This page last changed on Mar 20, 2009 by scytacki.

If there are certain comments in a jnlp, then it won't properly load.

Here is an example of a comment that caused issues.

<!-- generated by org.concord.JnlpServletCacher -->
<!-- original url: -->

The first time this jnlp was loaded the following error was thrown:

Exception in thread "javawsApplicationMain" java.lang.NullPointerException
        at java.lang.ProcessBuilder.start(
        at java.lang.Runtime.exec(
        at java.lang.Runtime.exec(
        at com.sun.javaws.Launcher.execProgram(
        at com.sun.javaws.Launcher.handleApplicationDesc(
        at com.sun.javaws.Launcher.handleLaunchFile(

This occured on a 10.4 mac running latest Java:

java version "1.5.0_16"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_16-b06-275)
Java HotSpot(TM) Client VM (build 1.5.0_16-132, mixed mode, sharing)
Document generated by Confluence on Jan 27, 2014 16:56