Bug? Memory leak?

[Bruce Axtens]

My BOJ project is on screen at the moment doing nothing but waiting for me to hit "Save" or "Cancel". However, I have Java VisualVM open and it's watching BOJ slowly consume more and more heap. This seems a bit anomalous as there's nothing happening in my code; whatever's chewing RAM is doing it in the background/daemon code. In the time it's taken to get this email written the Heap Size has climbed to 200MB. This would explain why BOJ eventually locks-up if I don't respond to it immediately.

Screen shot and project archive attached.

Kind regards,
Bruce.

 

[Erel]

Are you testing it in Release mode? Can you upload the two additional libraries it uses?

 

[Bruce Axtens]

Yes, it is a release mode .jar that is running. Additional libraries in others.zip.

 

[Erel]

I don't see any potential memory leak here.

I've even limited the heap size to 16mb with this command line:
java -Xmx16m -jar BOJ.jar

The question is whether you get an out of memory error or not. Run it from the command line to test it.

 

[Bruce Axtens]

Thanks, Erel.

I've been using JavaW.exe to interpret the .jar file. Is that wrong? Should I be using something else? The graphic shows how it's defined in Task Scheduler.

If I use java.exe won't that popup a cmd window while the program runs?

 

[Erel]

You should use javaw. However in order to see error messages you can run it with java.exe instead. The only difference is whether a console is created or not.

 

[Bruce Axtens]

It might be cheating, but I achieved this by pasting in a large blob of text.

Exception in thread "JavaFX Application Thread" java.lang.OutOfMemoryError: Java heap space
        at com.sun.glass.ui.win.WinSystemClipboard.popBytes(Native Method)
        at com.sun.glass.ui.win.WinSystemClipboard.popFromSystem(Unknown Source)
        at com.sun.glass.ui.SystemClipboard.getData(Unknown Source)
        at com.sun.glass.ui.ClipboardAssistance.getData(Unknown Source)
        at com.sun.javafx.tk.quantum.QuantumClipboard.getContent(Unknown Source)
        at javafx.scene.input.Clipboard.getContentImpl(Unknown Source)
        at javafx.scene.input.Clipboard.getContent(Unknown Source)
        at javafx.scene.input.Clipboard.getString(Unknown Source)
        at com.sun.javafx.webkit.PasteboardImpl.getPlainText(Unknown Source)
        at com.sun.webkit.WCPasteboard.getPlainText(Unknown Source)
        at com.sun.webkit.WebPage.twkProcessKeyEvent(Native Method)
        at com.sun.webkit.WebPage.dispatchKeyEvent(Unknown Source)
        at javafx.scene.web.WebView.processKeyEvent(Unknown Source)
        at javafx.scene.web.WebView.lambda$registerEventHandlers$31(Unknown Source)
        at javafx.scene.web.WebView$$Lambda$93/12265642.handle(Unknown Source)
        at com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(Unknown Source)
        at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(Unknown Source)
        at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source)
        at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source)
        at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(Unknown Source)
        at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
        at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
        at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
        at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
        at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
        at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
        at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
        at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
        at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
        at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
        at com.sun.javafx.event.EventUtil.fireEventImpl(Unknown Source)
        at com.sun.javafx.event.EventUtil.fireEvent(Unknown Source)

 

[Bruce Axtens]

I then deleted all the text, and pasted in the above error message until the following appeared

#
# A fatal error has been detected by the Java Runtime Environment:
#
#  EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x6d39d16e, pid=16104, tid=8004
#
# JRE version: Java(TM) SE Runtime Environment (8.0_31-b13) (build 1.8.0_31-b13)
# Java VM: Java HotSpot(TM) Client VM (25.31-b07 mixed mode, sharing windows-x86 )
# Problematic frame:
# C  [jfxwebkit.dll+0x40d16e]
#
# Failed to write core dump. Minidumps are not enabled by default on client versions of Windows
#
# An error report file with more information is saved as:
# C:\Users\Bugmagnet\.joblog\hs_err_pid16104.log
#
# If you would like to submit a bug report, please visit:
#   http://bugreport.java.com/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#

 

[Erel]

This doesn't mean that there is a memory leak.

It means that there wasn't enough memory for the HtmlEditor(?) to handle the text.

 

[Bruce Axtens]

Oops. Ok, will have to find a server to put the code on and let it run "forever" there. Sorry.

 

[Erel]

Please start a new thread for this question.