为什么javaw.exe不会退出Windows 8？

Question

我正在使用Java 1.6.0_41，当帧即将关闭时，我会附加一个侦听器。成功调用System.exit(0)并关闭应用程序窗口。但是，在任务管理器中，javaw.exe仍在运行。 哪个线程导致阻塞？

更新 看起来awt.windows仍在运行，因此关闭钩子没有完成。在调用System.exit之前在Windows 8上调用dispose（）允许我的应用关闭并退出jvm。

 2014-10-15 12:31:58
Full thread dump Java HotSpot(TM) 64-Bit Server VM (20.14-b01 mixed mode):

"RMI TCP Connection(2)-192.168.10.70" daemon prio=6 tid=0x00000000075a3000 nid=0x163c runnable [0x000000000a7df000]
   java.lang.Thread.State: RUNNABLE
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.read(SocketInputStream.java:129)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:218)
at java.io.BufferedInputStream.read(BufferedInputStream.java:237)
- locked <0x00000007ac9dc9c0> (a java.io.BufferedInputStream)
at java.io.FilterInputStream.read(FilterInputStream.java:66)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:517)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
at java.lang.Thread.run(Thread.java:662)

   Locked ownable synchronizers:
- <0x00000007ac778c70> (a java.util.concurrent.locks.ReentrantLock$NonfairSync)

"JMX server connection timeout 84" daemon prio=6 tid=0x00000000075a4800 nid=0xd74 in Object.wait() [0x000000000a6df000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x00000007ac848288> (a [I)
at com.sun.jmx.remote.internal.ServerCommunicatorAdmin$Timeout.run(ServerCommunicatorAdmin.java:150)
- locked <0x00000007ac848288> (a [I)
at java.lang.Thread.run(Thread.java:662)

   Locked ownable synchronizers:
- None

"RMI Scheduler(0)" daemon prio=6 tid=0x00000000075a6000 nid=0xf9c waiting on condition [0x000000000a5df000]
   java.lang.Thread.State: TIMED_WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for  <0x00000007ac4abc20> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:196)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2025)
at java.util.concurrent.DelayQueue.take(DelayQueue.java:164)
at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:609)
at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:602)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:957)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:917)
at java.lang.Thread.run(Thread.java:662)

   Locked ownable synchronizers:
- None

"RMI TCP Connection(1)-192.168.10.70" daemon prio=6 tid=0x00000000075a2000 nid=0xedc runnable [0x000000000a30f000]
   java.lang.Thread.State: RUNNABLE
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.read(SocketInputStream.java:129)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:218)
at java.io.BufferedInputStream.read(BufferedInputStream.java:237)
- locked <0x00000007ac7d3670> (a java.io.BufferedInputStream)
at java.io.FilterInputStream.read(FilterInputStream.java:66)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:517)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
at java.lang.Thread.run(Thread.java:662)

   Locked ownable synchronizers:
- <0x00000007ac7767c0> (a java.util.concurrent.locks.ReentrantLock$NonfairSync)

"RMI TCP Accept-0" daemon prio=6 tid=0x00000000075a1800 nid=0x378 runnable [0x000000000994f000]
   java.lang.Thread.State: RUNNABLE
at java.net.PlainSocketImpl.socketAccept(Native Method)
at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:408)
- locked <0x00000007ac4b5c38> (a java.net.SocksSocketImpl)
at java.net.ServerSocket.implAccept(ServerSocket.java:462)
at java.net.ServerSocket.accept(ServerSocket.java:430)
at sun.management.jmxremote.LocalRMIServerSocketFactory$1.accept(LocalRMIServerSocketFactory.java:34)
at sun.rmi.transport.tcp.TCPTransport$AcceptLoop.executeAcceptLoop(TCPTransport.java:369)
at sun.rmi.transport.tcp.TCPTransport$AcceptLoop.run(TCPTransport.java:341)
at java.lang.Thread.run(Thread.java:662)

   Locked ownable synchronizers:
- None

"Thread-4" daemon prio=6 tid=0x00000000075a3800 nid=0x518 runnable [0x000000000bddf000]
   java.lang.Thread.State: RUNNABLE
at sun.awt.windows.WToolkit.shutdown(Native Method)
at sun.awt.windows.WToolkit.access$200(WToolkit.java:70)
at sun.awt.windows.WToolkit$2$1.run(WToolkit.java:278)
at java.lang.Thread.run(Thread.java:662)

