Fix: add type for var
diff --git a/cluster/loadbalance/round_robin.go b/cluster/loadbalance/round_robin.go
index e720ab0..ebdd453 100644
--- a/cluster/loadbalance/round_robin.go
+++ b/cluster/loadbalance/round_robin.go
@@ -42,7 +42,7 @@
 
 var (
 	methodWeightMap sync.Map   // [string]invokers
-	state           = COMPLETE // update lock acquired ?
+	state           = int32(COMPLETE) // update lock acquired ?
 	recyclePeriod   = 60 * time.Second.Nanoseconds()
 )