for (int i = numberOfThreads; i > 0; i--) {
      @SuppressWarnings("unused") // https://errorprone.info/bugpattern/FutureReturnValueIgnored
      Future<?> possiblyIgnoredError =
          executorService.submit(
              new Callable<@Nullable Void>() {
                @Override
                public @Nullable Void call() throws Exception {
                  startLatch.countDown();
                  startLatch.await();

    assertFalse(future.isDone());
    assertFalse(future.isCancelled());

    ExecutorService executor = newSingleThreadExecutor();

    try {
      Future<Boolean> getResult = executor.submit(() -> future.get());

      // Release the future value.
      latch.countDown();

      assertTrue(getResult.get(10, SECONDS));
    } finally {
      executor.shutdownNow();
    }

        // When generating nonces concurrently
        ExecutorService executor = Executors.newFixedThreadPool(threadCount);
        for (int t = 0; t < threadCount; t++) {
            executor.submit(() -> {
                try {
                    for (int i = 0; i < noncesPerThread; i++) {
                        byte[] nonce = context.generateNonce();
                        String nonceStr = Arrays.toString(nonce);

                                        <la:message key="labels.crud_button_back"/>
                                    </la:link>
                                    <button type="submit" class="btn btn-success" name="create"
                                            value="<la:message key="labels.crud_button_create" />">
                                        <i class="fa fa-plus" aria-hidden="true"></i>

```
cd /usr/hdp/current/spark2-client
su spark
```

- Run the Apache Spark Pi job in yarn-client mode, using code from **org.apache.spark**:

```
./bin/spark-submit --class org.apache.spark.examples.SparkPi \
    --master yarn-client \
    --num-executors 1 \
    --driver-memory 512m \
    --executor-memory 512m \
    --executor-cores 1 \

    return new NoOpScheduledExecutorService();
  }

  /**
   * Creates a scheduled executor service that runs each task in the thread that invokes {@code
   * execute/submit/schedule}, as in {@link CallerRunsPolicy}. This applies both to individually
   * submitted tasks and to collections of tasks submitted via {@code invokeAll}, {@code invokeAny},

        By asking questions in a structured way (following this) it will be much easier to help you.

        And there's a high chance that you will find the solution along the way and you won't even have to submit it and wait for an answer. 😎

errors.app.db.already.updated = Mogelijk is het al bijgewerkt door een ander proces. Probeer de bewerking opnieuw.
errors.app.db.already.exists = Gegevens bestaan al. Probeer de bewerking opnieuw.
errors.app.double.submit.request = Dit verzoek is mogelijk al verwerkt. Probeer de bewerking opnieuw.
# _/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
# you can define your messages here:
# e.g.

errors.app.db.already.updated = Возможно, он был обновлен другим процессом. Пожалуйста, попробуйте еще раз.
errors.app.db.already.exists = Данные уже существуют. Пожалуйста, попробуйте еще раз.
errors.app.double.submit.request = Возможно, он был обработан до этого запроса. Пожалуйста, попробуйте еще раз.
# _/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
# you can define your messages here:
# e.g.

        final CountDownLatch endLatch = new CountDownLatch(threadCount);

        ExecutorService executor = Executors.newFixedThreadPool(threadCount);

        for (int i = 0; i < threadCount; i++) {
            executor.submit(new Runnable() {
                @Override
                public void run() {
                    try {
                        startLatch.await();
                        for (int j = 0; j < operationsPerThread; j++) {