remove threads, fix backoff

Author: asm582

Diff for: pkg/controller/queuejob/queuejob_controller_ex.go

@@ -466,7 +466,7 @@ func (qjm *XController) PreemptQueueJobs() {
 			// Only back-off AWs that are in state running and not in state Failed
 			if updateNewJob.Status.State != arbv1.AppWrapperStateFailed {
 				klog.Infof("[PreemptQueueJobs] Adding preempted AppWrapper %s/%s to back off queue.", aw.Name, aw.Namespace)
-				go qjm.backoff(ctx, updateNewJob, "PreemptionTriggered", string(message))
+				qjm.backoff(ctx, updateNewJob, "PreemptionTriggered", string(message))
 			}
 		}
 	}
@@ -1155,7 +1155,7 @@ func (qjm *XController) ScheduleNext(qj *arbv1.AppWrapper) {
 			} else {
 				dispatchFailedMessage = "Cannot find an cluster with enough resources to dispatch AppWrapper."
 				klog.V(2).Infof("[ScheduleNex] [Dispatcher Mode] %s %s\n", dispatchFailedReason, dispatchFailedMessage)
-				go qjm.backoff(ctx, qj, dispatchFailedReason, dispatchFailedMessage)
+				qjm.backoff(ctx, qj, dispatchFailedReason, dispatchFailedMessage)
 			}
 		} else { // Agent Mode
 			aggqj := qjm.GetAggregatedResources(qj)
@@ -1284,7 +1284,7 @@ func (qjm *XController) ScheduleNext(qj *arbv1.AppWrapper) {
 						// TODO: Remove forwarded logic as a big AW will never be forwarded
 						forwarded = true
 						// should we call backoff or update etcd?
-						go qjm.backoff(ctx, qj, dispatchFailedReason, dispatchFailedMessage)
+						qjm.backoff(ctx, qj, dispatchFailedReason, dispatchFailedMessage)
 					}
 				}
 				forwarded = true
@@ -1347,7 +1347,7 @@ func (qjm *XController) ScheduleNext(qj *arbv1.AppWrapper) {
 				if qjm.quotaManager != nil && quotaFits {
 					qjm.quotaManager.Release(qj)
 				}
-				go qjm.backoff(ctx, qj, dispatchFailedReason, dispatchFailedMessage)
+				qjm.backoff(ctx, qj, dispatchFailedReason, dispatchFailedMessage)
 			}
 		}
 		return nil
@@ -1672,6 +1672,20 @@ func (cc *XController) updateQueueJob(oldObj, newObj interface{}) {
 	}
 
 	klog.V(6).Infof("[Informer-updateQJ] '%s/%s' *Delay=%.6f seconds normal enqueue Version=%s Status=%v", newQJ.Namespace, newQJ.Name, time.Now().Sub(newQJ.Status.ControllerFirstTimestamp.Time).Seconds(), newQJ.ResourceVersion, newQJ.Status)
+	for _, cond := range newQJ.Status.Conditions {
+		if cond.Type == arbv1.AppWrapperCondBackoff {
+			//AWs that have backoff conditions have a delay of 10 seconds before getting added to enqueue.
+			//TODO: we could plug an interface here with back-off strategies for different MCAD use cases.
+			time.AfterFunc(time.Duration(cc.serverOption.BackoffTime)*time.Second, func() {
+				if cc.serverOption.QuotaEnabled && cc.quotaManager != nil {
+					cc.quotaManager.Release(newQJ)
+				}
+				cc.enqueue(newQJ)
+			})
+			return
+		}
+	}
+
 	// cc.eventQueue.Delete(oldObj)
 	cc.enqueue(newQJ)
 }