Tomcat webapp錯誤-應用程序啟動了線程[AWT-Windows]，但未能將其停止-內存泄漏？

Question

直到今天，在我的PC上進行本地測試時，我才注意到它，即Tomcat在日志文件中發布了錯誤。 我正在使用Tomcat 6.0.29和Java JDK 1.6。

Dec 1, 2010 12:36:57 pm org.apache.catalina.core.StandardContext reload INFO: Reloading this Context has started Dec 1, 2010 12:36:57 pm org.apache.catalina.loader.WebappClassLoader clearReferencesThreads SEVER: The web application [/AutoSpyder] appears to have started a thread named [AWT-Windows] but has failed to stop it. This is very likely to create a memory leak.

什么？ 我以前從未見過這個。 因此，我從昨天開始檢查了我的日志文件，當然，這個錯誤也在那里。 我不太明白是什么原因造成的。

我是否可以假定它必須是使用java.awt包中的對象的servlet之一？ 如果是這樣，我如何查明導致這種情況的代碼？

編輯添加線程轉儲

2010-12-01 14:28:18
Full thread dump Java HotSpot(TM) Client VM (17.1-b03 mixed mode, sharing):

"JMX server connection timeout 34" daemon prio=6 tid=0x03069400 nid=0x960 in Object.wait() [0x0461f000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on  (a [I)
    at com.sun.jmx.remote.internal.ServerCommunicatorAdmin$Timeout.run(ServerCommunicatorAdmin.java:150)
    - locked  (a [I)
    at java.lang.Thread.run(Thread.java:662)

   Locked ownable synchronizers:
    - None

"RMI Scheduler(0)" daemon prio=6 tid=0x03069000 nid=0xe88 waiting on condition [0x045cf000]
   java.lang.Thread.State: TIMED_WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for   (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
    at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:198)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer$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:947)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
    at java.lang.Thread.run(Thread.java:662)

   Locked ownable synchronizers:
    - None

"RMI TCP Connection(1)-192.168.0.102" daemon prio=6 tid=0x0308a400 nid=0xebc runnable [0x0457f000]
   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  (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$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:662)

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

"RMI TCP Accept-0" daemon prio=6 tid=0x039e0c00 nid=0xc68 runnable [0x0452f000]
   java.lang.Thread.State: RUNNABLE
    at java.net.PlainSocketImpl.socketAccept(Native Method)
    at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:390)
    - locked  (a java.net.SocksSocketImpl)
    at java.net.ServerSocket.implAccept(ServerSocket.java:453)
    at java.net.ServerSocket.accept(ServerSocket.java:421)
    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

"AWT-Windows" daemon prio=6 tid=0x02b65400 nid=0x7c4 runnable [0x042cf000]
   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

"Java2D Disposer" daemon prio=10 tid=0x02fccc00 nid=0x93c in Object.wait() [0x039df000]
   java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on  (a java.lang.ref.ReferenceQueue$Lock)
    at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:118)
    - locked  (a java.lang.ref.ReferenceQueue$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

"http-8080-6" daemon prio=6 tid=0x03322800 nid=0xfec in Object.wait() [0x0395f000]
   java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on  (a org.apache.tomcat.util.net.JIoEndpoint$Worker)
    at java.lang.Object.wait(Object.java:485)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.await(JIoEndpoint.java:458)
    - locked  (a org.apache.tomcat.util.net.JIoEndpoint$Worker)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:484)
    at java.lang.Thread.run(Thread.java:662)

   Locked ownable synchronizers:
    - None

"http-8080-5" daemon prio=6 tid=0x02ba5c00 nid=0xdbc in Object.wait() [0x0390f000]
   java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on  (a org.apache.tomcat.util.net.JIoEndpoint$Worker)
    at java.lang.Object.wait(Object.java:485)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.await(JIoEndpoint.java:458)
    - locked  (a org.apache.tomcat.util.net.JIoEndpoint$Worker)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:484)
    at java.lang.Thread.run(Thread.java:662)

   Locked ownable synchronizers:
    - None

"http-8080-4" daemon prio=6 tid=0x02ff6400 nid=0xa1c in Object.wait() [0x038bf000]
   java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on  (a org.apache.tomcat.util.net.JIoEndpoint$Worker)
    at java.lang.Object.wait(Object.java:485)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.await(JIoEndpoint.java:458)
    - locked  (a org.apache.tomcat.util.net.JIoEndpoint$Worker)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:484)
    at java.lang.Thread.run(Thread.java:662)

