Sensor in metrics has potential thread safety issues

@Test
public void testSensorRecordThreadSafety() {
    Time time = new MockTime(0, System.currentTimeMillis(), 0);
    Metrics metrics = new Metrics(time);
    Sensor sensor = metrics.sensor("sensor");
    MetricName metric = new MetricName("test", "test", "test", Collections.emptyMap());
    sensor.add(metric, new Value());

    int totalRequests = 10;
    AtomicInteger count = new AtomicInteger();
    Executor threadPool = Executors.newFixedThreadPool(totalRequests);
    CompletableFuture[] futures = new CompletableFuture[totalRequests];
    for (int i = 0; i < totalRequests; i++) {
        futures[i] = CompletableFuture.runAsync(() -> {
            try {
                Thread.sleep(10); // to make it easier to repro
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }
            sensor.record(count.addAndGet(1));
        }, threadPool);
    }
    CompletableFuture.allOf(futures).join();
    
    assertEquals(1, sensor.metrics().size());
    double value = (double) sensor.metrics().get(0).metricValue();
    assertEquals(totalRequests, value);
}