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Tomcat阻止并且没有响应

[英]Tomcat Blocks and Not Responding

 原文  2015-02-08 16:01:17  2   1    java/ tomcat/ servlets/ http-unit/ junitperf

问题描述

我有一个tomcat服务器，并且正在使用junitperf运行性能测试。

我每次都会创建20个同时请求。

好的，这就是问题所在：有时，它返回的速度非常快，所有20个请求在3秒内得到响应； 但在其他时候，它似乎永远被阻止并且从未完成（实际上，这些请求中的大约18个，19个将完成，而其余1个或2个只是被永久阻止了）

这是我尝试调试问题的方法：

在客户端： 

WebConversation webConversation = new WebConversation();
System.out.println("Before calling " + url);
WebResponse response = webConversation.getResponse(request);
System.err.println("Called " + url);

在服务器端，在Servlet函数的第一行，我有： 

logger.debug("Enter Servlet");

现在，当它阻塞时，在客户端，我可以看到20“呼叫前”和18,19“被呼叫...”。 在服务器端，我也只看到18,19“ Enter Servlet”日志。

所以我认为问题是，客户端已经发送了请求，但是Tomcat服务器没有响应它们，甚至没有调用Servlet函数。

同时，当我检查日志时，没有发现任何有关为什么阻止日志的信息。 没有错误信息，也没有异常，什么都没有。

有人可以帮我弄这个吗？

编辑＃2：

这是一个完整的线程转储： 

2015-02-08 11:20:09
Full thread dump Java HotSpot(TM) 64-Bit Server VM (24.71-b01 mixed mode):

"http-bio-8080-exec-20" daemon prio=5 tid=0x00007facdf803000 nid=0x7c03 waiting on condition [0x000000011796a000]
   java.lang.Thread.State: WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x00000007bacb8918> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
    at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2043)
    at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:104)
    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:32)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1068)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)

"http-bio-8080-exec-19" daemon prio=5 tid=0x00007facdf802800 nid=0x7a03 waiting on condition [0x0000000117867000]
   java.lang.Thread.State: WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x00000007bacb8918> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
    at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2043)
    at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:104)
    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:32)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1068)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)

"http-bio-8080-exec-18" daemon prio=5 tid=0x00007facdbb0b800 nid=0x7803 waiting on condition [0x0000000117764000]
   java.lang.Thread.State: WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x00000007bacb8918> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
    at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2043)
    at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:104)
    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:32)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1068)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)

"http-bio-8080-exec-11" daemon prio=5 tid=0x00007facdb845000 nid=0x6a03 waiting on condition [0x000000011704f000]
   java.lang.Thread.State: WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x00000007bacb8918> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
    at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2043)
    at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:104)
    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:32)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1068)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)

"http-bio-8080-exec-9" daemon prio=5 tid=0x00007facdf05b800 nid=0x6603 waiting on condition [0x0000000116e49000]
   java.lang.Thread.State: WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x00000007bacb8918> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
    at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2043)
    at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:104)
    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:32)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1068)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)

"http-bio-8080-exec-8" daemon prio=5 tid=0x00007facdd803000 nid=0x6403 waiting on condition [0x0000000116d46000]
   java.lang.Thread.State: WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x00000007bacb8918> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
    at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2043)
    at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:104)
    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:32)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1068)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)

"http-bio-8080-exec-7" daemon prio=5 tid=0x00007facdd801000 nid=0x6203 waiting on condition [0x0000000116c43000]
   java.lang.Thread.State: WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x00000007bacb8918> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
    at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2043)
    at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:104)
    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:32)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1068)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)

"http-bio-8080-exec-4" daemon prio=5 tid=0x00007facdf801000 nid=0x3807 waiting on condition [0x0000000115ace000]
   java.lang.Thread.State: WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x00000007bacb8918> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
    at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2043)
    at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:104)
    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:32)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1068)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)

"http-bio-8080-exec-3" daemon prio=5 tid=0x00007facdf800000 nid=0x3407 waiting on condition [0x0000000115825000]
   java.lang.Thread.State: WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x00000007bacb8918> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
    at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2043)
    at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:104)
    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:32)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1068)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)

