gistfile1.java

/*
Incorrect initialization
*/
public class MyContextLoaderListener extends ContextLoaderListener {

	@Override
	protected void customizeContext(ServletContext servletContext, ConfigurableWebApplicationContext applicationContext) {
		applicationContext.setParent(MySingleton.getContext());
	}
}

/*
Correct initialization of spring
*/
public class MyContextLoaderListener extends ContextLoaderListener {

	@Override
	protected ApplicationContext loadParentContext(ServletContext servletContext) {
		return MySingleton.getContext();
	}
}