     at java.security.CodeSource.matchLocation(Unknown Source)
     at java.security.CodeSource.implies(Unknown Source)
     at sun.security.provider.PolicyFile$8.run(Unknown Source)
     at java.security.AccessController.doPrivileged(Native Method)
     at sun.security.provider.PolicyFile.addPermissions(Unknown Source)
     at sun.security.provider.PolicyFile.getPermissions(Unknown Source)
     at sun.security.provider.PolicyFile.getPermissions(Unknown Source)
     at sun.security.provider.PolicyFile.getPermissions(Unknown Source)
     at sun.plugin2.applet.Plugin2ClassLoader.getPermissions(Unknown Source)
     at java.security.SecureClassLoader.getProtectionDomain(Unknown Source)
     - locked <0x2428f658> (a java.util.HashMap)
     at java.security.SecureClassLoader.defineClass(Unknown Source)
     at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     - locked <0x2427b178> (a sun.plugin2.applet.Applet2ClassLoader)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)
     at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source)
     at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)

Answer 1

Thanks SoCalGuy...I've been going nutzoid over this problem with the new Firefox 5 and later. Searched the internet and no credible solutions available. I've installed Firefox 6 beta 2 and same problem. Every time I shut down my computer and reboot, Firefox 5 (and higher) takes an eternity to start. No such issue with IE9 or Chrome. Been a long time fan of F/F but this has really tested my patience - no apparent fix and what has been suggested on the internet is a load of goobledygook. Hate to say it but unless F/F addresses this issue I might have to head north. Sob...