"http-bio-8080-exec-1" daemon prio=5 tid=0x00007facdd001000 nid=0x4b07 waiting on condition [0x0000000113366000]
   java.lang.Thread.State: WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x00000007bacb8918> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
    at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2043)
    at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:104)
    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:32)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1068)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)

"ajp-bio-8009-AsyncTimeout" daemon prio=5 tid=0x00007facda97d800 nid=0x5703 waiting on condition [0x0000000116a3d000]
   java.lang.Thread.State: TIMED_WAITING (sleeping)
    at java.lang.Thread.sleep(Native Method)
    at org.apache.tomcat.util.net.JIoEndpoint$AsyncTimeout.run(JIoEndpoint.java:152)
    at java.lang.Thread.run(Thread.java:745)

"ajp-bio-8009-Acceptor-0" daemon prio=5 tid=0x00007facdaa51800 nid=0x5503 runnable [0x000000011693a000]
   java.lang.Thread.State: RUNNABLE
    at java.net.PlainSocketImpl.socketAccept(Native Method)
    at java.net.AbstractPlainSocketImpl.accept(AbstractPlainSocketImpl.java:398)
    at java.net.ServerSocket.implAccept(ServerSocket.java:530)
    at java.net.ServerSocket.accept(ServerSocket.java:498)
    at org.apache.tomcat.util.net.DefaultServerSocketFactory.acceptSocket(DefaultServerSocketFactory.java:60)
    at org.apache.tomcat.util.net.JIoEndpoint$Acceptor.run(JIoEndpoint.java:220)
    at java.lang.Thread.run(Thread.java:745)

"http-bio-8080-AsyncTimeout" daemon prio=5 tid=0x00007facdaaec800 nid=0x5303 waiting on condition [0x0000000116837000]
   java.lang.Thread.State: TIMED_WAITING (sleeping)
    at java.lang.Thread.sleep(Native Method)
    at org.apache.tomcat.util.net.JIoEndpoint$AsyncTimeout.run(JIoEndpoint.java:152)
    at java.lang.Thread.run(Thread.java:745)

"http-bio-8080-Acceptor-0" daemon prio=5 tid=0x00007facdab7b000 nid=0x5103 runnable [0x0000000116734000]
   java.lang.Thread.State: RUNNABLE
    at java.net.PlainSocketImpl.socketAccept(Native Method)
    at java.net.AbstractPlainSocketImpl.accept(AbstractPlainSocketImpl.java:398)
    at java.net.ServerSocket.implAccept(ServerSocket.java:530)
    at java.net.ServerSocket.accept(ServerSocket.java:498)
    at org.apache.tomcat.util.net.DefaultServerSocketFactory.acceptSocket(DefaultServerSocketFactory.java:60)
    at org.apache.tomcat.util.net.JIoEndpoint$Acceptor.run(JIoEndpoint.java:220)
    at java.lang.Thread.run(Thread.java:745)

"ContainerBackgroundProcessor[StandardEngine[Catalina]]" daemon prio=5 tid=0x00007facda994800 nid=0x4f03 waiting on condition [0x000000011627c000]
   java.lang.Thread.State: TIMED_WAITING (sleeping)
    at java.lang.Thread.sleep(Native Method)
    at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1513)
    at java.lang.Thread.run(Thread.java:745)

"GC Daemon" daemon prio=5 tid=0x00007facdb940800 nid=0x4903 in Object.wait() [0x0000000115412000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on <0x0000000701b92758> (a sun.misc.GC$LatencyLock)
    at sun.misc.GC$Daemon.run(GC.java:117)
    - locked <0x0000000701b92758> (a sun.misc.GC$LatencyLock)

