Is there a way to inadvertently stop the threads of an Executor?

I tried crashing the Thread of a fixed thread pool of a standard ExecutorService with this horrible code, in order to test its resilience against exceptions and errors happening inside the tasks passed to the ExecutorService:

    ExecutorService executorService = Executors.newFixedThreadPool(1);
    executorService.execute(() -> {
        throw new RuntimeException("Trying to kill the thread");
    executorService.execute(() -> {
        System.out.println("still executing");

but the second task prints still executing so I think the exception is being caught or the Thread instance is restarted anyway. What is happening? Can I trust that no matter what happens inside a task (less than System.exit()) other submitted tasks will continue to be executed by the pool?


Your executor service uses a thread pool. If a thread is killed, one another will be instantiated to execute next task.

Your call Executors.newFixedThreadPool(1); set a limit on number of active threads only.

In order to stop executor service, you must call:


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