scheduleReplication(ctx, objInfo, objectAPI, dsc, replication.ObjectReplicationType)
	}

	setPutObjHeaders(w, objInfo, false)
	// We must not use the http.Header().Set method here because some (broken)
	// clients expect the x-amz-copy-source-version-id header key to be literally
	// "x-amz-copy-source-version-id"- not in canonicalized form, preserve it.
	if srcOpts.VersionID != "" {

// Supports following actions:
// - restart (restarts all the MinIO instances in a setup)
// - stop (stops all the MinIO instances in a setup)
// - freeze (freezes all incoming S3 API calls)
// - unfreeze (unfreezes previously frozen S3 API calls)
func (a adminAPIHandlers) ServiceHandler(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()

	vars := mux.Vars(r)
	action := vars["action"]

	var serviceSig serviceSignal

		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

	etag := getDecryptedETag(formValues, objInfo, false)

	// We must not use the http.Header().Set method here because some (broken)
	// clients expect the ETag header key to be literally "ETag" - not "Etag" (case-sensitive).
	// Therefore, we have to set the ETag directly as map entry.
	w.Header()[xhttp.ETag] = []string{`"` + etag + `"`}

		if r.Header.Get(globalObjectPerfUserMetadata) == "" {
			if val := globalServiceFreeze.Load(); val != nil {
				if unlock, ok := val.(chan struct{}); ok && unlock != nil {
					// Wait until unfrozen.
					select {
					case <-unlock:
					case <-r.Context().Done():
						// if client canceled we don't need to wait here forever.
						return
					}
				}
			}
		}