private int queueSize(ContainerThreadpoolConfig config, int maxThreads) {
        return config.queueSize() >= 0 ? config.queueSize() : Math.max(MIN_QUEUE_SIZE, Math.abs(config.queueSize()) * maxThreads);
    }
Shutdown the thread pool, give a grace period of 1 second before forcibly
shutting down all worker threads.
container-core/src/main/java/com/yahoo/container/handler/threadpool/ContainerThreadpoolImpl.java