// 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);

    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();
    }

```
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 \

      $searchButton = $("#searchButton"),
      contextPath = $("#contextPath").val(),
      loadImage,
      IMG_LOADING_DELAY = 200,
      IMG_LOADING_MAX = 0,
      clipboard;

  $("#searchForm").on("submit", function(e) {
    $searchButton.attr("disabled", true);
    setTimeout(function() {
      $searchButton.attr("disabled", false);
    }, 3000);
    return true;
  });

                                        <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" />">
                                        <em class="fa fa-plus">

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.

 *       captured by any of the steps in the pipeline are closed.
 * </ol>
 *
 * <h3>Starting a pipeline</h3>
 *
 * Start a {@code ClosingFuture} pipeline {@linkplain #submit(ClosingCallable, Executor) from a
 * callable block} that may capture objects for later closing. To start a pipeline from a {@link
 * ListenableFuture} that doesn't create resources that should be closed later, you can use {@link

        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++) {

errors.app.db.already.updated = Potrebbe essere stato aggiornato da un altro processo. Riprova l'operazione.
errors.app.db.already.exists = I dati esistono già. Riprova l'operazione.
errors.app.double.submit.request = Questa richiesta potrebbe essere già stata elaborata. Riprova l'operazione.
# _/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
# you can define your messages here:
# e.g.