test/jdk/java/beans/beancontext/BeanContextSupport/NotificationDeadlock.java

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import java.beans.PropertyChangeEvent;
import java.beans.PropertyVetoException;
import java.beans.beancontext.BeanContextSupport;
import java.util.concurrent.TimeUnit;

/**
 * @test
 * @bug 8238170
 * @summary Test for a possible deadlock in the BeanContextSupport
 */
public final class NotificationDeadlock {

    private static volatile long endtime;

    public static void main(String[] args) throws Exception {
        // Will run the test no more than 5 seconds
        endtime = System.nanoTime() + TimeUnit.SECONDS.toNanos(5);

        BeanContextSupport bcs = new BeanContextSupport();
        Thread add = new Thread(() -> {
            while (!isComplete()) {
                bcs.add(bcs);
            }
        });
        Thread remove = new Thread(() -> {
            while (!isComplete()) {
                Object[] objects = bcs.toArray();
                for (Object object : objects) {
                    bcs.remove(object);
                }
            }
        });
        Thread props = new Thread(() -> {
            while (!isComplete()) {
                Object[] objects = bcs.toArray();
                for (Object object : objects) {
                    PropertyChangeEvent beanContext = new PropertyChangeEvent(
                            object, "beanContext", object, null);
                    try {
                        bcs.vetoableChange(beanContext);
                    } catch (PropertyVetoException ignore) {
                    }
                    bcs.propertyChange(beanContext);
                }
            }
        });
        add.start();
        remove.start();
        props.start();
        add.join();
        remove.join();
        props.join();
    }

    private static boolean isComplete() {
        return endtime - System.nanoTime() < 0;
    }
}