   Locked ownable synchronizers:
    - None

"http-8080-3" daemon prio=6 tid=0x0317e400 nid=0x850 in Object.wait() [0x0386f000]
   java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on  (a org.apache.tomcat.util.net.JIoEndpoint$Worker)
    at java.lang.Object.wait(Object.java:485)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.await(JIoEndpoint.java:458)
    - locked  (a org.apache.tomcat.util.net.JIoEndpoint$Worker)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:484)
    at java.lang.Thread.run(Thread.java:662)

   Locked ownable synchronizers:
    - None

"http-8080-2" daemon prio=6 tid=0x03314800 nid=0xf9c in Object.wait() [0x0381f000]
   java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on  (a org.apache.tomcat.util.net.JIoEndpoint$Worker)
    at java.lang.Object.wait(Object.java:485)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.await(JIoEndpoint.java:458)
    - locked  (a org.apache.tomcat.util.net.JIoEndpoint$Worker)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:484)
    at java.lang.Thread.run(Thread.java:662)

   Locked ownable synchronizers:
    - None

"http-8080-1" daemon prio=6 tid=0x02efe800 nid=0x250 in Object.wait() [0x037cf000]
   java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on  (a org.apache.tomcat.util.net.JIoEndpoint$Worker)
    at java.lang.Object.wait(Object.java:485)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.await(JIoEndpoint.java:458)
    - locked  (a org.apache.tomcat.util.net.JIoEndpoint$Worker)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:484)
    at java.lang.Thread.run(Thread.java:662)

   Locked ownable synchronizers:
    - None

"TP-Monitor" daemon prio=6 tid=0x02eed800 nid=0xd64 in Object.wait() [0x0375f000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on  (a org.apache.tomcat.util.threads.ThreadPool$MonitorRunnable)
    at org.apache.tomcat.util.threads.ThreadPool$MonitorRunnable.run(ThreadPool.java:565)
    - locked  (a org.apache.tomcat.util.threads.ThreadPool$MonitorRunnable)
    at java.lang.Thread.run(Thread.java:662)

   Locked ownable synchronizers:
    - None

"TP-Processor4" daemon prio=6 tid=0x0318b000 nid=0x998 runnable [0x0370f000]
   java.lang.Thread.State: RUNNABLE
    at java.net.PlainSocketImpl.socketAccept(Native Method)
    at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:390)
    - locked  (a java.net.SocksSocketImpl)
    at java.net.ServerSocket.implAccept(ServerSocket.java:453)
    at java.net.ServerSocket.accept(ServerSocket.java:421)
    at org.apache.jk.common.ChannelSocket.accept(ChannelSocket.java:312)
    at org.apache.jk.common.ChannelSocket.acceptConnections(ChannelSocket.java:666)
    at org.apache.jk.common.ChannelSocket$SocketAcceptor.runIt(ChannelSocket.java:877)
    at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:690)
    at java.lang.Thread.run(Thread.java:662)

   Locked ownable synchronizers:
    - None

"TP-Processor3" daemon prio=6 tid=0x0308f800 nid=0x92c in Object.wait() [0x036bf000]
   java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on  (a org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
    at java.lang.Object.wait(Object.java:485)
    at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:662)
    - locked  (a org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
    at java.lang.Thread.run(Thread.java:662)

   Locked ownable synchronizers:
    - None

"TP-Processor2" daemon prio=6 tid=0x03192400 nid=0xfac in Object.wait() [0x0366f000]
   java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on  (a org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
    at java.lang.Object.wait(Object.java:485)
    at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:662)
    - locked  (a org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
    at java.lang.Thread.run(Thread.java:662)

   Locked ownable synchronizers:
    - None

"TP-Processor1" daemon prio=6 tid=0x03182400 nid=0x8d8 in Object.wait() [0x0361f000]
   java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on  (a org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
    at java.lang.Object.wait(Object.java:485)
    at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:662)
    - locked  (a org.apache.tomcat.util.threads.ThreadPool$ControlRunnable)
    at java.lang.Thread.run(Thread.java:662)

   Locked ownable synchronizers:
    - None

"http-8080-Acceptor-0" daemon prio=6 tid=0x03172400 nid=0xf04 runnable [0x035cf000]
   java.lang.Thread.State: RUNNABLE
    at java.net.PlainSocketImpl.socketAccept(Native Method)
    at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:390)
    - locked  (a java.net.SocksSocketImpl)
    at java.net.ServerSocket.implAccept(ServerSocket.java:453)
    at java.net.ServerSocket.accept(ServerSocket.java:421)
    at org.apache.tomcat.util.net.DefaultServerSocketFactory.acceptSocket(DefaultServerSocketFactory.java:61)
    at org.apache.tomcat.util.net.JIoEndpoint$Acceptor.run(JIoEndpoint.java:352)
    at java.lang.Thread.run(Thread.java:662)

