FULL PRODUCT VERSION :
OpenJDK Runtime Environment (build 1.8.0_151-8u151-b12-0ubuntu0.16.04.2-b12)
OpenJDK 64-Bit Server VM (build 25.151-b12, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Linux walter-Precision-Tower-3620 4.4.0-93-generic #116-Ubuntu SMP Fri Aug 11 21:17:51 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux


A DESCRIPTION OF THE PROBLEM :
Program runs as standard java app but when downloaded via java web start the jnlp bundle bombs out
with the following dump

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at net.sourceforge.jnlp.Launcher.launchApplication(Launcher.java:574)
... 1 more
Caused by: java.lang.NoClassDefFoundError: com/brookgreenconsulting/API/FormInterface
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
at java.lang.ClassLoader.defineClass(ClassLoader.java:642)
at com.brookgreenconsulting.API.BinaryClassLoader.findClass(BinaryClassLoader.java:30)
at com.brookgreenconsulting.API.API.LoadForm(API.java:174)
at com.brookgreenconsulting.FormsApplet.Applet.main(Applet.java:82)
... 6 more
Caused by: java.lang.ClassNotFoundException: com.brookgreenconsulting.API.FormInterface
at java.lang.ClassLoader.findClass(ClassLoader.java:530)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 12 more

The same program with the same jars runs fine from the command line with straight java (not javaws)

The following code snippit shows the code in question:

12public class BinaryClassLoader extends java.lang.ClassLoader
{
   
    
16 public BinaryClassLoader(ClassLoader parent)
    {
        super(parent);
    }
    
    protected Class findClass(String name, byte[] binary)
    {
        try
        {
            Class foundClass = Class.forName(name);
            return foundClass;
        }
        catch (ClassNotFoundException e)
        {
 30 Class c =defineClass(name, binary, 0, binary.length);
            resolveClass(c);
            return c;
        }
    }
    
   
}


clearly the dump indicates that the required class ~API.FormInterface was not found but it is clearly
within a loaded jar, since it is the same jar as the class com.brookgreenconsulting.API, from which
the call was executed as per the dump

The contents of this jar is as follows:

META-INF/MANIFEST.MF
META-INF/APPLET.SF
META-INF/APPLET.DSA
META-INF/
com/
com/brookgreenconsulting/
com/brookgreenconsulting/API/
com/brookgreenconsulting/API/API.class
com/brookgreenconsulting/API/BinaryClassLoader.class
com/brookgreenconsulting/API/FormInterface.class
com/brookgreenconsulting/API/HttpClient.class
com/brookgreenconsulting/API/Utility.class

clearly the javaws should have properly loaded my user defined binary class, as standard java does

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
java program under javaws should have run without exception
ACTUAL -
class not found exception thrown while user defined binary class is loaded

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
public class BinaryClassLoader extends java.lang.ClassLoader
{
   
    
    public BinaryClassLoader(ClassLoader parent)
    {
        super(parent);
    }
    
    protected Class findClass(String name, byte[] binary)
    {
        try
        {
            Class foundClass = Class.forName(name);
            return foundClass;
        }
        catch (ClassNotFoundException e)
        {
            Class c =defineClass(name, binary, 0, binary.length);
            resolveClass(c);
            return c;
        }
    }
    
   
}

Note required jar files e-mailed upon request
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
None known can't try on version 9 since executable is self signed