ThreadPoolExecutor拒绝错误

Question

跟随错误的含义是什么？我怎么才能找回它？

Exception in thread "UserActionProcessor-8811" java.util.concurrent.RejectedExecutionException: Task java.util.concurrent.FutureTask@56624074 rejected from java.util.concurrent.ThreadPoolExecutor@5fd03556[Running, pool size = 300, active threads = 300, queued tasks = 2000, completed tasks = 7979]
        at java.util.concurrent.ThreadPoolExecutor$AbortPolicy.rejectedExecution(ThreadPoolExecutor.java:2048)
        at java.util.concurrent.ThreadPoolExecutor.reject(ThreadPoolExecutor.java:821)
        at java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1372)
        at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:110)

Answer 1

这意味着线程池很忙，队列也是满的。然后，任务被拒绝。我认为如果你不希望任何任务被拒绝，你应该执行拒绝政策。

Answer 2

您超过了并行运行的最大任务数(300)和等待开始执行的任务的最大数量(2000)。您的执行服务无法处理那么多任务或提交的任务太费时。