RFR: 8360160: ubuntu-22-04 machine is failing client tests [v2]

[Alexey Ivanov]

On Mon, 25 Aug 2025 16:56:55 GMT, Damon Nguyen <dnguyen at openjdk.org> wrote:

>> Ubuntu machine has multiple failing java awt tests. When looking at the screenshots of the desktop when each test fails, a white square can be seen at the top-left of the desktop.
>> 
>> <img width="803" height="344" alt="Screenshot 2025-08-20 at 10 06 37 AM" src="https://github.com/user-attachments/assets/52d023f6-18ff-46d4-98c4-e2e332ab6a03" />
>> 
>> This seems to be similar to the white square that `FrameVisualTest.java` creates so the frame was not disposed of properly during this failure. I have tried re-creating this failure on Ubuntu 22.04, similar to the failure OS that this originally occurred on, to no avail. I ran this test individually, and with all of the listed failing tests back-to-back but all the tests pass as normal. This stabilization fix to the test attempts to prevent this in case it occurs again.
>
> Damon Nguyen has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Replace setAutoDelay

test/jdk/java/awt/Frame/FrameVisualTest.java line 59:

> 57:         gcs = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().getConfigurations();
> 58:         robot = new Robot();
> 59:         robot.waitForIdle();

There's nothing to wait for yet.

test/jdk/java/awt/Frame/FrameVisualTest.java line 90:

> 88:                     if (frames[index] != null) {
> 89:                         frames[index].setVisible(false);
> 90:                         frames[index].dispose();

Calling `setVisible(false)` before `dispose` is redundant.

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PR Review Comment: https://git.openjdk.org/jdk/pull/26871#discussion_r2299038191
PR Review Comment: https://git.openjdk.org/jdk/pull/26871#discussion_r2299040604