首页 \ 问答 \ 应用程序需要很长时间来终止(Application takes very long to terminate)

应用程序需要很长时间来终止(Application takes very long to terminate)

 我们已经编写了一个控制台应用程序（将用作服务），它启动几个工作线程来处理通过mina进入的请求。 当在特定网络端口上收到停止信号时，应用程序将离开主循环。 这是停止服务的预期方式。 这很好，但是当收到停止信号时，应用程序的进程不会立即终止（最多需要5分钟）。 我们通过日志消息验证了主函数快速并且如预期的那样，并且应用程序创建的所有线程也都被终止。 但应用程序继续运行。  
 在离开主函数之前仍然运行的线程是：  
Signal Dispatcher (java.lang.Thread)
Finalizer (java.lang.ref.Finalizer$FinalizerThread)
Abandoned connection cleanup thread (com.mysql.jdbc.AbandonedConnectionCleanupThread)
main (java.lang.Thread)
pool-2-thread-1 (java.lang.Thread)
Reference Handler (java.lang.ref.Reference$ReferenceHandler)
 
 我们正在使用以下java版本：  
java version "1.7.0_80"
Java(TM) SE Runtime Environment (build 1.7.0_80-b15)
Java HotSpot(TM) 64-Bit Server VM (build 24.80-b11, mixed mode)
 
 操作系统是Ubuntu 14.04 LTS。  
 我对这种行为毫无头绪，我希望能提供一些关于如何进一步调查这个问题的提示。  
 添加信息  
 我建议完成一个完整的线程转储。 四个线程正在等待：  
"pool-2-thread-1" prio=10 tid=0x00007fd7fc51f000 nid=0x16200 waiting on condition [0x00007fd800318000]
   java.lang.Thread.State: TIMED_WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x00000000cceaf660> (a java.util.concurrent.SynchronousQueue$TransferStack)
    at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:226)
    at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
    at java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:359)
    at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:942)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1068)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:745)

"Abandoned connection cleanup thread" daemon prio=10 tid=0x00007fd7fc23d800 nid=0x161e2 in Object.wait() [0x00007fd800cbb000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on <0x00000000dc2af720> (a java.lang.ref.ReferenceQueue$Lock)
    at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:135)
    - locked <0x00000000dc2af720> (a java.lang.ref.ReferenceQueue$Lock)
    at com.mysql.jdbc.AbandonedConnectionCleanupThread.run(AbandonedConnectionCleanupThread.java:41)

"Finalizer" daemon prio=10 tid=0x00007fd7fc066000 nid=0x161d6 in Object.wait() [0x00007fd801bd6000]
   java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on <0x00000000dc03c060> (a java.lang.ref.ReferenceQueue$Lock)
    at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:135)
    - locked <0x00000000dc03c060> (a java.lang.ref.ReferenceQueue$Lock)
    at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:151)
    at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:209)

"Reference Handler" daemon prio=10 tid=0x00007fd7fc064000 nid=0x161d5 in Object.wait() [0x00007fd801cd7000]
   java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on <0x00000000dc03c108> (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 <0x00000000dc03c108> (a java.lang.ref.Reference$Lock)
 
 有人可以证实，我应该调查泳池2线程1吗？ 我不确定如何解释结果。  
 解决方案最后，对acceptor.dispose（MINA）的调用做了诀窍... 

We have writen a console application (will be used as service) that starts several worker threads for handling requests coming in via mina. The application leaves the main loop when a stop signal is received on a specific network port. This is the intended way of stoping the service. That works quite ok, but when the stop signal is received the process of the application does not terminate immediatly (takes up to 5 minutes). We verified via log messages that the main function is left quickly and as expected and all threads created by the application are also terminated. But the application keeps on running. 
The threads still running before leaving the main function are: 
Signal Dispatcher (java.lang.Thread)
Finalizer (java.lang.ref.Finalizer$FinalizerThread)
Abandoned connection cleanup thread (com.mysql.jdbc.AbandonedConnectionCleanupThread)
main (java.lang.Thread)
pool-2-thread-1 (java.lang.Thread)
Reference Handler (java.lang.ref.Reference$ReferenceHandler)
 
We are currently using the following java version: 
java version "1.7.0_80"
Java(TM) SE Runtime Environment (build 1.7.0_80-b15)
Java HotSpot(TM) 64-Bit Server VM (build 24.80-b11, mixed mode)
 
