2 clients aquired the same InterProcessLock?

gistfile1.java

import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.CuratorFrameworkFactory;
import org.apache.curator.framework.recipes.locks.InterProcessLock;
import org.apache.curator.framework.recipes.locks.InterProcessMutex;
import org.apache.curator.retry.ExponentialBackoffRetry;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class MutexExample {
    private static String zkServerList = "zookeeper_host:2181";
    private static String zkLockPath = "/sandbox/lock";
    private static ExecutorService executorService = Executors.newFixedThreadPool(100);

    public static void loop(Runnable runnable) {
        for (Integer i = Integer.MIN_VALUE; i < Integer.MAX_VALUE; ++i) {
            if (null != runnable) {
                runnable.run();
            }
        }
    }

    public static void endlessLoop() {
        loop(new Runnable() {
            public void run() {
                loop(new Runnable() {
                    public void run() {
                        loop(new Runnable() {
                            public void run() {
                                loop(new Runnable() {
                                    public void run() {
                                        loop(new Runnable() {
                                            public void run() {
                                                loop(new Runnable() {
                                                    public void run() {
                                                        loop(null);
                                                    }
                                                });
                                            }
                                        });
                                    }
                                });
                            }
                        });
                    }
                });
            }
        });
    }

    public static void main(String[] args) throws InterruptedException {
        final CuratorFramework client = CuratorFrameworkFactory.newClient(
                zkServerList,
                new ExponentialBackoffRetry(1000, 3)
        );
        client.start();
        for (int i = 0; i < 2; ++i) {
            final int clientID = i;
            executorService.submit(new Runnable() {
                public void run() {
                    InterProcessLock lock = new InterProcessMutex(client, zkLockPath);
                    try {
                        System.out.println("Client #" + clientID + " trying to acquire lock");
                        lock.acquire();
                        System.out.println("Client #" + clientID + " lock acquired");
                        endlessLoop();
                        lock.release();
                        System.out.println("Client #" + clientID + " lock released");
                    } catch (Throwable t) {
                        t.printStackTrace();
                    }
                }
            });
        }
    }
}