fix bug

server/worker.go

@@ -30,26 +30,28 @@ type Worker struct {
 
 func PopWorker(rdb *redis.Client) (Worker, error) {
 	for i := 0; i < maxPriority; i++ {
-		elem, err := rdb.LPop(context.Background(), config.WORKER_QUEUE_PREFIX+strconv.Itoa(i)).Result()
-		if err != nil {
-			log.WithError(err).Error("lPop worker failed")
-			continue
-		}
-		log.WithField("elem", elem).Debug("lPop worker")
-		managerList, err := rdb.SMembers(context.Background(), config.WORKER_STATUS_PREFIX+elem).Result()
-		if err != nil {
-			log.WithError(err).Error("get worker status failed")
-			continue
-		}
-		log.WithField("managerList", managerList).Debug("get worker status")
-		if len(managerList) == 0 {
-			continue
+		for {
+			elem, err := rdb.LPop(context.Background(), config.WORKER_QUEUE_PREFIX+strconv.Itoa(i)).Result()
+			if err != nil {
+				log.WithError(err).Error("lPop worker failed")
+				break
+			}
+			log.WithField("elem", elem).Debug("lPop worker")
+			managerList, err := rdb.SMembers(context.Background(), config.WORKER_STATUS_PREFIX+elem).Result()
+			if err != nil {
+				log.WithError(err).Error("get worker status failed")
+				continue
+			}
+			log.WithField("managerList", managerList).Debug("get worker status")
+			if len(managerList) == 0 {
+				continue
+			}
+			return Worker{
+				workerid: elem,
+				priority: i,
+				managers: managerList,
+			}, nil
 		}
-		return Worker{
-			workerid: elem,
-			priority: i,
-			managers: managerList,
-		}, nil
 
 	}
 	return Worker{}, ErrNoWorker