diff --git a/src/job_manager.go b/src/job_manager.go
index 5238694..5e65d75 100644
--- a/src/job_manager.go
+++ b/src/job_manager.go
@@ -197,9 +197,11 @@ func (jm *JobManager) checkStatus(status []TaskStatus) {
 				jm.scheduler.UpdateProgress(jm.job, Failed)
 			}
 
-			jm.scheduler.ReleaseResource(jm.job, jm.resources[i])
-			log.Info("return resource ", jm.resources[i].ClientID)
-			jm.resources[i].ClientID = "_released_"
+			if jm.resources[i].ClientID != "_released_" {
+				jm.scheduler.ReleaseResource(jm.job, jm.resources[i])
+				log.Info("return resource ", jm.resources[i].ClientID)
+				jm.resources[i].ClientID = "_released_"
+			}
 
 			for _, t := range jm.resources[i].Status {
 				InstanceOfResourcePool().detach(t.UUID, jm.job)
diff --git a/src/scheduler_fair.go b/src/scheduler_fair.go
index 942ee75..ce212c4 100644
--- a/src/scheduler_fair.go
+++ b/src/scheduler_fair.go
@@ -277,6 +277,9 @@ func (scheduler *SchedulerFair) AcquireResource(job Job) []NodeStatus {
 
 		}(res)
 	}
+	go func() {
+		scheduler.UpdateQuota()
+	}()
 	return res
 }
 
@@ -296,7 +299,9 @@ func (scheduler *SchedulerFair) ReleaseResource(job Job, agent NodeStatus) {
 		}
 		scheduler.resourceAllocationsMu.Unlock()
 	}(agent)
-	scheduler.UpdateQuota()
+	go func() {
+		scheduler.UpdateQuota()
+	}()
 }
 
 /* allocate quota to queues */