diff --git a/src/job_manager.go b/src/job_manager.go
index e82cc62..dfe31de 100644
--- a/src/job_manager.go
+++ b/src/job_manager.go
@@ -65,6 +65,9 @@ func (jm *JobManager) start() {
 				i = -1
 				start = time.Now().Unix()
 			}
+			if i == -1 {
+				break
+			}
 			time.Sleep(time.Second * 1)
 		}
 		if len(resource.Status) > 0 {
diff --git a/src/optimizer.go b/src/optimizer.go
index 88fd70c..24df2db 100644
--- a/src/optimizer.go
+++ b/src/optimizer.go
@@ -214,7 +214,6 @@ func (optimizer *Optimizer) predict(job string, seq int) (OptimizerJobExecutionT
 
 	var res MsgOptimizerPredict
 	err = json.Unmarshal([]byte(string(body)), &res)
-	log.Println(res)
 	if err == nil {
 		return OptimizerJobExecutionTime{Total: res.Total, Pre: res.Pre, Main: res.Main, Post: res.Post}, true
 	}