Help with "Nothing left on the event queue" error.

General Discussion Other

ilya_fl

Help with "Nothing left on the event queue" error.

in General Discussion • Other • 6 months ago

I am getting this error intermittently, not really coinciding with any action (to my knowledge). Just sort of pops up.

Here is the full version.

Exception in thread "AWT-EventQueue-0" java.lang.RuntimeException: Nothing left on the event queue.
at processing.core.PApplet$InternalEventQueue.remove(PApplet.java:2529)
at processing.core.PApplet.dequeueEvents(PApplet.java:2599)
at processing.core.PApplet.postEvent(PApplet.java:2579)
at processing.core.PApplet.nativeMouseEvent(PApplet.java:2847)
at processing.core.PApplet.mouseMoved(PApplet.java:2911)
at java.awt.Component.processMouseMotionEvent(Component.java:6342)
at java.awt.Component.processEvent(Component.java:6066)
at java.awt.Container.processEvent(Container.java:2039)
at java.awt.Component.dispatchEventImpl(Component.java:4660)
at java.awt.Container.dispatchEventImpl(Container.java:2097)
at java.awt.Component.dispatchEvent(Component.java:4488)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:668)
at java.awt.EventQueue.access$400(EventQueue.java:81)
at java.awt.EventQueue$2.run(EventQueue.java:627)
at java.awt.EventQueue$2.run(EventQueue.java:625)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)
at java.awt.EventQueue$3.run(EventQueue.java:641)
at java.awt.EventQueue$3.run(EventQueue.java:639)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:638)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

Tried searching for it but nothing seems to come up.

It seems to be coming from the PApplet.java

http://processing.googlecode.com/svn/trunk/processing/android/core/src/processing/core/PApplet.java

Here is the snippet, not really what InternalEventQueue is

class InternalEventQueue {
protected Event queue[] = new Event[10];
protected int offset;
protected int count;
synchronized void add(Event e) {
if (count == queue.length) {
queue = (Event[]) expand(queue);
}
queue[count++] = e;
}
synchronized Event remove() {
if (offset == count) {
throw new RuntimeException("Nothing left on the event queue.");
}
Event outgoing = queue[offset++];
if (offset == count) {
// All done, time to reset
offset = 0;
count = 0;
}
return outgoing;
}
synchronized boolean available() {
return count != 0;
}
}

Replies(3)

PhiLho

Re: Help with "Nothing left on the event queue" error.

6 months ago

Do you use noLoop()?

ilya_fl

Re: Help with "Nothing left on the event queue" error.

6 months ago

yeah,

I use noLoop() and loop() to pause when I add and remove entries from an array. could that be the problem?

PhiLho

Re: Help with "Nothing left on the event queue" error.

6 months ago

Perhaps. I see that when not looping, the events (mouse / key / etc.) are not dequeued. I nearly never use loop() / noLoop() for normal control flow, you probably need to find an alternative to this logic.