<AWT Dev> [9] Review request for 8159432: [PIT][macosx] StackOverflow in closed/java/awt/Dialog/DialogDeadlock/DialogDeadlockTest

Semyon Sadetsky semyon.sadetsky at oracle.com
Wed Oct 5 08:45:18 UTC 2016

On 05.10.2016 03:04, Sergey Bylokhov wrote:
> On 24.08.16 22:18, Semyon Sadetsky wrote:
>> The issue is connected to the restoring focus to the previously focused
>> window when there are a lot of focus restore requests are coming very
>> often (for example series of windows showing and hiding quickly). In
>> this case waiting for asynchronous focus causes nested waiting loop, and
>> if number of such requests is big enough the StackOverflowError is 
>> thrown.
>> To avoid this the 8139218 solution is revisited to manage the focus
>> restore synchronously only if it is possible and send a single
>> asynchronous focus request otherwise.
> Can you please clarify what is the difference between:
> tempLost.requestFocusInWindow() which was updated in the fix, and 
> toFocus.requestFocusInWindow() which was not updated. As far as I 
> understand the second case(when the toFocus==restoreFocusTo) is a 
> component to which we should send ROLLBACK.
If you look on the comment above the toFocus.requestFocusInWindow() line 
you get the case when it is called.
Actually tempLost.requestFocusInWindow() is the right place to set 
ROLLBACK. Focus is requested with ROLLBACK cause only when
tempLost==toFocus, but it is hard prove, so I'll better to add the 


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