问题描述
看起来你已经打JDK-8129861已经固定在Java中9.它也可以与JDK-8022642。
解决方法
提供以下配置,ScheduledThreadPoolExecutor
每5秒运行一次简单任务:
int corePoolSize = 0;
ScheduledExecutorService executor = new ScheduledThreadPoolExecutor(corePoolSize);
Runnable task = () -> System.out.println("XXX");
executor.scheduleAtFixedRate(task,5,TimeUnit.SECONDS);
在Oracle
JRE上1.8.0_66
,创建了一个线程,该线程ScheduledThreadPoolExecutor
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:
"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)
随着corePoolSize = 1
仍有池中一个线程。但是,线程基本上始终处于状态TIMED_WAITING
,因此处于空闲状态。
是ScheduledThreadPoolExecutor
具有corePoolSize = 0
已知功能,未经验证的错误配置甚至是错误的行为?