   Locked ownable synchronizers:
- None

"Timer-1" daemon prio=6 tid=0x000000000e21e000 nid=0xbc in Object.wait() [0x000000001095f000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x00000007049a7bb0> (a java.util.TaskQueue)
at java.util.TimerThread.mainLoop(Timer.java:509)
- locked <0x00000007049a7bb0> (a java.util.TaskQueue)
at java.util.TimerThread.run(Timer.java:462)

   Locked ownable synchronizers:
- None

"Timer-0" daemon prio=6 tid=0x000000000e219800 nid=0x1454 in Object.wait() [0x000000001085f000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x0000000704ac9d30> (a java.util.TaskQueue)
at java.util.TimerThread.mainLoop(Timer.java:509)
- locked <0x0000000704ac9d30> (a java.util.TaskQueue)
at java.util.TimerThread.run(Timer.java:462)

   Locked ownable synchronizers:
- None

"DestroyJavaVM" prio=6 tid=0x000000000e21b800 nid=0xba8 waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

   Locked ownable synchronizers:
- None

"TimerQueue" daemon prio=6 tid=0x000000000e21c800 nid=0x1548 in Object.wait() [0x000000000facf000]
   java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x0000000704827188> (a javax.swing.TimerQueue)
at javax.swing.TimerQueue.run(TimerQueue.java:232)
- locked <0x0000000704827188> (a javax.swing.TimerQueue)
at java.lang.Thread.run(Thread.java:662)

   Locked ownable synchronizers:
- None

"AWT-EventQueue-0" prio=6 tid=0x00000000089b8800 nid=0xd60 in Object.wait() [0x000000000bfdd000]
   java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x00000007045d60e0> (a java.lang.Thread)
at java.lang.Thread.join(Thread.java:1186)
- locked <0x00000007045d60e0> (a java.lang.Thread)
at java.lang.Thread.join(Thread.java:1239)
at java.lang.ApplicationShutdownHooks.runHooks(ApplicationShutdownHooks.java:79)
at java.lang.ApplicationShutdownHooks$1.run(ApplicationShutdownHooks.java:24)
at java.lang.Shutdown.runHooks(Shutdown.java:79)
at java.lang.Shutdown.sequence(Shutdown.java:123)
at java.lang.Shutdown.exit(Shutdown.java:168)
- locked <0x00000006fe24ca68> (a java.lang.Class for java.lang.Shutdown)
at java.lang.Runtime.exit(Runtime.java:90)
at java.lang.System.exit(System.java:904)
at com.hiddensoftware.hiddengui.HiddenFrame.attemptToExit(HiddenFrame.java:636)
at com.hiddensoftware.hiddengui.HiddenFrame.exit(HiddenFrame.java:620)
at com.hiddensoftware.hiddengui.HiddenFrame$14.windowClosing(HiddenFrame.java:2554)
at java.awt.AWTEventMulticaster.windowClosing(AWTEventMulticaster.java:332)
at java.awt.Window.processWindowEvent(Window.java:1871)
at javax.swing.JFrame.processWindowEvent(JFrame.java:274)
at java.awt.Window.processEvent(Window.java:1829)
at java.awt.Component.dispatchEventImpl(Component.java:4660)
at java.awt.Container.dispatchEventImpl(Container.java:2097)
at java.awt.Window.dispatchEventImpl(Window.java:2489)
at java.awt.Component.dispatchEvent(Component.java:4488)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:674)
at java.awt.EventQueue.access$400(EventQueue.java:81)
at java.awt.EventQueue$2.run(EventQueue.java:633)
at java.awt.EventQueue$2.run(EventQueue.java:631)
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:647)
at java.awt.EventQueue$3.run(EventQueue.java:645)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:644)
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)

   Locked ownable synchronizers:
- None

"AWT-Windows" daemon prio=6 tid=0x000000000857d800 nid=0xe74 runnable [0x0000000009d0f000]
   java.lang.Thread.State: RUNNABLE
at sun.awt.windows.WToolkit.eventLoop(Native Method)
at sun.awt.windows.WToolkit.run(WToolkit.java:293)
at java.lang.Thread.run(Thread.java:662)

