Deadlocked.java

public void start() {
        final ExecutorService left = Executors.newSingleThreadExecutor(new NamedThreadFactory("Left", true));
        final Object leftObject = new Object();
        final ExecutorService right = Executors.newSingleThreadExecutor(new NamedThreadFactory("Right", false));
        final Object rightObject = new Object();

        left.execute(() -> {
            while (true) {
                synchronized (leftObject) {
                    ThreadUtils.sleepWithoutInterruption(3000L, TimeUnit.MILLISECONDS);
                    log.info("Got left object, trying to acquire right now");
                    synchronized (rightObject) {
                        log.info("Got right object");
                        throw new RuntimeException("Shouldn't get both objects");
                    }
                }
            }
        });

        right.execute(() -> {
            while (true) {
                synchronized (rightObject) {
                    ThreadUtils.sleepWithoutInterruption(3000L, TimeUnit.MILLISECONDS);
                    log.info("Got right object, trying to acquire left now");
                    synchronized (leftObject) {
                        log.info("Got left object");
                        throw new RuntimeException("Shouldn't get both objects");
                    }
                }
            }
        });

        try {
            Thread.currentThread().join();
        } catch (final InterruptedException e) {
        }
    }