diff --git a/src/job_manager.go b/src/job_manager.go
index 4fc8fe5..45f01ce 100644
--- a/src/job_manager.go
+++ b/src/job_manager.go
@@ -146,7 +146,7 @@ func (jm *JobManager) start() {
 	/* monitor job execution */
 	for {
 		//jm.status()
-		if !jm.isRunning {
+		if !jm.isRunning || jm.killFlag {
 			break
 		}
 		time.Sleep(time.Second * 1)
diff --git a/src/resource_pool.go b/src/resource_pool.go
index 31ae736..1281495 100644
--- a/src/resource_pool.go
+++ b/src/resource_pool.go
@@ -861,7 +861,7 @@ func (pool *ResourcePool) doAcquireResource(job Job) []NodeStatus {
 	/* third round, find gpu to be released */
 	if len(candidates) == 0 && len(job.Tasks) == 1 && task.NumberGPU == 1 && pool.enablePreSchedule {
 		estimate := InstanceOfOptimizer().PredictTime(job)
-		log.Info(estimate)
+		log.Debug(estimate)
 
 		if loadRatio >= pool.enablePreScheduleRatio {
 			allocationType = 3