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javathreadpooldaemonshutdown

Do ThreadPoolExecutors that create daemon threads require shutdown?

This seemed to happen in my application but was almost certainly the result of something else going on in my Maven / JUnit test case environment (on code I haven't even fully read - maintaining a foreign project). The following code works as desired, and the TPE doesn't require shutdown:

final ScheduledThreadPoolExecutor pool = new ScheduledThreadPoolExecutor(1, new ThreadFactory() {

        @Override
        public Thread newThread(Runnable task) {

            Thread thread = new Thread(task, replenisherThreadName);
            thread.setDaemon(true);
            return thread;
        }
    });
Solution

  • if it is truly a daemon thread, then it is not keeping your application alive. your problem lies elsewhere (or it's not really a daemon thread).