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Groups > comp.lang.java.programmer > #32023

Re: javax.swing.Timer blocking program termination

From Jeff Higgins <jeff@invalid.invalid>
Newsgroups comp.lang.java.programmer
Subject Re: javax.swing.Timer blocking program termination
Date 2015-07-14 16:09 -0400
Organization A noiseless patient Spider
Message-ID <mo3qej$mpf$1@dont-email.me> (permalink)
References (5 earlier) <e1087f9c-0028-44a3-99bf-5c4356626e9d@googlegroups.com> <mo35mi$366$1@dont-email.me> <c284d5a9-951b-424d-88ed-e738dc94edab@googlegroups.com> <mo3810$c12$1@dont-email.me> <mo3kpq$oua$1@dont-email.me>

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On 07/14/2015 02:35 PM, Martin Gregorie wrote:
> On Tue, 14 Jul 2015 10:55:20 -0400, Jeff Higgins wrote:
>
>> Makes perfect sense to me.
>> But I'm still not sure how a <1 sec timer keeps the EDT alive while a >1
>> sec timer doesn't - barring explicit stops in windowClosing.
>>
>
> It occurs to me that, the way Knute's original example works, that he
> might have inadvertently set up a race condition because all the heavy
> lifting involved in setting up the JFrame, i.e. loading a shedload of
> classes and constructing instances from them all happens on the EDT and
> that this might well take a second or so to complete and still be running
> when the timer gets started. IOW, could the timer have fired its event
> before the default close operation had been defined and would the timer
> event have been ignored if it fired its event before the JFrame had been
> completed and displayed?
>
> Of course, this may be a stupid idea, but it does fit the test results
> which show a short timeout being ignored while a longer one does what
> you'd expect.
>
>
Here's a thread dump. don't know what it means.

Full thread dump Java HotSpot(TM) 64-Bit Server VM (25.40-b25 mixed mode):

"TimerQueue" #14 daemon prio=5 os_prio=0 tid=0x0000000001b55000 
nid=0x1159 runnable [0x00007fd462759000]
    java.lang.Thread.State: RUNNABLE
	at java.lang.Thread.currentThread(Native Method)
	at java.lang.Thread.interrupted(Thread.java:944)
	at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.checkInterruptWhileWaiting(AbstractQueuedSynchronizer.java:2002)
	at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2079)
	at java.util.concurrent.DelayQueue.take(DelayQueue.java:223)
	at javax.swing.TimerQueue.run(TimerQueue.java:171)
	at java.lang.Thread.run(Thread.java:745)

"DestroyJavaVM" #13 prio=5 os_prio=0 tid=0x00007fd4641e2000 nid=0x114a 
waiting on condition [0x0000000000000000]
    java.lang.Thread.State: RUNNABLE

"AWT-EventQueue-0" #11 prio=6 os_prio=0 tid=0x00007fd464214800 
nid=0x1158 waiting on condition [0x00007fd46285a000]
    java.lang.Thread.State: WAITING (parking)
	at sun.misc.Unsafe.park(Native Method)
	- parking to wait for  <0x00000000f5b76630> (a 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
	at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
	at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
	at java.awt.EventQueue.getNextEvent(EventQueue.java:547)
	at 
java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:170)
	at 
java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
	at 
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

"AWT-Shutdown" #12 prio=5 os_prio=0 tid=0x00007fd464212800 nid=0x1157 in 
Object.wait() [0x00007fd46295b000]
    java.lang.Thread.State: TIMED_WAITING (on object monitor)
	at java.lang.Object.wait(Native Method)
	- waiting on <0x00000000f5b76fe8> (a java.lang.Object)
	at sun.awt.AWTAutoShutdown.run(AWTAutoShutdown.java:314)
	- locked <0x00000000f5b76fe8> (a java.lang.Object)
	at java.lang.Thread.run(Thread.java:745)

"AWT-XAWT" #10 daemon prio=6 os_prio=0 tid=0x00007fd464210800 nid=0x1156 
runnable [0x00007fd462a5c000]
    java.lang.Thread.State: RUNNABLE
	at sun.awt.X11.XToolkit.waitForEvents(Native Method)
	at sun.awt.X11.XToolkit.run(XToolkit.java:568)
	at sun.awt.X11.XToolkit.run(XToolkit.java:532)
	at java.lang.Thread.run(Thread.java:745)

