Warnings when running a GUI testcase

[RSHKwee]

When I run a Swing test, I get during the test run the following messages:
...
jul. 18,2023 08:12 WARNING Exception thrown by a TimerTask org.assertj.swing.monitor.ProtectingTimerTask ; handleException
jul. 18,2023 08:12 WARNING Exception thrown by a TimerTask org.assertj.swing.monitor.ProtectingTimerTask ; handleException
jul. 18,2023 08:12 WARNING Exception thrown by a TimerTask org.assertj.swing.monitor.ProtectingTimerTask ; handleException
jul. 18,2023 08:12 WARNING Exception thrown by a TimerTask org.assertj.swing.monitor.ProtectingTimerTask ; handleException
jul. 18,2023 08:12 WARNING Exception thrown by a TimerTask org.assertj.swing.monitor.ProtectingTimerTask ; handleException
jul. 18,2023 08:12 WARNING Exception thrown by a TimerTask org.assertj.swing.monitor.ProtectingTimerTask ; handleException
jul. 18,2023 08:12 WARNING Exception thrown by a TimerTask org.assertj.swing.monitor.ProtectingTimerTask ; handleException
jul. 18,2023 08:12 WARNING Exception thrown by a TimerTask org.assertj.swing.monitor.ProtectingTimerTask ; handleException
jul. 18,2023 08:12 WARNING Exception thrown by a TimerTask org.assertj.swing.monitor.ProtectingTimerTask ; handleException
...

Which timer can I increase to limit the messages?
And how do I do it?

[arduhe]

Have the same problem, but I don't think that this is a matter of increasing timer limits. Problem occured after switching from JDK 11 to JDK 17 and has a stacktrace which shows an access to a module inside java.util

Aug. 20, 2023 9:49:38 AM org.assertj.swing.monitor.ProtectingTimerTask handleException
WARNUNG: Exception thrown by a TimerTask
java.lang.reflect.InaccessibleObjectException: Unable to make field int java.util.TimerTask.state accessible: module java.base does not "opens java.util" to unnamed module @6c38726a
        at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:354)
        at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:297)
        at java.base/java.lang.reflect.Field.checkCanSetAccessible(Field.java:178)
        at java.base/java.lang.reflect.Field.setAccessible(Field.java:172)
        at org.assertj.swing.dependency.fest_reflect.util.Accessibles$SetAccessibleAction.run(Accessibles.java:70)
        at org.assertj.swing.dependency.fest_reflect.util.Accessibles$SetAccessibleAction.run(Accessibles.java:60)
        at java.base/java.security.AccessController.doPrivileged(AccessController.java:318)
        at org.assertj.swing.dependency.fest_reflect.util.Accessibles.setAccessible(Accessibles.java:57)
        at org.assertj.swing.dependency.fest_reflect.util.Accessibles.makeAccessible(Accessibles.java:46)
        at org.assertj.swing.dependency.fest_reflect.field.Invoker.verifyCorrectType(Invoker.java:98)
        at org.assertj.swing.dependency.fest_reflect.field.Invoker.createInvoker(Invoker.java:74)
        at org.assertj.swing.dependency.fest_reflect.field.Invoker.newInvoker(Invoker.java:68)
        at org.assertj.swing.dependency.fest_reflect.field.FieldType.in(FieldType.java:74)
        at org.assertj.swing.monitor.ProtectingTimerTask.isCanceled(ProtectingTimerTask.java:54)
        at org.assertj.swing.monitor.ProtectingTimerTask.run(ProtectingTimerTask.java:41)
        at java.base/java.util.TimerThread.mainLoop(Timer.java:566)
        at java.base/java.util.TimerThread.run(Timer.java:516)

[Gambit2505]

Sorry to bring this back up, but for anyone else still having this problem, I was able to semi-permanently fix it by adding the following argument to the VM (jre 21):

--add-opens java.base/java.util=ALL-UNNAMED