AnchorPane shows a white border when setResizable is false (JavaFX)

My problem is that when I use setResizable(false) one white border is shown on my scene. When I don’t set it false works fine, but I need to set it false.

Code:

 Scene scene = new Scene(new StackPane());  

        LoginManager loginManager = new LoginManager(scene);
        loginManager.showLoginScreen();
        primaryStage.setResizable(false);
        primaryStage.setScene(scene);
        primaryStage.show();

My ImageView is inside of my AnchorPane

<AnchorPane id="AnchorPane" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="600.0" prefWidth="900.0" xmlns:fx="http://javafx.com/fxml" fx:controller="br.com.facilit.target.app.desktop.view.MainViewController">
  <children>
    <ImageView id="background" fitHeight="600.0" fitWidth="900.0" pickOnBounds="true">
      <image>
        <Image url="@../images/background.jpg" preserveRatio="true" smooth="true" />
      </image>

Answer

I had the same issue, I resolved in this way:

primaryStage.setScene(scene);

primaryStage.setWidth(900);
primaryStage.setHeight(600);
primaryStage.setResizable(false);

primaryStage.show();

You have to set the scene before setting the resizable property and set the width/height manually. This has solved my problem.