FULL PRODUCT VERSION :
java version "1.8.0_111"
Java(TM) SE Runtime Environment (build 1.8.0_111-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.111-b14, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Linux Mint 18

A DESCRIPTION OF THE PROBLEM :
The ExceptionDialog example from here http://code.makery.ch/blog/javafx-dialogs-official/
will not show the full expandable content when pressing the show details button. It truncates.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run the supplied test code which is based off the ExceptionDialog example here http://code.makery.ch/blog/javafx-dialogs-official/

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The expandable content of the alert should show fully.
ACTUAL -
The expandable content is truncated.

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.io.StringWriter;

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Alert;
import javafx.scene.control.Alert.AlertType;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.TextArea;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.Priority;
import javafx.stage.Stage;

public class DialogTest extends Application
{

    public static void main(
        String[] args)
    {
        launch(args);
    }

    @Override
    public void start(
        Stage primaryStage)
    {
        primaryStage.setTitle("DialogTest");

        Button button = new Button("Show Dialog");
        BorderPane panel = new BorderPane();
        panel.setCenter(button);

        button.setOnAction(actionEvent ->
        {
            showDialog();
        });

        Scene scene = new Scene(panel, 200, 200);
        primaryStage.setScene(scene);
        primaryStage.show();
    }
    
    private void showDialog()
    {
        Alert alert = new Alert(AlertType.ERROR);
        alert.setTitle("Exception Dialog");
        alert.setHeaderText("Look, an Exception Dialog");
        alert.setContentText("Could not find file blabla.txt!");

        Exception ex = new FileNotFoundException("Could not find file blabla.txt");

        // Create expandable Exception.
        StringWriter sw = new StringWriter();
        PrintWriter pw = new PrintWriter(sw);
        ex.printStackTrace(pw);
        String exceptionText = sw.toString();

        Label label = new Label("The exception stacktrace was:");

        TextArea textArea = new TextArea(exceptionText);
        textArea.setEditable(false);
        textArea.setWrapText(true);

        textArea.setMaxWidth(Double.MAX_VALUE);
        textArea.setMaxHeight(Double.MAX_VALUE);
        GridPane.setVgrow(textArea, Priority.ALWAYS);
        GridPane.setHgrow(textArea, Priority.ALWAYS);

        GridPane expContent = new GridPane();
        expContent.setMaxWidth(Double.MAX_VALUE);
        expContent.add(label, 0, 0);
        expContent.add(textArea, 0, 1);

        // Set expandable Exception into the dialog pane.
        alert.getDialogPane().setExpandableContent(expContent);

        alert.showAndWait();
    }
}
---------- END SOURCE ----------