diff --git a/internal/net/grpc/pool/pool.go b/internal/net/grpc/pool/pool.go
index f11bbfa5d6..37df322205 100644
--- a/internal/net/grpc/pool/pool.go
+++ b/internal/net/grpc/pool/pool.go
@@ -371,7 +371,7 @@ func (p *pool) Get() (*ClientConn, bool) {
 		return nil, false
 	}
 
-	for i := 0; i < int(l)+1; i++ {
+	for i := 0; i < int(l); i++ {
 		if res := p.pool[atomic.AddUint64(&p.current, 1)%p.Len()].Load(); res != nil {
 			if pc, ok := res.(*poolConn); ok && pc != nil && isHealthy(pc.conn) {
 				return pc.conn, true