Hi Greg,

Is it possible codebase is missing your JNLP file? As far as I know, codebase attribute in jnlp becomes required starting from J6u20. You can check the release notes:
http://java.sun.com/javase/6/webnotes/6u20.html

A Java Network Launch Protocol (JNLP) file without a codebase parameter, such as the following, will no longer work with the Java SE 6 update 20 release


Hope this helps.


Best Regards

David Gao ([email protected])

Greg Brown 写道:
FWIW, I just updated my wife's machine to J6u20 from J6u17. At first, the Stock 
Tracker app ran fine. However, once I cleared my cache of downloaded applets 
and applications, it failed to launch with the same error.

Sandro, you may want to try clearing your Java cache - this may allow you to 
reproduce the problem.


On May 26, 2010, at 8:00 PM, Greg Brown wrote:

Hi all,

I logged this issue the other day after discovering that I could not launch any 
signed Pivot demos via JNLP using J6u20 in either Windows XP or Mac OS X:

https://issues.apache.org/jira/browse/PIVOT-500

Sandro reports that he hasn't had any trouble running the apps, so I am wondering if it 
is something specific to my system. If you have J6u20 installed and have a moment, please 
try to run the JNLP demos and let me know what happens. You don't actually need to build 
and deploy Pivot 1.5 - you can just click on the Stock Tracker "Web Start" link 
on this page:

http://ixnay.biz/pivot-demos/

I get a NullPointerException in 
java.util.jar.JarVerifier.mapSignersToCodeSource(). I suspect that this is 
because we are using a self-signed cert, but I'm not sure.

Thanks for your help,
Greg



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