/// warning | Achtung

Bevor Sie `convert_underscores` auf `False` setzen, bedenken Sie, dass manche HTTP-Proxys und Server die Verwendung von Headern mit Unterstrichen nicht erlauben.

///

## Doppelte Header { #duplicate-headers }

Es ist möglich, doppelte Header zu empfangen. Damit ist gemeint, denselben Header mit mehreren Werten.

Sie können solche Fälle definieren, indem Sie in der Typdeklaration eine Liste verwenden.

    // Note: Not all random access lists support set(). Additionally, it's possible
    // for a list to reject setting an element, such as when the list does not permit
    // duplicate elements. For both of those cases,  we need to fall back to a slower
    // implementation.
    int from = 0;
    int to = 0;

    for (; from < list.size(); from++) {
      T element = list.get(from);

Avant de définir `convert_underscores` sur `False`, gardez à l'esprit que certains proxies et serveurs HTTP interdisent l'utilisation d'en-têtes contenant des traits bas.

///

## Gérer les en-têtes dupliqués { #duplicate-headers }

Il est possible de recevoir des en-têtes en double. Autrement dit, le même en-tête avec plusieurs valeurs.

Vous pouvez définir ces cas à l'aide d'une liste dans la déclaration de type.

      for (int i = 0; i < chars.length; i++) {
        char c = chars[i];
        checkArgument(c < decodabet.length, "Non-ASCII character: %s", c);
        checkArgument(decodabet[c] == -1, "Duplicate character: %s", c);
        decodabet[c] = (byte) i;
      }
      return decodabet;
    }

    /** Returns an equivalent {@code Alphabet} except it ignores case. */
    Alphabet ignoreCase() {

#### Cluster Autoscaling
* Cluster Autoscaler 0.6. More information available [here](https://github.com/kubernetes/autoscaler/blob/master/cluster-autoscaler/README.md).

* cluster-autoscaler: Fix duplicate writing of logs. ([#45017](https://github.com/kubernetes/kubernetes/pull/45017), [@MaciekPytel](https://github.com/MaciekPytel))


#### Cloud Provider Enhancement

* AWS:

* AWS kube-up: Increase timeout waiting for docker start ([#25405](https://github.com/kubernetes/kubernetes/pull/25405), [@justinsb](https://github.com/justinsb))
* Sort resources in quota errors to avoid duplicate events ([#25161](https://github.com/kubernetes/kubernetes/pull/25161), [@derekwaynecarr](https://github.com/derekwaynecarr))

 * elements.
 *
 * <p>The collections created by {@link #createCollection()} may or may not allow duplicates. If the
 * collection, such as a {@link Set}, does not support duplicates, an added key-value pair will
 * replace an existing pair with the same key and value, if such a pair is present. With collections
 * like {@link List} that allow duplicates, the collection will keep the existing key-value pairs
 * while adding a new pair.
 *

more beneficial changes instead.

Please discuss your change in a Github issue before spending much time on its
implementation. We sometimes have to reject contributions that duplicate other
efforts, take the wrong approach to solving a problem, or solve a problem which
does not need solving. An up-front discussion often saves a good deal of wasted
time in these cases.

    TF_EXCLUSIVE_LOCKS_REQUIRED(desc->graph->mu) {
  Node* ret = nullptr;

  if (desc->graph->name_map.count(desc->node_builder.node_name())) {
    status->status = InvalidArgument("Duplicate node name in graph: '",
                                     desc->node_builder.node_name(), "'");
  } else {
    if (!desc->colocation_constraints.empty()) {
      desc->node_builder.Attr(

			expectedParsingErr:    nil,
			expectedValidationErr: nil,
		},
		{ // lifecycle config with rules having duplicate ID