"Java2D Disposer" #8 daemon prio=10 os_prio=0 tid=0x00007fd4641eb000 
nid=0x1155 in Object.wait() [0x00007fd468111000]
    java.lang.Thread.State: WAITING (on object monitor)
	at java.lang.Object.wait(Native Method)
	- waiting on <0x00000000f5b5b918> (a java.lang.ref.ReferenceQueue$Lock)
	at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
	- locked <0x00000000f5b5b918> (a java.lang.ref.ReferenceQueue$Lock)
	at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)
	at sun.java2d.Disposer.run(Disposer.java:148)
	at java.lang.Thread.run(Thread.java:745)

"Service Thread" #7 daemon prio=9 os_prio=0 tid=0x00007fd46400c000 
nid=0x1153 runnable [0x0000000000000000]
    java.lang.Thread.State: RUNNABLE

"C1 CompilerThread1" #6 daemon prio=9 os_prio=0 tid=0x0000000001934800 
nid=0x1152 runnable [0x0000000000000000]
    java.lang.Thread.State: RUNNABLE

"C2 CompilerThread0" #5 daemon prio=9 os_prio=0 tid=0x0000000001931800 
nid=0x1151 waiting on condition [0x0000000000000000]
    java.lang.Thread.State: RUNNABLE

"Signal Dispatcher" #4 daemon prio=9 os_prio=0 tid=0x0000000001930000 
nid=0x1150 waiting on condition [0x0000000000000000]
    java.lang.Thread.State: RUNNABLE

"Finalizer" #3 daemon prio=8 os_prio=0 tid=0x00000000018f7800 nid=0x114f 
in Object.wait() [0x00007fd468db9000]
    java.lang.Thread.State: WAITING (on object monitor)
	at java.lang.Object.wait(Native Method)
	- waiting on <0x00000000f5906f58> (a java.lang.ref.ReferenceQueue$Lock)
	at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
	- locked <0x00000000f5906f58> (a java.lang.ref.ReferenceQueue$Lock)
	at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)
	at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:209)

"Reference Handler" #2 daemon prio=10 os_prio=0 tid=0x00000000018f0000 
nid=0x114e in Object.wait() [0x00007fd468eba000]
    java.lang.Thread.State: WAITING (on object monitor)
	at java.lang.Object.wait(Native Method)
	- waiting on <0x00000000f5906998> (a java.lang.ref.Reference$Lock)
	at java.lang.Object.wait(Object.java:502)
	at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:157)
	- locked <0x00000000f5906998> (a java.lang.ref.Reference$Lock)

"VM Thread" os_prio=0 tid=0x00000000018ea800 nid=0x114d runnable

"GC task thread#0 (ParallelGC)" os_prio=0 tid=0x0000000001896000 
nid=0x114b runnable

"GC task thread#1 (ParallelGC)" os_prio=0 tid=0x0000000001898000 
nid=0x114c runnable

"VM Periodic Task Thread" os_prio=0 tid=0x000000000198d800 nid=0x1154 
waiting on condition

JNI global references: 389

Heap
  PSYoungGen      total 9728K, used 4357K [0x00000000f5900000, 
0x00000000f6380000, 0x0000000100000000)
   eden space 8704K, 50% used 
[0x00000000f5900000,0x00000000f5d415a0,0x00000000f6180000)
   from space 1024K, 0% used 
[0x00000000f6280000,0x00000000f6280000,0x00000000f6380000)
   to   space 1024K, 0% used 
[0x00000000f6180000,0x00000000f6180000,0x00000000f6280000)
  ParOldGen       total 22016K, used 0K [0x00000000e0a00000, 
0x00000000e1f80000, 0x00000000f5900000)
   object space 22016K, 0% used 
[0x00000000e0a00000,0x00000000e0a00000,0x00000000e1f80000)
  Metaspace       used 8578K, capacity 8728K, committed 8832K, reserved 
1056768K
   class space    used 980K, capacity 1058K, committed 1152K, reserved 
1048576K

