Resource leak using es2 renderer on X11 and Mesa

[Seeky90]

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There seems to be a resource leak in JavaFX on linux. The issue leads to the X window becoming very unresponsive, the effect is increasing over time.

Used: Linux kernel 4.13.0-39 Mesa 18.0.5 X Server 1.18.4 javafx-sdk-11.0.2 jdk-11.0.2

Start the program like this: java --module-path $PATH_TO_FX --add-modules=javafx.controls HelloProgressIndicator

Make sure that ES2 pipeline is used for rendering, the issue only occurs there.

Use the tool xrestop to monitor the resources of the X server A process without PID will appear, adding some K memory every few seconds. The X server process cpu load will increase from low load to about 90% over time. After the program is running for about 1 hour a significant frame drop can be noticed in all programs running in the same X session. If the HelloProgressIndicator is minimized everything runs smooth again. Killing HelloProgressIndicator forcefully causes the X server to freeze for a time which depends on how long the program ran before.

Using -Dquantum.singlethreaded=true makes the issue disappear.

The following code can be used:

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.ProgressIndicator;
import javafx.stage.Stage;

public class HelloProgressIndicator extends Application {

    ProgressIndicator progress = new ProgressIndicator(-1);

    @Override
    public void start(Stage primaryStage) throws Exception {
        primaryStage.setScene(new Scene(progress, 100, 100));
        progress.setVisible(true);
        primaryStage.show();
    }

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

}

[Hoimar]

I'm experiencing the same bug. The issue seems to be that insane amounts of VRAM are allocated and then swapped out to the RAM which in turn fills that up until the system becomes completely unresponsive. This is reproducible on my system by running any JavaFX App, and it leaks much faster when there are animated components, e.g. above example, or a program with a Label that has a Transition (below), etc.

Running the program normally:

GALLIUM_HUD=fps,requested-VRAM,VRAM-usage java --module-path /home/valentin/Quellcode/Javafx-SDK/lib/ --add-modules javafx.base,javafx.controls,javafx.graphics,javafx.fxml,javafx.media -jar MyFXApp.jar

Result: System quickly runs out of RAM (+swap) after that.

Running it with the -Dquantum.singlethreaded=true flag:

GALLIUM_HUD=fps,requested-VRAM,VRAM-usage java -Dquantum.singlethreaded=true --module-path /home/valentin/Quellcode/Javafx-SDK/lib/ --add-modules javafx.base,javafx.controls,javafx.graphics,javafx.fxml,javafx.media -jar MyFXApp.jar

Result: Everything is fine.

Perhaps also interesting:

• JDK-8237603
• [Regression] JavaFX unbounded VRAM+RAM usage

System Info: OS: Ubuntu 18.04.4 LTS JDK Version: openjdk version "11.0.7" 2020-04-14 JavaFX: 14.0.1 Glxinfo:

Vendor: X.Org (0x1002)
Device: Radeon RX 580 Series (POLARIS10, DRM 3.33.0, 5.3.0-46-generic, LLVM 9.0.0) (0x67df)
Version: 19.2.8
Accelerated: yes
Video memory: 8192MB
Unified memory: no
Preferred profile: core (0x1)
Max core profile version: 4.5
Max compat profile version: 4.5
Max GLES1 profile version: 1.1
Max GLES[23] profile version: 3.2