The operation system is ubuntu 14.04 LTS. 
I have no clue about this behaviour and i hope for some hints on how to investigate that problem further. 
Addtional Information 
I have produced a Full thread dump as suggested. Four threads are waiting: 
"pool-2-thread-1" prio=10 tid=0x00007fd7fc51f000 nid=0x16200 waiting on condition [0x00007fd800318000]
   java.lang.Thread.State: TIMED_WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x00000000cceaf660> (a java.util.concurrent.SynchronousQueue$TransferStack)
    at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:226)
    at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
    at java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:359)
    at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:942)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1068)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:745)

"Abandoned connection cleanup thread" daemon prio=10 tid=0x00007fd7fc23d800 nid=0x161e2 in Object.wait() [0x00007fd800cbb000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on <0x00000000dc2af720> (a java.lang.ref.ReferenceQueue$Lock)
    at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:135)
    - locked <0x00000000dc2af720> (a java.lang.ref.ReferenceQueue$Lock)
    at com.mysql.jdbc.AbandonedConnectionCleanupThread.run(AbandonedConnectionCleanupThread.java:41)

"Finalizer" daemon prio=10 tid=0x00007fd7fc066000 nid=0x161d6 in Object.wait() [0x00007fd801bd6000]
   java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on <0x00000000dc03c060> (a java.lang.ref.ReferenceQueue$Lock)
    at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:135)
    - locked <0x00000000dc03c060> (a java.lang.ref.ReferenceQueue$Lock)
    at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:151)
    at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:209)

"Reference Handler" daemon prio=10 tid=0x00007fd7fc064000 nid=0x161d5 in Object.wait() [0x00007fd801cd7000]
   java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on <0x00000000dc03c108> (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 <0x00000000dc03c108> (a java.lang.ref.Reference$Lock)
 
Can someone confirm, that I should investigate towards pool-2-thread-1? I'm unsure how to interpret the result. 
Solution In the end a call to acceptor.dispose (MINA) did the trick...

原文：https://stackoverflow.com/questions/30120453

更新时间：2023-06-17 08:06

最满意答案

 我试图复制这个问题没有成功。  
 这是我的ViewScoped bean的属性：  
private String str1 = "a";

private String str2 = "b";

private String update = ":f:t";

private Integer index = 0;
 
 以下是观点：  
<h:form id="f">
    <p:tabView id="t" widgetVar="tVar" activeIndex="#{viewMBean.index}" >
        <p:tab id="a" title="A" >
            #{viewMBean.str1}
        </p:tab>
        <p:tab id="b" title="B">
            #{viewMBean.str2}
        </p:tab>
    </p:tabView>
</h:form>

<p:dialog id="d" widgetVar="dVar">
    <h:form>
        <p:inputText value="#{viewMBean.str1}" />
        <br />
        <p:inputText value="#{viewMBean.str2}" />
        <br />
        <p:inputText value="#{viewMBean.update}" />
        <br />
        <p:inputText value="#{viewMBean.index}" />
        <br />
        <p:commandButton value="Submit" update="#{viewMBean.update}" oncomplete="dVar.hide();" />
    </h:form>
</p:dialog>
 
 我相信问题出在代码中的其他地方。 

I've tried to replicate the problem with no success. 
Here is a the attribute from my ViewScoped bean: 
private String str1 = "a";

private String str2 = "b";

private String update = ":f:t";

private Integer index = 0;
 
And here is the view: 
<h:form id="f">
    <p:tabView id="t" widgetVar="tVar" activeIndex="#{viewMBean.index}" >
        <p:tab id="a" title="A" >
            #{viewMBean.str1}
        </p:tab>
        <p:tab id="b" title="B">
            #{viewMBean.str2}
        </p:tab>
    </p:tabView>
</h:form>

<p:dialog id="d" widgetVar="dVar">
    <h:form>
        <p:inputText value="#{viewMBean.str1}" />
        <br />
        <p:inputText value="#{viewMBean.str2}" />
        <br />
        <p:inputText value="#{viewMBean.update}" />
        <br />
        <p:inputText value="#{viewMBean.index}" />
        <br />
        <p:commandButton value="Submit" update="#{viewMBean.update}" oncomplete="dVar.hide();" />
    </h:form>
</p:dialog>
 
I believe the problem is somewhere else in your code.

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应用程序需要很长时间来终止(Application takes very long to terminate)

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