Java线程停止没有异常

Question

当我为我的程序使用 4 个线程时通常没有问题，但今天我将它增加到 8 个并且我注意到 1-3 个线程停止工作而没有抛出任何异常。无论如何要找出他们为什么停下来？有没有办法让线程重新启动？

我的线程结构是这样的

public void run()
{
  Main.logger.info(threadName + ": New Thread started (inside run)");
  while (true)
  {
    try
    {
      //all my code
      //all my code
      //all my code
    }
    catch(Exception e)
    {
      Main.logger.error("Exception: " + e);
      try
      {
        Thread.sleep(10000);
      }
      catch (InterruptedException e1)
      {
        e1.printStackTrace();
      }
    }
    finally
    {               
      try
      {
        webClient.closeAllWindows();
        Thread.sleep(3000); 
        Main.logger.info(threadName + ": Closed browser!");
      }
      catch (Exception e)
      {
        Main.logger.error("Exception: " + e);
      }
    }  
  }// end while
}

问候!

Answer 1

请注意 Error 不是 Exception ;这是一个Throwable .
因此，如果您捕获异常，错误 仍会通过:

private void m() {    
    try {
        m(); // recursively calling m() will throw a StackOverflowError
    } catch (Exception e) {
        // this block won't get executed, 
        // because StackOverflowError is not an Exception!
    }
}

要捕获“一切”，请将您的代码更改为:

try {
    ...
} catch (Throwable e) {
   // this block will execute when anything "bad" happens
}

请注意，如果发生错误，您可能无能为力。错误的 javadoc 摘录:

An Error is a subclass of Throwable that indicates serious problems that a reasonable application should not try to catch. Most such errors are abnormal conditions. The ThreadDeath error, though a "normal" condition, is also a subclass of Error because most applications should not try to catch it.