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Thread

javax.swing.Timer blocking program termination Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2015-07-13 16:03 -0700
  Re: javax.swing.Timer blocking program termination Jeff Higgins <jeff@invalid.invalid> - 2015-07-13 20:27 -0400
    Re: javax.swing.Timer blocking program termination Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2015-07-13 17:46 -0700
      Re: javax.swing.Timer blocking program termination Jeff Higgins <jeff@invalid.invalid> - 2015-07-13 21:35 -0400
        Re: javax.swing.Timer blocking program termination Jeff Higgins <jeff@invalid.invalid> - 2015-07-13 22:13 -0400
          Re: javax.swing.Timer blocking program termination Jeff Higgins <jeff@invalid.invalid> - 2015-07-13 22:27 -0400
          Re: javax.swing.Timer blocking program termination e.d.programmer@gmail.com - 2015-07-14 06:31 -0700
            Re: javax.swing.Timer blocking program termination Jeff Higgins <jeff@invalid.invalid> - 2015-07-14 10:15 -0400
              Re: javax.swing.Timer blocking program termination Jeff Higgins <jeff@invalid.invalid> - 2015-07-14 10:22 -0400
              Re: javax.swing.Timer blocking program termination e.d.programmer@gmail.com - 2015-07-14 07:39 -0700
                Re: javax.swing.Timer blocking program termination Eric Sosman <esosman@comcast-dot-net.invalid> - 2015-07-14 10:53 -0400
                Re: javax.swing.Timer blocking program termination e.d.programmer@gmail.com - 2015-07-14 10:16 -0700
                Re: javax.swing.Timer blocking program termination Eric Sosman <esosman@comcast-dot-net.invalid> - 2015-07-14 13:25 -0400
                Re: javax.swing.Timer blocking program termination e.d.programmer@gmail.com - 2015-07-14 10:45 -0700
                Re: javax.swing.Timer blocking program termination Eric Sosman <esosman@comcast-dot-net.invalid> - 2015-07-14 14:16 -0400
                Re: javax.swing.Timer blocking program termination Gene Wirchenko <genew@telus.net> - 2015-07-14 12:56 -0700
                Re: javax.swing.Timer blocking program termination Eric Sosman <esosman@comcast-dot-net.invalid> - 2015-07-14 16:14 -0400
                Re: javax.swing.Timer blocking program termination e.d.programmer@gmail.com - 2015-07-15 05:11 -0700
                Re: javax.swing.Timer blocking program termination Jeff Higgins <jeff@invalid.invalid> - 2015-07-15 08:33 -0400
                Re: javax.swing.Timer blocking program termination Martin Gregorie <martin@address-in-sig.invalid> - 2015-07-15 18:46 +0000
                Re: javax.swing.Timer blocking program termination Jeff Higgins <jeff@invalid.invalid> - 2015-07-15 21:18 -0400
                Re: javax.swing.Timer blocking program termination Jeff Higgins <jeff@invalid.invalid> - 2015-07-15 22:13 -0400
                Re: javax.swing.Timer blocking program termination Jeff Higgins <jeff@invalid.invalid> - 2015-07-14 10:55 -0400
                Re: javax.swing.Timer blocking program termination Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2015-07-14 08:17 -0700
                Re: javax.swing.Timer blocking program termination Jeff Higgins <jeff@invalid.invalid> - 2015-07-14 11:42 -0400
                Re: javax.swing.Timer blocking program termination Martin Gregorie <martin@address-in-sig.invalid> - 2015-07-14 18:35 +0000
                Re: javax.swing.Timer blocking program termination Jeff Higgins <jeff@invalid.invalid> - 2015-07-14 15:17 -0400
                Re: javax.swing.Timer blocking program termination Jeff Higgins <jeff@invalid.invalid> - 2015-07-14 15:36 -0400
                Re: javax.swing.Timer blocking program termination Eric Sosman <esosman@comcast-dot-net.invalid> - 2015-07-14 15:51 -0400
                Re: javax.swing.Timer blocking program termination Martin Gregorie <martin@address-in-sig.invalid> - 2015-07-14 21:51 +0000
                Re: javax.swing.Timer blocking program termination Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2015-07-14 15:08 -0700
                Re: javax.swing.Timer blocking program termination Martin Gregorie <martin@address-in-sig.invalid> - 2015-07-15 01:16 +0000
                Re: javax.swing.Timer blocking program termination Jeff Higgins <jeff@invalid.invalid> - 2015-07-14 16:09 -0400
                Re: javax.swing.Timer blocking program termination Jeff Higgins <jeff@invalid.invalid> - 2015-07-14 18:32 -0400
                Re: javax.swing.Timer blocking program termination Jeff Higgins <jeff@invalid.invalid> - 2015-07-14 18:34 -0400
                Re: javax.swing.Timer blocking program termination Jeff Higgins <jeff@invalid.invalid> - 2015-07-14 20:31 -0400
                Re: javax.swing.Timer blocking program termination Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2015-07-14 08:16 -0700
  Re: javax.swing.Timer blocking program termination Joerg Meier <joergmmeier@arcor.de> - 2015-07-14 08:32 +0200
  Re: javax.swing.Timer blocking program termination Jeff Higgins <jeff@invalid.invalid> - 2015-07-14 22:18 -0400
  Re: javax.swing.Timer blocking program termination Jeff Higgins <jeff@invalid.invalid> - 2015-07-15 08:26 -0400
    Re: javax.swing.Timer blocking program termination Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2015-07-15 11:05 -0700

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