"Service Thread" daemon prio=5 tid=0x00007facda014000 nid=0x4503 runnable [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"C2 CompilerThread1" daemon prio=5 tid=0x00007facda00e000 nid=0x4303 waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"C2 CompilerThread0" daemon prio=5 tid=0x00007facda81c800 nid=0x4103 waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"Signal Dispatcher" daemon prio=5 tid=0x00007facda81b800 nid=0x3f07 waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"Finalizer" daemon prio=5 tid=0x00007facdb005800 nid=0x3003 in Object.wait() [0x000000011322a000]
   java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on <0x0000000701bb32d0> (a java.lang.ref.ReferenceQueue$Lock)
    at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:135)
    - locked <0x0000000701bb32d0> (a java.lang.ref.ReferenceQueue$Lock)
    at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:151)
    at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:209)

"Reference Handler" daemon prio=5 tid=0x00007facdb005000 nid=0x2e03 in Object.wait() [0x0000000113127000]
   java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on <0x0000000701bb2e30> (a java.lang.ref.Reference$Lock)
    at java.lang.Object.wait(Object.java:503)
    at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:133)
    - locked <0x0000000701bb2e30> (a java.lang.ref.Reference$Lock)

"main" prio=5 tid=0x00007facda806000 nid=0x1903 runnable [0x0000000102398000]
   java.lang.Thread.State: RUNNABLE
    at java.net.PlainSocketImpl.socketAccept(Native Method)
    at java.net.AbstractPlainSocketImpl.accept(AbstractPlainSocketImpl.java:398)
    at java.net.ServerSocket.implAccept(ServerSocket.java:530)
    at java.net.ServerSocket.accept(ServerSocket.java:498)
    at org.apache.catalina.core.StandardServer.await(StandardServer.java:453)
    at org.apache.catalina.startup.Catalina.await(Catalina.java:777)
    at org.apache.catalina.startup.Catalina.start(Catalina.java:723)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:321)
    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:455)

"VM Thread" prio=5 tid=0x00007facdb002000 nid=0x2c03 runnable 

"GC task thread#0 (ParallelGC)" prio=5 tid=0x00007facda813000 nid=0x1c03 runnable 

"GC task thread#1 (ParallelGC)" prio=5 tid=0x00007facdb800000 nid=0x1e03 runnable 

"GC task thread#2 (ParallelGC)" prio=5 tid=0x00007facdb801000 nid=0x2003 runnable 

"GC task thread#3 (ParallelGC)" prio=5 tid=0x00007facda00b000 nid=0x2203 runnable 

"GC task thread#4 (ParallelGC)" prio=5 tid=0x00007facda813800 nid=0x2403 runnable 

"GC task thread#5 (ParallelGC)" prio=5 tid=0x00007facda814800 nid=0x2603 runnable 

"GC task thread#6 (ParallelGC)" prio=5 tid=0x00007facdb801800 nid=0x2803 runnable 

"GC task thread#7 (ParallelGC)" prio=5 tid=0x00007facdb802000 nid=0x2a03 runnable 

"VM Periodic Task Thread" prio=5 tid=0x00007facda01c800 nid=0x4703 waiting on condition 

JNI global references: 161

Heap
 PSYoungGen      total 289280K, used 132571K [0x00000007aaa80000, 0x00000007cdf80000, 0x0000000800000000)
  eden space 264192K, 46% used [0x00000007aaa80000,0x00000007b234ee68,0x00000007bac80000)
  from space 25088K, 35% used [0x00000007bac80000,0x00000007bb528120,0x00000007bc500000)
  to   space 25088K, 0% used [0x00000007cc700000,0x00000007cc700000,0x00000007cdf80000)
 ParOldGen       total 174592K, used 29377K [0x0000000700000000, 0x000000070aa80000, 0x00000007aaa80000)
  object space 174592K, 16% used [0x0000000700000000,0x0000000701cb0620,0x000000070aa80000)
 PSPermGen       total 21504K, used 17514K [0x00000006fae00000, 0x00000006fc300000, 0x0000000700000000)
  object space 21504K, 81% used [0x00000006fae00000,0x00000006fbf1aa00,0x00000006fc300000)

1 个解决方案

解决方案1
 0  2015-03-27 23:47:26

如果我仍然使用另一台计算机来运行客户端程序，则可以解决此问题（我最初使用的是本地计算机，即Mac OS X，然后切换到Fedora）。 所以我想这是客户的问题。 但是，实际原因尚不清楚。

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