Too many touch points reported: Bug?

Dear community of JavaFX

Following situation. I have a contact manager that recognizes special movements and fire of javafx. GestureEvent derivatives on positive detection. gesture event has a list of points of contact cloned to lay their hands on the beginning and the end of the gesture.

Now if a listener for this GestureEvents fails for some reason any with an untrapped exception, JavaFX contact point manipulation goes wrong by launching constantly RuntimeExceptions: "too many touch points reported. Therefore, the touch application is no longer usable and must be restarted.

If the listener completes without error, the application continues to run as expected.

The GestureEvent in a Platform.runLater of fire seemed to help, but I have experienced the problem at least once. The problem is not reproducible reliable however.

I think it's a bug in JavaFX.

Any thoughts/advice/comments on this?

See the below stacktraces. The first trace of NPE is my deliberately caused exception. The trace of the second arises on each event unique later touch

Exception in thread "Thread of Application JavaFX" java.lang.NullPointerException

at view.services.ui.navigation.internal.NavigationService.home(NavigationService.java:319)

at view.ui.gestures.addons.grab.internal.DefaultGrabEventHandler.handle(DefaultGrabEventHandler.java:298)

at view.ui.gestures.addons.grab.internal.DefaultGrabEventHandler.handle(DefaultGrabEventHandler.java:1)

to com.sun.javafx.event.CompositeEventHandler$ NormalEventHandlerRecord.handleBubblingEvent (CompositeEventHandler.java:218)

at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80)

at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)

at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)

at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)

at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)

at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)

at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)

at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)

at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)

at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)

at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)

at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:49)

at javafx.event.Event.fireEvent(Event.java:203)

at keba.view.javafx.gestures.grab.GrabDetector.fireEvent(GrabDetector.java:579)

at keba.view.javafx.gestures.grab.GrabDetector.fireGrabMoveOrEnd(GrabDetector.java:452)

at keba.view.javafx.gestures.grab.GrabDetector.handleTouchReleased(GrabDetector.java:415)

at keba.view.javafx.gestures.grab.GrabDetector.handle(GrabDetector.java:336)

at keba.view.javafx.gestures.grab.GrabDetector.handle(GrabDetector.java:1)

to com.sun.javafx.event.CompositeEventHandler$ NormalEventFilterRecord.handleCapturingEvent (CompositeEventHandler.java:282)

at com.sun.javafx.event.CompositeEventHandler.dispatchCapturingEvent(CompositeEventHandler.java:98)

at com.sun.javafx.event.EventHandlerManager.dispatchCapturingEvent(EventHandlerManager.java:223)

at com.sun.javafx.event.EventHandlerManager.dispatchCapturingEvent(EventHandlerManager.java:180)

at com.sun.javafx.event.CompositeEventDispatcher.dispatchCapturingEvent(CompositeEventDispatcher.java:43)

at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:52)

at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)

at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)

at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)

at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)

at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)

at javafx.event.Event.fireEvent(Event.java:203)

at javafx.scene.Scene.processTouchEvent(Scene.java:1773)

to javafx.scene.Scene.access$ 5800 (Scene.java:193)

to javafx.scene.Scene$ ScenePeerListener.touchEventEnd (Scene.java:2712)

to com.sun.javafx.tk.quantum.GlassViewEventHandler$ 11.run(GlassViewEventHandler.java:989)

to com.sun.javafx.tk.quantum.GlassViewEventHandler$ 11.run(GlassViewEventHandler.java:985)

at java.security.AccessController.doPrivileged (Native Method)

at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleEndTouchEvent(GlassViewEventHandler.java:985)

at com.sun.glass.ui.View.handleEndTouchEvent(View.java:553)

at com.sun.glass.ui.View.notifyEndTouchEvent(View.java:1007)

at com.sun.glass.ui.TouchInputSupport.notifyEndTouchEvent(TouchInputSupport.java:85)

at com.sun.glass.ui.win.WinGestureSupport.notifyEndTouchEvent(WinGestureSupport.java:62)

at com.sun.glass.ui.win.WinApplication._runLoop (Native Method)

to com.sun.glass.ui.win.WinApplication.access$ 300 (WinApplication.java:39)

to com.sun.glass.ui.win.WinApplication$ $4 1.run(WinApplication.java:112)

at java.lang.Thread.run(Thread.java:744)

Exception in thread "Thread of Application JavaFX" java.lang.RuntimeException: too many touch points reported

to javafx.scene.Scene$ ScenePeerListener.touchEventNext (Scene.java:2668)

to com.sun.javafx.tk.quantum.GlassViewEventHandler$ 10.run(GlassViewEventHandler.java:965)

to com.sun.javafx.tk.quantum.GlassViewEventHandler$ 10.run(GlassViewEventHandler.java:944)

at java.security.AccessController.doPrivileged (Native Method)

at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleNextTouchEvent(GlassViewEventHandler.java:944)

at com.sun.glass.ui.View.handleNextTouchEvent(View.java:547)

at com.sun.glass.ui.View.notifyNextTouchEvent(View.java:1002)

at com.sun.glass.ui.TouchInputSupport.notifyNextTouchEvent(TouchInputSupport.java:117)

at com.sun.glass.ui.win.WinGestureSupport.notifyNextTouchEvent(WinGestureSupport.java:58)

at com.sun.glass.ui.win.WinApplication._runLoop (Native Method)

to com.sun.glass.ui.win.WinApplication.access$ 300 (WinApplication.java:39)

to com.sun.glass.ui.win.WinApplication$ $4 1.run(WinApplication.java:112)

at java.lang.Thread.run(Thread.java:744)

