Memory Leaks (original) (raw)

Scott Palmer swpalmer at gmail.com
Sat Oct 20 15:01:39 PDT 2012

Thanks for the response. 8.0 is too far away. I need to ship my app in a few weeks. 2.2.3 may be old to you guys, but I just found 2.2.3 yesterday. We were on 7u7 and then I discovered that there was a new JavaFX runtime in 7u9.. Would have been nice to know! 7u7 shipped not too long ago with 2.2.0 and I didn't see any sort of announcements that there was anything newer.

I will try to isolate the leak. We think we are seeing com.sun.javafx.css.StyleHelper$CacheEntry and com.sun.javafx.css.StyleHelper$CalculatedValue leaking (at least).

jvisualvm shows the number of those objects are always growing. Comparing heap dumps we have never observed the number to decrease.

I'm currently only able to connect to the machine running my test via Remote Desktop, and the screen saver probably keep kicking in, I think that is affecting the test. Is JavaFX smart enough to not render when the screen is blanked?

I will try to produce a test case. But if anyone has knowledge about this that wants to share, any info is appreciated.

Thanks,, Scott

On Sat, Oct 20, 2012 at 5:16 PM, Jonathan Giles <jonathan.giles at oracle.com>wrote:

David Grieve is the go-to expert on all things CSS, but from a higher-level perspective the general answer is always: you tell us! :-) There might be a leak we don't know about, or can't easily reproduce, and you might have just the information we need to finally get rid of that annoying leak you mention.

So, please, file Jira bugs on us and we'll get to looking at them as soon as possible. If you can provide a reproducible test case that would be hugely appreciated too. Finally, from our point of view JavaFX 2.2.3 is rather old code - we've been actively developing in the 8.0 branch for quite a long time now, and one of our primary focuses during this time has been performance (CPU and memory). In other words, there is a chance it may already be resolved (or minimised) in the 8.0 branch. I know it is a lot to ask, but there are 8.0 builds available that you can test with. If you have the time and inclination, it might be worth testing against these builds to see if it is resolved. Thanks, -- Jonathan

On 21/10/2012 2:10 a.m., Scott Palmer wrote: Are there known leaks in 2.2.3 with regards to CSS and style cache stuff? In my application I add and remove style classes to highlight objects in the scene graph that are in various states (selected, active, disabled, etc). It seems that every time the style class list is changed that there is a small leak. Since while the app runs and process data (a process that may run indefinitely) the state of objects in the graph changes as data is processed, this is a significant issue. Our customers may have the app fail after several hours or a few days because of these leaks.

Scott

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