   Locked ownable synchronizers:
    - None

"ContainerBackgroundProcessor[StandardEngine[Catalina]]" daemon prio=6 tid=0x03163400 nid=0xbe8 waiting on condition [0x0357f000]
   java.lang.Thread.State: TIMED_WAITING (sleeping)
    at java.lang.Thread.sleep(Native Method)
    at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1579)
    at java.lang.Thread.run(Thread.java:662)

   Locked ownable synchronizers:
    - None

"GC Daemon" daemon prio=2 tid=0x0307bc00 nid=0x110 in Object.wait() [0x0349f000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on  (a sun.misc.GC$LatencyLock)
    at sun.misc.GC$Daemon.run(GC.java:100)
    - locked  (a sun.misc.GC$LatencyLock)

   Locked ownable synchronizers:
    - None

"Low Memory Detector" daemon prio=6 tid=0x02aecc00 nid=0x5b4 runnable [0x00000000]
   java.lang.Thread.State: RUNNABLE

   Locked ownable synchronizers:
    - None

"CompilerThread0" daemon prio=10 tid=0x02ae7000 nid=0x798 waiting on condition [0x00000000]
   java.lang.Thread.State: RUNNABLE

   Locked ownable synchronizers:
    - None

"Attach Listener" daemon prio=10 tid=0x02ae5800 nid=0xddc waiting on condition [0x00000000]
   java.lang.Thread.State: RUNNABLE

   Locked ownable synchronizers:
    - None

"Signal Dispatcher" daemon prio=10 tid=0x02ae4000 nid=0xc00 runnable [0x00000000]
   java.lang.Thread.State: RUNNABLE

   Locked ownable synchronizers:
    - None

"Finalizer" daemon prio=8 tid=0x02add400 nid=0x378 in Object.wait() [0x02caf000]
   java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on  (a java.lang.ref.ReferenceQueue$Lock)
    at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:118)
    - locked  (a java.lang.ref.ReferenceQueue$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=0x02adbc00 nid=0x474 in Object.wait() [0x02c5f000]
   java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on  (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  (a java.lang.ref.Reference$Lock)

   Locked ownable synchronizers:
    - None

"main" prio=6 tid=0x002b7000 nid=0x14c runnable [0x0090f000]
   java.lang.Thread.State: RUNNABLE
    at java.net.PlainSocketImpl.socketAccept(Native Method)
    at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:390)
    - locked  (a java.net.SocksSocketImpl)
    at java.net.ServerSocket.implAccept(ServerSocket.java:453)
    at java.net.ServerSocket.accept(ServerSocket.java:421)
    at org.apache.catalina.core.StandardServer.await(StandardServer.java:389)
    at org.apache.catalina.startup.Catalina.await(Catalina.java:662)
    at org.apache.catalina.startup.Catalina.start(Catalina.java:614)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)

   Locked ownable synchronizers:
    - None

"VM Thread" prio=10 tid=0x02ada400 nid=0x210 runnable 

"VM Periodic Task Thread" prio=10 tid=0x02aefc00 nid=0x79c waiting on condition 

JNI global references: 1529

Answer 1

嘗試進行線程轉儲以獲取服務器上運行的所有線程的列表。 由此，您可能可以根據堆棧跟蹤來精確指出哪個類啟動了線程

視窗

在控制台窗口上按ctrl + break

Unix的

在命令行中輸入： kill -3 <pid>

Answer 2

看起來您正在運行JMX，給人的印象是Tomcat JMX服務器可能實際上是在設置計時器線程。 除了您在JavaRanch上的並行帖子中提到的內容之外，轉儲中還有一個java2D線程。

我無法告訴100％，因為我不知道哪些線程是孤立線程的父級。 如果您可以確定，那將會有所幫助。

但是，您的Affine Transform肯定會引入圖形。 這是一種圖形功能，它將嘗試將您的視頻卡用作硬件加速器。 如果您沒有指定無頭操作，它將進入您的窗口系統。

Answer 3

受此線程的啟發，我找到了以下解決方案：

您只需要將AWT-Window-Thread附加到System-Classloader，而不是Wabapp-Classloader。 您可以像這樣在ServletContextListener中進行操作：

public void contextInitialized(ServletContextEvent evt) {
    Thread thread = Thread.currentThread();
    ClassLoader ccl = thread.getContextClassLoader(); // PUSH
    try {
        thread.setContextClassLoader(ClassLoader.getSystemClassLoader());
        Toolkit.getDefaultToolkit().createImage(new byte[]{});
    } finally {
        thread.setContextClassLoader(ccl); // POP
    }
}

