The test javax/swing/JTableHeader/6884066/bug6884066.java intermittently fails on Ubuntu 20.04 22.04 with the following diagnostic:

====================8<--------------------
#section:main
----------messages:(7/261)----------
command: main bug6884066
reason: User specified action: run main bug6884066
started: Sun Apr 09 01:16:38 CEST 2023
Mode: othervm
Additional options from @modules: --add-modules java.desktop
finished: Sun Apr 09 01:16:46 CEST 2023
elapsed time (seconds): 8.018
----------configuration:(3/40)----------
Boot Layer
  add modules: java.desktop

----------System.out:(0/0)----------
----------System.err:(30/2108)----------
java.lang.reflect.InvocationTargetException
at java.desktop/java.awt.EventQueue.invokeAndWait(EventQueue.java:1371)
at java.desktop/java.awt.EventQueue.invokeAndWait(EventQueue.java:1346)
at java.desktop/javax.swing.SwingUtilities.invokeAndWait(SwingUtilities.java:1480)
at bug6884066.main(bug6884066.java:70)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:578)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:125)
at java.base/java.lang.Thread.run(Thread.java:1630)
Caused by: java.lang.RuntimeException: Unexpected header's value; index = 4 value = E
at bug6884066.checkColumn(bug6884066.java:82)
at bug6884066$2.run(bug6884066.java:73)
at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:308)
at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:773)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:720)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:714)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:400)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:87)
at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:742)
at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)

JavaTest Message: Test threw exception: java.lang.reflect.InvocationTargetException
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.reflect.InvocationTargetException
====================8<--------------------

The issue was observed with 21-ea+17-1421, 20+36-2344, 17.0.2+8-86

Reproducibility: ~30%

Steps to reproduce:

$ runme.sh jtreg [test_jdk] "" test/jdk/javax/swing/JTableHeader/6884066/bug6884066.java

see the attached runme.sh