如何找出谁在java中创建线程？(how to find out who create a thread in java?)

 在tomcat中，如果webapp确实停止了一个无守护线程，那么tomcat不能通过shutdown.sh关闭 
 
 例如： 
 
public class demo implements ServletContextListener{

  public void contextDestroyed(ServletContextEvent arg0) {
    // TODO Auto-generated method stub
    // yes,we can cancel timer in here,but this is not the major problem
   }

  public void contextInitialized(ServletContextEvent arg0) {        
    Timer timer = new Timer();
    timer.schedule(new Test(), 1000, 1000*10);
    }
}

public class Test extends TimerTask{  
@Override
public void run() {
    System.out.println("AAAA");        
   }
}
 
 像上面那样，tomcat不能被shutdown.sh关闭。 从jvisualvm，线程检查员说： 
 
"Timer-0" - Thread t@40
   java.lang.Thread.State: TIMED_WAITING
    at java.lang.Object.wait(Native Method)
    - waiting on <3957edeb> (a java.util.TaskQueue)
    at java.util.TimerThread.mainLoop(Timer.java:552)
    at java.util.TimerThread.run(Timer.java:505)

   Locked ownable synchronizers:
    - None
 
 堆栈信息没有指出哪个java类创建了线程，我的问题是如何找出谁是从很多webapps创建线程的。 
 
 谢谢！ 

in tomcat,if a webapp did stop a none daemon thread,tomcat can not be shutdown by shutdown.sh
 
for example:
 
public class demo implements ServletContextListener{

  public void contextDestroyed(ServletContextEvent arg0) {
    // TODO Auto-generated method stub
    // yes,we can cancel timer in here,but this is not the major problem
   }

  public void contextInitialized(ServletContextEvent arg0) {        
    Timer timer = new Timer();
    timer.schedule(new Test(), 1000, 1000*10);
    }
}

public class Test extends TimerTask{  
@Override
public void run() {
    System.out.println("AAAA");        
   }
}
 
like as above,tomcat can not be shutdown by shutdown.sh. from jvisualvm,threads inspector say:
 
"Timer-0" - Thread t@40
   java.lang.Thread.State: TIMED_WAITING
    at java.lang.Object.wait(Native Method)
    - waiting on <3957edeb> (a java.util.TaskQueue)
    at java.util.TimerThread.mainLoop(Timer.java:552)
    at java.util.TimerThread.run(Timer.java:505)

   Locked ownable synchronizers:
    - None
 
stack info did not point out which java class created the thread, my question is how to find out who created the thread from many webapps.
 
Thanks!

原文：https://stackoverflow.com/questions/18999444