我们是否需要关闭 ExecutorService fixedThreadPool

Question

我在我的应用程序中使用 ExecutorService 创建了线程池，使用以下代码调用供应商 websrvice。

  ExecutorService executor = Executors.newFixedThreadPool(getThreadPoolSize());
    for (int i = 0; i < list.size(); i++) {
                    Request ecpReq = list.get(i);           
                    thRespLst.add(executor.submit(new Task(ecpReq)));
                }

想知道我们是否需要关闭线程池或其他东西，基本上我不想在生产环境中挂起线程。

Answer 1

newFixedThreadPool

public static ExecutorService newFixedThreadPool(int nThreads)

Creates a thread pool that reuses a fixed number of threads operating off a shared unbounded queue. At any point, at most nThreads threads will be active processing tasks. If additional tasks are submitted when all threads are active, they will wait in the queue until a thread is available. If any thread terminates due to a failure during execution prior to shutdown, a new one will take its place if needed to execute subsequent tasks. The threads in the pool will exist until it is explicitly shutdown.

Javadocs.

Here很好的解释。

Answer 2

FinalizableDelegatedExecutorService 和 ThreadPoolExecutor 覆盖 finalize() 以执行关机。

/**
* Invokes {@code shutdown} when this executor is no longer
* referenced and it has no threads.
*/
protected void finalize() {
    shutdown();
}

实际上，我认为没有理由明确关闭 ExecutorService。

我们是否需要关闭 ExecutorService fixedThreadPool

Do we need to shutdown ExecutorService fixedThreadPool

java

executorservice

threadpoolexecutor