Wenn ein Client versucht, einige **zusätzliche Header** zu senden, erhält er eine **Error-<abbr title="Response – Antwort: Daten, die der Server zum anfragenden Client zurücksendet">Response</abbr>**.

Zum Beispiel, wenn der Client versucht, einen `tool`-Header mit einem Wert von `plumbus` zu senden, erhält er eine **Error-Response**, die ihm mitteilt, dass der Header-Parameter `tool` nicht erlaubt ist:

```json

Zum Beispiel stellt eine der Möglichkeiten, die OAuth2-Spezifikation zu verwenden (genannt „password flow“), die Bedingung, einen `username` und ein `password` als Formularfelder zu senden.

Die <dfn title="Spezifikation">Spezifikation</dfn> erfordert, dass die Felder exakt `username` und `password` genannt werden und als Formularfelder, nicht JSON, gesendet werden.

		lookupHost = net.DefaultResolver.LookupHost
	}

	if baseDialCtx == nil {
		// This is same as which `http.DefaultTransport` uses.
		baseDialCtx = (&net.Dialer{
			Timeout:   30 * time.Second,
			KeepAlive: 30 * time.Second,
		}).DialContext
	}

	return func(ctx context.Context, network, addr string) (conn net.Conn, err error) {
		host, port, err := net.SplitHostPort(addr)
		if err != nil {
			return nil, err
		}

import static java.util.concurrent.Executors.newFixedThreadPool;
import static java.util.concurrent.TimeUnit.MILLISECONDS;
import static java.util.concurrent.TimeUnit.NANOSECONDS;
import static java.util.concurrent.TimeUnit.SECONDS;

import com.google.common.annotations.GwtCompatible;
import com.google.common.annotations.GwtIncompatible;
import java.time.Duration;
import java.util.concurrent.Callable;
import java.util.concurrent.CountDownLatch;

	usageVersionCountDistribution = "version_count_distribution"
)

var (
	usageSinceLastUpdateSecondsMD = NewGaugeMD(usageSinceLastUpdateSeconds,
		"Time since last update of usage metrics in seconds")
	usageTotalBytesMD = NewGaugeMD(usageTotalBytes,
		"Total cluster usage in bytes")
	usageObjectsCountMD = NewGaugeMD(usageObjectsCount,
		"Total cluster objects count")
	usageVersionsCountMD = NewGaugeMD(usageVersionsCount,

   * concurrent maps whose content may change while the method is running.
   *
   * <p>The serialized output consists of the number of entries, first key, first value, second key,
   * second value, and so on.
   */
  static <K extends @Nullable Object, V extends @Nullable Object> void writeMap(
      Map<K, V> map, ObjectOutputStream stream) throws IOException {
    stream.writeInt(map.size());

        assertEquals("foo/", r1.getName(), "First child name should match with trailing slash");

        assertTrue(it.hasNext(), "Expected second element available");
        SmbResource r2 = it.next();
        assertNotNull(r2);
        assertEquals("bar/", r2.getName(), "Second child name should match with trailing slash");

        // End of iteration behavior
        assertFalse(it.hasNext(), "No more elements expected");

    /**
     * Seconds between January 1, 1904 and January 1, 1970 (Mac epoch).
     */
    public static final long SEC_BETWEEEN_1904_AND_1970 = 2082844800L;

    /**
     * Time encoding type: 1970 epoch, 32-bit seconds, big-endian.
     */
    public static final int TIME_1970_SEC_32BE = 1;

    /**
     * Time encoding type: 1970 epoch, 32-bit seconds, little-endian.
     */

// ExtractFunc represents EXTRACT sql function
type ExtractFunc struct {
	Timeword string       `parser:" \"EXTRACT\" \"(\" @( \"YEAR\":Timeword | \"MONTH\":Timeword | \"DAY\":Timeword | \"HOUR\":Timeword | \"MINUTE\":Timeword | \"SECOND\":Timeword | \"TIMEZONE_HOUR\":Timeword | \"TIMEZONE_MINUTE\":Timeword ) "`
	From     *PrimaryTerm `parser:" \"FROM\" @@ \")\" "`
}

// TrimFunc represents TRIM sql function
type TrimFunc struct {

  private void assertNoExpectedFailures() {
    assertWithMessage("executor was shut down")
        .that(shutdownAndAwaitTermination(executor, 10, SECONDS))
        .isTrue();
    assertWithMessage("closingExecutor was shut down")
        .that(shutdownAndAwaitTermination(closingExecutor, 10, SECONDS))
        .isTrue();
    if (!failures.isEmpty()) {
      StringWriter message = new StringWriter();