The below code is working for geographic coordinate system(Both base map and operational layers are in GCS) . But when i switch to Projected coordinate system (both basemap and operational layer) the label is not working but rendering is happening.
The temporal layer i am creating dynamically , not from the mapservice .
Renderer : function (){
 
 var statesColor = new Color("#060606");
 var statesLabel = new TextSymbol().setColor(statesColor);
 statesLabel.font.setSize("14pt");
 statesLabel.font.setFamily("arial"); 
 var json = {
 "labelExpressionInfo": {"value": "{POPULATION}"}
 }; 
 var labelClass = new LabelClass(json);
 labelClass.symbol = statesLabel; 
 this.temporalLayer.setLabelingInfo([ labelClass ]);
 this.map.addLayer(this.temporalLayer);
 smartMapping.createClassedColorRenderer({
 layer: this.temporalLayer,
 field: "POPULATION",
 basemap: "streets",
 classificationMethod: this.checkClassificationType.value,
 numClasses: this.checkClassificationNumber.value
 }).then(lang.hitch(this, function (response) {
 var colorArray = this.interpolateColors("rgb(" + this.fromColor.color.r + "," + this.fromColor.color.g + "," + this.fromColor.color.b +")", "rgb(" + this.toColor.color.r + "," + this.toColor.color.g + "," + this.toColor.color.b + ")", this.checkClassificationNumber.value);
 for (var i = 0; i < colorArray.length ; i++) {
 response.renderer.infos.symbol.color.r = colorArray[0];
 response.renderer.infos.symbol.color.g = colorArray[1];
 response.renderer.infos.symbol.color.b = colorArray[2];
 }
 this.temporalLayer.setRenderer(response.renderer);
 this.temporalLayer.redraw(); 
 }));
 },
 
 interpolateColors : function (color1, color2, steps) {
 var stepFactor = 1 / (steps - 1),
 interpolatedColorArray = [];
color1 = color1.match(/\d+/g).map(Number);
 color2 = color2.match(/\d+/g).map(Number);
for (var i = 0; i < steps; i++) {
 interpolatedColorArray.push(this.interpolateColor(color1, color2, stepFactor * i));
 }
return interpolatedColorArray;
 },
interpolateColor:function (color1, color2, factor) {
 if (arguments.length < 3) {
 factor = 0.5;
 }
 var result = color1.slice();
 for (var i = 0; i < 3; i++) {
 result = Math.round(result + factor * (color2 - color1));
 }
 return result;
 },