测试程序：

import java.util.concurrent.CountDownLatch;

public class TestNativeOutOfMemoryError {

 public static void main(String[] args) {

  for (int i = 0;; i++) {

   System.out.println("i = " + i);

   new Thread(new HoldThread()).start();

  }

 }

}

class HoldThread extends Thread {

 CountDownLatch cdl = new CountDownLatch(1);

 public HoldThread() {

  this.setDaemon(true);

 }

 public void run() {

  try {

   cdl.await();

  } catch (InterruptedException e) {

  }

 }

}

不指定任何JVM参数，eclipse中直接运行输出，看到了这位朋友了吧：

i = 5602

Exception in thread "main" java.lang.OutOfMemoryError: unable to create new native thread

    at java.lang.Thread.start0(Native Method)

    at java.lang.Thread.start(Thread.java:597)

    at TestNativeOutOfMemoryError.main(TestNativeOutOfMemoryError.java:20)