java.lang.reflect.InvocationTargetException error in tutorial
===

I'm in the process of learning about Java EE, Glassfish and EJBs by following [this excellent tutorial](http://programming.manessinger.com/tutorials/an-eclipse-glassfish-java-ee-6-tutorial/).

I'm stuck at section 9.i . I got the java.lang.reflect.InvocationTargetException error the author mentioned and did the same fixes he did. However, I still get the same error and I've been looking for an answer for quite some time now. Here's what I tried.

persistence.xml

    <?xml version="1.0" encoding="UTF-8"?>
    <persistence version="2.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">
    	<persistence-unit name="cookbookEJB">
    		<jta-data-source>jdbc/cookbook</jta-data-source>
    		<class>com.davidlacerte.cookbook.entity.City</class>
    		<class>com.davidlacerte.cookbook.entity.Country</class>
    		<properties>
    			<property name="eclipselink.logging.level" value="FINE"/>
    		</properties>
    	</persistence-unit>
    </persistence>

My Glassfish install does have a jdbc/cookbook JDBC resource. Now, I added the following code because the Glassfish stack trace was less than helpful:

	@Override
	public long countryCount() {
		try
		{
		return eao.countCountries();
		}
		catch(Exception e)
		{
			Throwable t = e.getCause();
			
			while(t != null)
			{
				System.out.println(t.getMessage());
				t = t.getCause();
			}
		}
		
		return -1;
	}

Here's the output:

    INFO: Exception thrown from bean: java.lang.VerifyError: Expecting a stackmap frame at branch target 16 in method com.davidlacerte.cookbook.entity.City._persistence_checkFetched(Ljava/lang/String;)V at offset 5
    INFO: Expecting a stackmap frame at branch target 16 in method com.davidlacerte.cookbook.entity.City._persistence_checkFetched(Ljava/lang/String;)V at offset 5

I googled the "Excepting a stackmap frame..." error, many blogs suggested adding a ` -XX:-UseSplitVerifier` parameter to my VM arguments : I did, no luck.

So, that's all I know and all I've tried for now. As I said I don't know much about EJB and Glassfish so if you need more info, just ask. I'm going slightly mad, here.

Thank you for your help.