Answer 4

這與Windows（即MS Windows）和對底層OS的本地調用有關。 這些通常是GUI類型的窗口操作，但也可能是其他特定於OS的事物，例如與剪貼板或字體相關。

但是，如果沒有明顯的代碼可以引起您的觸發，那么我就不用擔心-該警告更多地是在沒有取消Web應用程序中新線程的一般情況下進行的。您應該明確地做一些事情，而不完全了解潛在問題。

Answer 5

我們有tomcat服務器和jsf。 JSF客戶端將向服務器請求圖像，並使AWT-Windows線程啟動。 由於線程contextClassLoader是WebappClassLoader，因此似乎導致內存泄漏。

看起來像調用Java2DResource可能導致創建AWT-Windows線程-

守護程序線程[http-8080-1]（已暫停（在線程中輸入方法））
線程。（Runnable，字符串）行：444 <-線程名稱是AWT-Windows WToolkit。（）行：244 NativeConstructorAccessorImpl.newInstance0（Constructor，Object []）行：不可用[本機方法]
NativeConstructorAccessorImpl.newInstance（Object []）行：39
DelegatingConstructorAccessorImpl.newInstance（Object []）行：27
Constructor.newInstance（Object ...）行：513 Class.newInstance0（）行：355
Class.newInstance（）行：308
Toolkit $ 2.run（）行：846
AccessController.doPrivileged（PrivilegedAction）行：不可用[本機方法]
Toolkit.getDefaultToolkit（）行：826
D3DGraphicsDevice。（）行：47
SurfaceManagerFactory.createCachingManager（BufferedImage）行：48
SurfaceManager.getManager（Image）行：54
SurfaceData.getDestSurfaceData（Image）行：123 Win32GraphicsEnvironment（SunGraphicsEnvironment）.createGraphics（BufferedImage）行：389
HeadlessGraphicsEnvironment.createGraphics（BufferedImage）行：76
BufferedImage.createGraphics（）行：1137
TabStripeImage（Java2Dresource）.getImage（ResourceContext）行：115
TabStripeImage（Java2Dresource）.send（ResourceContext）行：89
ResourceLifecycle.sendResource（ResourceContext，InternetResource）行：219 ResourceLifecycle.send（ResourceContext，InternetResource）行：158 InternetResourceService.load（Object，Object）行：335
LRUMapCache.load（Object，Object）行：116
LRUMapCache.get（Object，Object）行：87
InternetResourceService.serviceResource（String，HttpServletRequest，HttpServletResponse）行：195
InternetResourceService.serviceResource（HttpServletRequest，HttpServletResponse）行：141
Filter（BaseFilter）.doFilter（ServletRequest，ServletResponse，FilterChain）行：508 Ajax4jsfFilter.doFilter（ServletRequest，ServletResponse，FilterChain）行：56
SeamFilter $ FilterChainImpl.doFilter（ServletRequest，ServletResponse）行：69
LoggingFilter.doFilter（ServletRequest，ServletResponse，FilterChain）行：60
SeamFilter $ FilterChainImpl.doFilter（ServletRequest，ServletResponse）行：69
SeamFilter.doFilter（ServletRequest，ServletResponse，FilterChain）行：158 ApplicationFilterChain.internalDoFilter（ServletRequest，ServletResponse）行：235
ApplicationFilterChain.doFilter（ServletRequest，ServletResponse）行：206
StandardWrapperValve.invoke（Request，Response）行：233
StandardContextValve.invoke（Request，Response）行：191
StandardHostValve.invoke（Request，Response）行：127
ErrorReportValve.invoke（請求，響應）行：102
AccessLogValve.invoke（Request，Response）行：555
StandardEngineValve.invoke（Request，Response）行：109 CoyoteAdapter.service（Request，Response）行：298
Http11AprProcessor.process（long）行：861
Http11AprProtocol $ Http11ConnectionHandler.process（long）行：579
AprEndpoint $ Worker.run（）行：1584 Thread.run（）行：619 [本地變量不可用]

Answer 6

您是否正在運行包括Jasper，JFreechart，LiquidOffice，StyleReport等某些圖形庫，它們可能與AWT交互？

嘗試通過提供-Djava.awt.headless = true屬性來啟動tomcat，以查看它擺脫了異常