rng.Shuffle(len(vers), func(i, j int) {
			vers[i], vers[j] = vers[j], vers[i]
		})
		var entries []chan metaCacheEntry
		for _, v := range vers {
			v.cached = nil
			ch := make(chan metaCacheEntry, 1)
			ch <- v
			close(ch)
			entries = append(entries, ch)
		}
		out := make(chan metaCacheEntry, 1)
		err := mergeEntryChannels(context.Background(), entries, out, 1)
		if err != nil {

// items have the pathPrefix removed from their names.
func listIAMConfigItems(ctx context.Context, objAPI ObjectLayer, pathPrefix string) <-chan itemOrErr {
	ch := make(chan itemOrErr)

	go func() {
		defer xioutil.SafeClose(ch)

		// Allocate new results channel to receive ObjectInfo.
		objInfoCh := make(chan ObjectInfo)

		if err := objAPI.Walk(ctx, minioMetaBucket, pathPrefix, objInfoCh, WalkOptions{}); err != nil {
			select {

	if m.QueueDir != "" {
		if !filepath.IsAbs(m.QueueDir) {
			return errors.New("queueDir path should be absolute")
		}
	}

	if m.MaxOpenConnections < 0 {
		return errors.New("maxOpenConnections cannot be less than zero")
	}

	return nil
}

// MySQLTarget - MySQL target.
type MySQLTarget struct {
	initOnce once.Init

	id         event.TargetID
	args       MySQLArgs
	updateStmt *sql.Stmt

	// try lock the unlocked file
	dupl, err := LockedOpenFile(f.Name(), os.O_WRONLY|os.O_CREATE, 0o600)
	if err != nil {
		t.Errorf("err = %v, want %v", err, nil)
	}

	// blocking on locked file
	locked := make(chan struct{}, 1)
	go func() {
		bl, blerr := LockedOpenFile(f.Name(), os.O_WRONLY, 0o600)
		if blerr != nil {
			t.Error(blerr)
			return
		}
		locked <- struct{}{}
		if blerr = bl.Close(); blerr != nil {

//
// Compaction happens when either:
//
// 1) The folder (and subfolders) contains less than dataScannerCompactLeastObject objects.
// 2) The folder itself contains more than dataScannerCompactAtFolders folders.
// 3) The folder only contains objects and no subfolders.
//
// A bucket root will never be compacted.
//
// Furthermore if a has more than dataScannerCompactAtChildren recursive children (uncompacted folders)

		internalLogIf(ctx, errors.New("Callhome: object layer not ready"))
		return
	}

	healthCtx, healthCancel := context.WithTimeout(ctx, deadline)
	defer healthCancel()

	healthInfoCh := make(chan madmin.HealthInfo)

	query := url.Values{}
	for _, k := range madmin.HealthDataTypesList {
		query.Set(string(k), "true")
	}

	healthInfo := madmin.HealthInfo{
		TimeStamp: time.Now().UTC(),

		defer cancel()

		if prefix == "" {
			// if all objects are not deleted yet this call may fail.
			return clnt.RemoveBucket(cctx, bucket)
		}

		objectsCh := make(chan minio.ObjectInfo)

		// Send object names that are needed to be removed to objectsCh
		go func() {
			defer xioutil.SafeClose(objectsCh)
			opts := minio.ListObjectsOptions{
				Prefix:    prefix,

}

// Describe - implements prometheus.Collector interface.
func (mg *MetricsGroup) Describe(ch chan<- *prometheus.Desc) {
	for _, desc := range mg.Descriptors {
		ch <- desc.toPromDesc(mg.CollectorPath.metricPrefix(), mg.ExtraLabels)
	}
}

// Collect - implements prometheus.Collector interface.
func (mg *MetricsGroup) Collect(ch chan<- prometheus.Metric) {
	metricValues := newMetricValues(mg.descriptorMap)

	var err error

	// to authenticate to KMS via mTLS.
	Certificate *certs.Certificate

	// ReloadCertEvents is an event channel that receives
	// the reloaded client certificate.
	ReloadCertEvents <-chan tls.Certificate

	// RootCAs is a set of root CA certificates
	// to verify the KMS server TLS certificate.
	RootCAs *x509.CertPool
}

// NewWithConfig returns a new KMS using the given
// configuration.

	lazyInit lazyInit

	id         event.TargetID
	args       WebhookArgs
	transport  *http.Transport
	httpClient *http.Client
	loggerOnce logger.LogOnce
	cancel     context.CancelFunc
	cancelCh   <-chan struct{}
}

// ID - returns target ID.
func (target *WebhookTarget) ID() event.TargetID {
	return target.id
}

// IsActive - Return true if target is up and active