JavaFX 13 Webview hangs

Kevin Rushforth kevin.rushforth at
Mon Feb 10 15:00:40 UTC 2020

And one last thing to try: can you run it with the JavaFX 15-ea+1 build 
and see if that makes a difference?

-- Kevin

On 2/10/2020 6:59 AM, Kevin Rushforth wrote:
> Seems I missed your comment about it being hung to the point you can't 
> run jstack.
> If you are using JDK 12 or later, you might try with JDK 11 and see if 
> that makes a difference. It will help narrow it down to a change in 
> the JDK versus a change in JavaFX (although I suspect it's a change in 
> JavaFX).
> -- Kevin
> On 2/10/2020 6:40 AM, Kevin Rushforth wrote:
>> A thread stack dump using "jstack" might be helpful.
>> Also, what version of the JDK are you running?
>> -- Kevin
>> On 2/9/2020 4:07 AM, Lior Yaffe wrote:
>>> My application is a Java application running a Javascript/Html website
>>> inside a JavaFX WebView. It was working stable for several years with
>>> various versions of Java and JavaFX.
>>> As far as I can tell it is following best coding practices such as 
>>> running
>>> all UI code in the JavaFX thread and as such.
>>> Since upgrading to JavaFX 13 my application hangs sporadically. When it
>>> happens the website running inside the webview becomes unresponsive and
>>> displays an hourglass icon.
>>> When the app hangs I cannot take a thread dump using jstack or close 
>>> the
>>> application. I have to kill it.
>>> The problem is reproduced on multiple Windows workstations. It was 
>>> never
>>> reported or reproduced on Linux or Mac so there is a chance it is 
>>> Windows
>>> specific.
>>> When the app hangs the CPU is ideal so this is not a busy loop.
>>> Which diagnostic information can I obtain to better understand this 
>>> problem?

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