}

        return false;
    }

    /**
     * Deletes an index from the search engine.
     *
     * @param indexName the name of the index to delete
     * @return true if the index was deleted successfully, false otherwise
     */
    public boolean deleteIndex(final String indexName) {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        try {

            if (!requestSemaphore.tryAcquire()) {
                totalBackpressureRejections.incrementAndGet();
                throw new CIFSException("Circuit breaker '" + name + "' rejected request due to backpressure");
            }
        }

        long startTime = System.nanoTime();
        boolean semaphoreAcquired = backpressureEnabled && requestSemaphore != null;

        try {

		// Retry infinitely on Kubernetes and Docker swarm.
		// This is needed as the remote hosts are sometime
		// not available immediately.
		select {
		case <-globalOSSignalCh:
			return fmt.Errorf("The endpoint resolution got interrupted")
		default:
			for i, resolved := range resolvedList {
				if resolved {
					// Continue if host is already resolved.

   * this fluent iterable contains fewer than {@code numberToSkip} elements, the returned fluent
   * iterable skips all of its elements.
   *
   * <p>Modifications to this fluent iterable before a call to {@code iterator()} are reflected in
   * the returned fluent iterable. That is, the iterator skips the first {@code numberToSkip}
   * elements that exist when the iterator is created, not when {@code skip()} is called.
   *

   * this fluent iterable contains fewer than {@code numberToSkip} elements, the returned fluent
   * iterable skips all of its elements.
   *
   * <p>Modifications to this fluent iterable before a call to {@code iterator()} are reflected in
   * the returned fluent iterable. That is, the iterator skips the first {@code numberToSkip}
   * elements that exist when the iterator is created, not when {@code skip()} is called.
   *

}

// checkAdminRequestAuth checks for authentication and authorization for the incoming
// request. It only accepts V2 and V4 requests. Presigned, JWT and anonymous requests
// are automatically rejected.
func checkAdminRequestAuth(ctx context.Context, r *http.Request, action policy.AdminAction, region string) (auth.Credentials, APIErrorCode) {
	cred, owner, s3Err := validateAdminSignature(ctx, r, region)
	if s3Err != ErrNone {

	// down `ch`
	go func() {
		for {
		outerLoop:
			watchCh := ies.client.Watch(ctx,
				keyPath, etcd.WithPrefix(), etcd.WithKeysOnly())

			for {
				select {
				case <-ctx.Done():
					return
				case watchResp, ok := <-watchCh:
					if !ok {
						time.Sleep(1 * time.Second)
						// Upon an error on watch channel
						// re-init the watch channel.

  public void testPartition_view() {
    List<Integer> list = asList(1, 2);
    Iterator<List<Integer>> partitions = Iterators.partition(list.iterator(), 1);

    // Changes before the partition is retrieved are reflected
    list.set(0, 3);
    List<Integer> first = partitions.next();

    // Changes after are not
    list.set(0, 4);

    assertEquals(ImmutableList.of(3), first);
  }

	c.assertSvcAccInfoQueryable(ctx, userAdmClient, value.AccessKeyID, cr.AccessKey, true)

	// 3. Check S3 access
	c.assertSvcAccS3Access(ctx, s, cr, bucket)

	// 5. Check that service account can be deleted.
	c.assertSvcAccDeletion(ctx, s, userAdmClient, value.AccessKeyID, bucket)

	// 6. Check that service account cannot be created for some other user.

     *
     * @param index The index to delete from.
     * @param type The document type (deprecated).
     * @param queryBuilder The query to match documents for deletion.
     * @return The number of deleted documents.
     * @throws OpenSearchAccessException if the deletion fails.
     */
    public int deleteByQuery(final String index, final String type, final QueryBuilder queryBuilder) {
        SearchResponse response =