ScheduledThreadPoolExecutor with corePoolSize = 0 会导致一个 CPU 内核上的 100% 负载

给定的是一个 ScheduledThreadPoolExecutor 的以下配置，该配置每五秒运行一个简单任务：

int corePoolSize = 0;
ScheduledExecutorService executor = new ScheduledThreadPoolExecutor(corePoolSize);

Runnable task = () -> System.out.println("XXX");
executor.scheduleAtFixedRate(task, 5, 5, TimeUnit.SECONDS);

在Oracle JRE上，有一个由 创建的线程，该线程不断在一个CPU内核上造成100%的负载。调查线程转储会显示以下堆栈跟踪：1.8.0_66ScheduledThreadPoolExecutor

"pool-1-thread-1" - Thread t@10
   java.lang.Thread.State: RUNNABLE
    at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.poll(ScheduledThreadPoolExecutor.java:809)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1066)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

池中仍然有一个线程。但是，线程基本上始终处于状态，因此处于空闲状态。corePoolSize = 1TIMED_WAITING

具有已知功能的行为是未经验证的错误配置还是错误？ScheduledThreadPoolExecutorcorePoolSize = 0