FULL PRODUCT VERSION :
Java(TM) SE Runtime Environment (build 9-ea+111)
Java HotSpot(TM) Client VM (build 9-ea+111, mixed mode)


A DESCRIPTION OF THE PROBLEM :
A small WebStart client throws a ClassNotFoundException despite compiling properly - it also executes correct with the Java 9 JRE when execute normally.

Seems similar to JI-9033432 but the error is different, this bug doesn't talk about module exports.

REGRESSION. Last worked in version 9

ADDITIONAL REGRESSION INFORMATION:
Java(TM) SE Runtime Environment (build 9-ea+111)
Java HotSpot(TM) Client VM (build 9-ea+111, mixed mode)


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Deploy the suggested class as a webstart client

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The webstart application should execute normally
ACTUAL -
ClassNotFoundException

ERROR MESSAGES/STACK TRACES THAT OCCUR :
java.lang.ClassNotFoundException: javax.xml.bind.JAXBException
at com.sun.deploy.security.DeployURLClassLoader.findClass(jdk.deploy@9-ea/DeployURLClassLoader.java:301)
at com.sun.jnlp.JNLPClassLoader.findClass(jdk.javaws@9-ea/JNLPClassLoader.java:372)
at java.lang.ClassLoader.loadClass(java.base@9-ea/ClassLoader.java:486)
at java.lang.ClassLoader.loadClass(java.base@9-ea/ClassLoader.java:419)
at Test.main(Test.java:5)
at sun.reflect.NativeMethodAccessorImpl.invoke0(java.base@9-ea/Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(java.base@9-ea/NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(java.base@9-ea/DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(java.base@9-ea/Method.java:531)
at com.sun.javaws.Launcher.executeApplication(jdk.javaws@9-ea/Launcher.java:1780)
at com.sun.javaws.Launcher.executeMainClass(jdk.javaws@9-ea/Launcher.java:1715)
at com.sun.javaws.Launcher.doLaunchApp(jdk.javaws@9-ea/Launcher.java:1563)
at com.sun.javaws.Launcher.run(jdk.javaws@9-ea/Launcher.java:164)
at java.lang.Thread.run(java.base@9-ea/Thread.java:804)


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import javax.xml.bind.JAXBException;

public class Test {
        public static void main(String[] args) {
                new JAXBException("");
        }
}

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
None found