java ExecutorService awaitTermination 卡住了
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ExecutorService awaitTermination gets stuck
提问by Kevin
I made a fixed size thread pool with Executors.newFixedThreadPool(2), and I executed 10 Runnableobjects. I set breakpoints and traced through the execution. However, fixedSizeThreadPool.awaitTermination()does not allow me to continue even though all the tasks are done.
我用 制作了一个固定大小的线程池Executors.newFixedThreadPool(2)，并执行了 10 个Runnable对象。我设置了断点并跟踪了整个执行过程。但是，fixedSizeThreadPool.awaitTermination()即使完成了所有任务，也不允许我继续。
Basically:
基本上：
ExecutorService fixedThreadPool = Executors.newFixedThreadPool(2);
for (int i = 0; i < 10; ++i) {
fixedSizeThreadPool.execute(myRunables[i]);
}
try {
fixedSizeThreadPool.awaitTermination(timeout, timeoutUnits);
} catch (Exception e) { }
System.out.println("done!");
But this always gets stuck on awaitTermination. What's wrong?
但这总是卡在awaitTermination. 怎么了？
回答by Paul Bellora
回答by emboss
You could also use ExecutorService#invokeAll. It blocks until all tasks are done or the timeout is reached. It's a little cleaner than using shutdown, if your ExecutorService contains other tasks as well especially scheduled tasks. These would also be affected by a call to shutdown.
您也可以使用ExecutorService#invokeAll。它会阻塞直到所有任务完成或达到超时。shutdown如果您的 ExecutorService 包含其他任务以及特别是计划任务，则它比使用更简洁。这些也会受到调用的影响shutdown。
