if unit > time.Hour {
		// Protect against integer overflow
		panic("unit cannot exceed one hour")
	}
	return func(r *rand.Rand, attempt uint) time.Duration {
		sleep := min
		sleep += unit * time.Duration(attempt)
		if sleep > cap {
			sleep = cap
		}
		sleep -= time.Duration(r.Float64() * float64(sleep))
		return sleep
	}

var KafkaSHA512 scram.HashGeneratorFcn = sha512.New

// XDGSCRAMClient implements the client-side of an authentication
// conversation with a server.  A new conversation must be created for
// each authentication attempt.
type XDGSCRAMClient struct {
	*scram.Client
	*scram.ClientConversation
	scram.HashGeneratorFcn
}

// Begin constructs a SCRAM client component based on a given hash.Hash

		// to attempt a heal on the object.
		if countErrs(errs, errDiskNotFound) > 0 {
			return
		}

		var missingBlocks int
		for i := range errs {
			if IsErr(errs[i],
				errFileNotFound,
				errFileVersionNotFound,
				errFileCorrupt,
			) {
				missingBlocks++
			}
		}

		// if missing metadata can be reconstructed, attempt to reconstruct.

		// Protect against integer overflow
		panic("unit cannot exceed one hour")
	}
	return func(attempt uint) time.Duration {
		if attempt > 16 {
			// Protect against integer overflow
			attempt = 16
		}
		// sleep = random_between(unit, min(cap, base * 2 ** attempt))
		sleep := unit * time.Duration(1<<attempt)
		if sleep > cap {
			sleep = cap
		}
		sleep -= time.Duration(r.Float64() * float64(sleep-unit))

	response, err = s.client.Do(request)
	c.Assert(err, nil)
	// Assert the response status code.
	c.Assert(response.StatusCode, http.StatusNoContent)
}

// TestDeleteBucketNotEmpty - Validates the operation during an attempt to delete a non-empty bucket.
func (s *TestSuiteCommon) TestDeleteBucketNotEmpty(c *check) {
	// generate a random bucket name.
	bucketName := getRandomBucketName()

	// HTTP request to create the bucket.

	})

	// initialize the object layer.
	defer setObjectLayer(z)

	r := rand.New(rand.NewSource(time.Now().UnixNano()))
	attempt := 1
	for {
		var err error
		bootstrapTrace(fmt.Sprintf("poolMeta.Init: loading pool metadata, attempt: %d", attempt), func() {
			err = z.Init(ctx) // Initializes all pools.
		})
		if err != nil {
			if !configRetriableErrors(err) {

					errStr = fmt.Sprintf("no results for downloads upon first attempt, concurrency %d and duration %s", opts.concurrencyStart, opts.duration)
				}

				// if the default concurrency yields zero results, throw an error.
				if throughputHighestResults[i].Uploads == 0 && opts.concurrencyStart == concurrency {
					errStr = fmt.Sprintf("no results for uploads upon first attempt, concurrency %d and duration %s", opts.concurrencyStart, opts.duration)

			// initialization.

			// Generate role ARN as combination of provider domain and
			// prefix of client ID.
			domain := configURLDomain
			if domain == "" {
				// Attempt to parse the JWKs URI.
				domain = p.JWKS.URL.Hostname()
				if domain == "" {
					return c, config.Errorf("unable to parse a domain from the OpenID config")
				}
			}
			if p.ClientID == "" {

	},
	ErrCastFailed: {
		Code:           "CastFailed",
		Description:    "Attempt to convert from one data type to another using CAST failed in the SQL expression.",
		HTTPStatusCode: http.StatusBadRequest,
	},
	ErrInvalidCast: {
		Code:           "InvalidCast",
		Description:    "Attempt to convert from one data type to another using CAST failed in the SQL expression.",

const (
	opLt    = "<"
	opLte   = "<="
	opGt    = ">"
	opGte   = ">="
	opEq    = "="
	opIneq  = "!="
	opIs    = "IS"
	opIsNot = "ISNOT"
)

// InferBytesType will attempt to infer the data type of bytes.
// Will fail if value type is not bytes or it would result in invalid utf8.
// ORDER: int, float, bool, JSON (object or array), timestamp, string