Semaphore missed signals

package multithreading.semaphore.signaling;

public class MySemaphoreSignaling {

    private boolean wasSignal = false;

    public synchronized void acquire() throws InterruptedException {
        while(!wasSignal) wait();
        System.out.println(Thread.currentThread().getName() + " acquire");
    }

    public synchronized void release() {
        notifyAll();
        wasSignal = true;
        System.out.println(Thread.currentThread().getName() + " release");
    }
}


Client:
package multithreading.semaphore.signaling;

public class Client {

    public static void main(String[] args) throws InterruptedException {

        MySemaphoreSignaling semaphore = new MySemaphoreSignaling();
        Thread threadA = new Thread(() -> {semaphore.release();});

        Thread threadB = new Thread(() -> {
            try {
                semaphore.acquire();
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }
        });



        threadA.start();
        threadB.start();
        threadA.join();
        threadB.join();
    }
}