bugfix on ML model refresh during online analysis

package-lock.json

@@ -358,6 +358,7 @@
       "version": "1.0.10",
       "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.10.tgz",
       "integrity": "sha512-o5Roy6tNG4SL/FOkCAN6RzjiakZS25RLYFrcMttJqbdd8BWrnA+fGz57iN5Pb06pvBGvl5gQ0B48dJlslXvoTg==",
+      "dev": true,
       "requires": {
         "sprintf-js": "~1.0.2"
       }
@@ -1744,7 +1745,8 @@
     "esprima": {
       "version": "4.0.1",
       "resolved": "https://registry.npmjs.org/esprima/-/esprima-4.0.1.tgz",
-      "integrity": "sha512-eGuFFw7Upda+g4p+QHvnW0RyTX/SVeJBDM/gCtMARO0cLuT2HcEKnTPvhjV6aGeqrCB/sbNop0Kszm0jsaWU4A=="
+      "integrity": "sha512-eGuFFw7Upda+g4p+QHvnW0RyTX/SVeJBDM/gCtMARO0cLuT2HcEKnTPvhjV6aGeqrCB/sbNop0Kszm0jsaWU4A==",
+      "dev": true
     },
     "event-lite": {
       "version": "0.1.2",
@@ -2775,6 +2777,7 @@
       "version": "3.13.0",
       "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.13.0.tgz",
       "integrity": "sha512-pZZoSxcCYco+DIKBTimr67J6Hy+EYGZDY/HCWC+iAEA9h1ByhMXAIVUXMcMFpOCxQ/xjXmPI2MkDL5HRm5eFrQ==",
+      "dev": true,
       "requires": {
         "argparse": "^1.0.7",
         "esprima": "^4.0.0"
@@ -4668,7 +4671,8 @@
     "sprintf-js": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/sprintf-js/-/sprintf-js-1.0.3.tgz",
-      "integrity": "sha1-BOaSb2YolTVPPdAVIDYzuFcpfiw="
+      "integrity": "sha1-BOaSb2YolTVPPdAVIDYzuFcpfiw=",
+      "dev": true
     },
     "sqlite3": {
       "version": "4.0.6",

predictor.js

@@ -306,8 +306,9 @@ class Predictor {
 		if (this.mlPredictor) {
 			this.decoder.stdout.unpipe(this.mlPredictor);
 			this.mlPredictor.destroy();
+			delete this.mlPredictor;
 		}
-		if (this.config.enablePredictorMl && !this.mlPredictor) {
+		if (this.config.enablePredictorMl) {
 			this.mlPredictor = new MlPredictor({
 				country: this.country,
 				name: this.name,

test/online.js

@@ -178,6 +178,12 @@ if (cluster.isMaster) {
 				}
 			}
 		});
+
+		it("should refresh ML model when requested");
+
+		it("should refresh hotlist db when requested");
+
+		it("should refresh metadata parser when requested");
 	});
 
 } else {