Exception in thread "Thread of Application JavaFX" java.lang.NullPointerException

at javafx.scene.Scene.processTouchEvent(Scene.java:1766)

to javafx.scene.Scene.access$ 5800 (Scene.java:193)

to javafx.scene.Scene$ ScenePeerListener.touchEventEnd (Scene.java:2712)

to com.sun.javafx.tk.quantum.GlassViewEventHandler$ 11.run(GlassViewEventHandler.java:989)

to com.sun.javafx.tk.quantum.GlassViewEventHandler$ 11.run(GlassViewEventHandler.java:985)

at java.security.AccessController.doPrivileged (Native Method)

at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleEndTouchEvent(GlassViewEventHandler.java:985)

at com.sun.glass.ui.View.handleEndTouchEvent(View.java:553)

at com.sun.glass.ui.View.notifyEndTouchEvent(View.java:1007)

at com.sun.glass.ui.TouchInputSupport.notifyEndTouchEvent(TouchInputSupport.java:85)

at com.sun.glass.ui.win.WinGestureSupport.notifyEndTouchEvent(WinGestureSupport.java:62)

at com.sun.glass.ui.win.WinApplication._runLoop (Native Method)

to com.sun.glass.ui.win.WinApplication.access$ 300 (WinApplication.java:39)

to com.sun.glass.ui.win.WinApplication$ $4 1.run(WinApplication.java:112)

at java.lang.Thread.run(Thread.java:744)

Yes, it is a bug in FX. I filed it RT-34602. As a solution, it would be probably better catch the exception.

Tags: Java

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    into   full_name
    from   ONESTOP_QUEUE a
    where  a.WORKSTATION_ID_CALLED = in_workstation_id
    and    a.STATUS = 'CALLED'
    and    a.QUEUE_ID = (
       select min( c.QUEUE_ID )
       from   ONESTOP_QUEUE c
       where  c.WORKSTATION_ID_CALLED = in_workstation_id
     and    c.STATUS = 'CALLED');
    However, when all these display panels is turned on (and I use the code as follows in the other pages for similar purposes) the application become slow and eventually unresponsive. As a first step, we have the application running a box with Oracle XE. Finally, we have migrated to a full blown installation 11g with APEX listener and GlassFish. My DBA said everything looks ok on the side of the DB, so I tried to dig into other areas to see where the bottleneck can be. After inspecting the report of Active Sessions in the APEX, I noticed that there are a ton of connections being generated (> 30 000). This is not a good thing for me and I try to understand what I am doing wrong.

    At first I used $. post() instead of $. get (). I was also using setInterval() instead of a setTimeout() loop. However, none of these changes really seem to help the situation. I am at a loss to know how else to improve the performance of this application. Any suggestions on what I can try?

    Most of the features of the app is on apex.oracle.com
    WORKSPACE: SCCC_TEST
    USER/PASS: TEST/test
    Direct URL to the page (I spend worksation ID): http://apex.oracle.com/pls/apex/f?p=65890:7:0:P7_WORKSTATION_IN:ADMISSIONS_1

    Thanks in advance for any help.

    Hello

    are you sure that each AJAX request generates a new APEX session? Because it is based on your downloaded app all right. You can check that by running the following query. It will also show you how long it took APEX to meet your demand for AJAX (elapsed_time). I think that the elapsed time will be the key to find out why your application becomes unresponsive if too many customers are returning. The goal should be that the AJAX request ends as soon as possible. For example 1 sec would be for many, because if you have 20 parallel AJAX requests at the same time, this could have an impact on your DB. You can share your average time?

    select apex_session_id, to_char(view_date, 'DD.MM.YYYY HH24:MI:SS') as view_date, elapsed_time, application_info
      from apex_workspace_activity_log
     where application_id = 65890
       and page_id = 7
       and view_date >= sysdate - 0.1
     order by 1, 2, 3
    

    I don't know how much data is stored in the ONESTOP_QUEUE table, but it may be useful to adjust your statement used in F_NEXT_STUDENT. On apex.oracle.com, the plan of the explain output shows at least he uses twice a scan interval on index ONESTOP_QUEUE_IDX. For inside MIN instruction it is well, but the external SQL should just do a search PK using QUEUE_ID. This is why I would like to delete

    a.WORKSTATION_ID_CALLED = in_workstation_id and a.STATUS = 'CALLED'
    

    to force the index seek PK using QUEUE_iD.

    I also suggest that you make your JavaScript code on the page 5 and 7 more transparent. He is currently hiding in the region or footer HTML. I would say to move JS code in the attributes of the page 'Function and Global Variable declaration' and ' run when Page Loads. BTW, there is no need to use $(document) .ready in "Run when the Page loads", because internally, we already use $(document) .ready.

    Or instead of using your own JavaScript code you can download the plugin http://www.oracle.com/technetwork/developer-tools/apex/application-express/apex-plug-ins-182042.html#dynamic "Timer" and use rather dynamic actions. On page 5 you can use the action "Refresh" to update your classic report and on page 7 you can use an action to "Set the value" to run your query. I think it would make your page easy to read for others.

    Concerning
    Patrick
    -----------
    My Blog: http://www.inside-oracle-apex.com
    APEX Plug-Ins: http://apex.oracle.com/plugins
    Twitter: http://www.twitter.com/patrickwolf

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