   Locked ownable synchronizers:
- None

"AWT-Shutdown" prio=6 tid=0x000000000857c800 nid=0x28c in Object.wait() [0x0000000009c0f000]
   java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x0000000704ae1ba8> (a java.lang.Object)
at java.lang.Object.wait(Object.java:485)
at sun.awt.AWTAutoShutdown.run(AWTAutoShutdown.java:265)
- locked <0x0000000704ae1ba8> (a java.lang.Object)
at java.lang.Thread.run(Thread.java:662)

   Locked ownable synchronizers:
- None

"Java2D Disposer" daemon prio=10 tid=0x00000000075b5000 nid=0x13d0 in Object.wait() [0x0000000009a4f000]
   java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x0000000704906618> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:118)
- locked <0x0000000704906618> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:134)
at sun.java2d.Disposer.run(Disposer.java:127)
at java.lang.Thread.run(Thread.java:662)

   Locked ownable synchronizers:
- None

"Low Memory Detector" daemon prio=6 tid=0x0000000007561800 nid=0xef4 runnable [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

   Locked ownable synchronizers:
- None

"C2 CompilerThread1" daemon prio=10 tid=0x00000000074f2800 nid=0x1474 waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

   Locked ownable synchronizers:
- None

"C2 CompilerThread0" daemon prio=10 tid=0x00000000074f1000 nid=0x105c waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

   Locked ownable synchronizers:
- None

"JDWP Command Reader" daemon prio=6 tid=0x00000000021dd000 nid=0xc8c runnable [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

   Locked ownable synchronizers:
- None

"JDWP Event Helper Thread" daemon prio=6 tid=0x00000000021d5800 nid=0xe38 runnable [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

   Locked ownable synchronizers:
- None

"JDWP Transport Listener: dt_socket" daemon prio=6 tid=0x00000000021d1800 nid=0x15d0 runnable [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

   Locked ownable synchronizers:
- None

"Attach Listener" daemon prio=10 tid=0x00000000021bf000 nid=0x16fc waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

   Locked ownable synchronizers:
- None

"Signal Dispatcher" daemon prio=10 tid=0x00000000021be000 nid=0x1010 runnable [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

   Locked ownable synchronizers:
- None

"Finalizer" daemon prio=8 tid=0x00000000021a4000 nid=0x1070 in Object.wait() [0x0000000006c5f000]
   java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x00000007044c0f68> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:118)
- locked <0x00000007044c0f68> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:134)
at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:159)

   Locked ownable synchronizers:
- None

"Reference Handler" daemon prio=10 tid=0x00000000021a0800 nid=0x12e4 in Object.wait() [0x0000000006b5f000]
   java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x00000007044c0f00> (a java.lang.ref.Reference$Lock)
at java.lang.Object.wait(Object.java:485)
at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:116)
- locked <0x00000007044c0f00> (a java.lang.ref.Reference$Lock)

   Locked ownable synchronizers:
- None

"VM Thread" prio=10 tid=0x000000000219a800 nid=0x17ec runnable 

"GC task thread#0 (ParallelGC)" prio=6 tid=0x00000000020f6800 nid=0xfbc runnable 

"GC task thread#1 (ParallelGC)" prio=6 tid=0x00000000020f8800 nid=0xa18 runnable 

"GC task thread#2 (ParallelGC)" prio=6 tid=0x00000000020fa000 nid=0x1634 runnable 

"GC task thread#3 (ParallelGC)" prio=6 tid=0x00000000020fb800 nid=0x16c4 runnable 

"VM Periodic Task Thread" prio=10 tid=0x0000000007507000 nid=0x16b0 waiting on condition 

JNI global references: 16785

Answer 1

这非常简单...在调用System.exit（0）之前正确调用UI组件上的dispose（）解决了我的问题。似乎依赖Windows 7上的System.exit（0）关闭您的资源，但在Windows 8上它并没有。如果查看线程转储，可以看到awt.windows在edt的关闭阶段有一个仍在运行的线程，因此edt无法退出。