FULL PRODUCT VERSION :
1.7_80
1.8_60
1.8_74


ADDITIONAL OS VERSION INFORMATION :
Windows Server 2012R2
Windows 8.1
Windows 7


A DESCRIPTION OF THE PROBLEM :
i use WebView  to show SQL Server Reports (SSRS) for my warehouse management system
the SSRS uses HTTP Authentication (fix with Authenticator)

in 2 older System this works like espected 
http://194.25.240.197:9980/ssrs.works.png
(uses java 1.7_x)

in the current system, we have made an upgrade to 1.8
i can open the Reports/ rendering is correctly
but after a whole time or change the settings ('Platz' / 'Intervall') or click on [View Report] 
an 401 error occurs http://194.25.240.197:9980/ssrs.401.png

i have created an simply FX Browser test class
the problem only occures in Java 1.8:
1.8_60 -> 401
1.8_74 -> 401
1.7_80 -> works

how i can debug / log URL Connections from WebView 

REGRESSION.  Last worked in version 8u74

ADDITIONAL REGRESSION INFORMATION: 
1.8_60 -> 401
1.8_74 -> 401
1.7_80 -> works


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
i use this test class
SQL Server Reporting Services

public class AmisTest extends Application {
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		launch(AmisTest.class, args);
	}

	/**
	 * @see javafx.application.Application#start(javafx.stage.Stage)
	 */
	@Override
	public void start(Stage primaryStage) throws Exception {
		Authenticator.setDefault(new Authenticator() {
			/**
			 * @see java.net.Authenticator#getPasswordAuthentication()
			 */
			@Override
			protected PasswordAuthentication getPasswordAuthentication() {
				return new PasswordAuthentication("<user>", "<pw>".toCharArray());
			}
		});
		
		final BorderPane root = new BorderPane();

		final WebView webView = new WebView();
		final WebEngine webEngine = webView.getEngine();
		webEngine.setJavaScriptEnabled(true);
		BorderPane.setMargin(webView, new Insets(2, 4, 4, 4));
		root.setCenter(webView);

		final TextField url = new TextField();
		url.setOnAction(new EventHandler<ActionEvent>() {
			
			@Override
			public void handle(ActionEvent event) {
				webEngine.load(url.getText());
			}
		});

		BorderPane.setMargin(url, new Insets(4, 4, 2, 4));
		root.setTop(url);

		primaryStage.setTitle(System.getProperty("java.runtime.version"));
		primaryStage.setScene(new Scene(root));
		primaryStage.show();
	}
}
---------- END SOURCE ----------