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You might want to try the latest jdk7 release at http://jdk7.java.net/download.html
Installed 1.7.10 and rebuilt [and made .10 java default]. The web start embedded in the jsp now just gets the spinning circle icon and does nothing. The only entry in the trace file is: Log started: Fri, 30 Nov 2012 08:44:33 -0600
Going to try 1.7.9
ahh.. should have mentioned that the one line from trace file was 'plugin....trace' not 'javaws...trace'. Also see this in jcp.trace ['jcp' is alias keystore, I think].
java.io.FileNotFoundException: C:\Users\dcalvin\AppData\LocalLow\Sun\Java\Deployment\cache\6.0\53\4f414575-3bd1f472 (The system cannot find the file specified)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(Unknown Source)
at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(Unknown Source)
at com.sun.javaws.CacheUtil.getExcludedCacheEntries(Unknown Source)
okay.. after a little research, I find the NPE may be occuring because either the class LaunchDesc has either a missing "_originaURL" [returned by getSourceURL()] or _version [set by constructor]. This is doing 'relaunch' [see original post]. Maybe the good guys at Oracle can tell me what I am missing [like should I have javafx.properties in my class path?].
The tracing is profuse and could be confusing. Don't pay attention to the "toolkit not match" message. It is normal output for the launching of java fx apps at this time.
Your NPE stack indicate this bug http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7191889. The bug typically happens to JNLP files without <jnlp href="some.jnlp"... attribute. If this is the case, try work-around by adding the attribute.