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List:       openjdk-2d-dev
Subject:    Re: RFR: 8271519: java/awt/event/SequencedEvent/MultipleContextsFunctionalTest.java failed with
From:       Sergey Bylokhov <serb () openjdk ! org>
Date:       2022-11-29 23:55:26
Message-ID: CCBeE-F51rgBTFaCnI5T_Yu-e9fPfm02jI0me7VrFm0=.557bfe78-7eb1-420f-b0eb-85c33bab1b77 () github ! com
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On Tue, 29 Nov 2022 21:36:31 GMT, Alexander Zvegintsev <azvegint@openjdk.org> wrote:

> This test was trying to add windows to `ArrayList` instance from two different \
> threads without any synchronization.  
> So the reported test failure happens when the `WINDOWS` list contains only one \
> windows instead of expected two. 
> Another possible failure is:
> 
> Exception in thread "AWT-EventQueue-1" java.lang.ArrayIndexOutOfBoundsException: \
> Index 1 out of bounds for length 0 at \
> java.base/java.util.ArrayList.add(ArrayList.java:455) at \
> java.base/java.util.ArrayList.add(ArrayList.java:467) at \
> MultipleContextsFunctionalTest$1$1.run(MultipleContextsFunctionalTest.java:107) at \
> java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:318) 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)
> Total [200] - Expected [400]
> Test FAILED
> 
> 
> The test fails in about 8 out of 100 runs in a cycle for me.
> 
> Changing `ArrayList` to `CopyOnWriteArrayList` solves the issue. Didn't fail once \
> after modification and 300 runs.

Marked as reviewed by serb (Reviewer).

-------------

PR: https://git.openjdk.org/jdk/pull/11423


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