diff --git a/pool/connection_manager.go b/pool/connection_manager.go
index 5b9a08de..b142529a 100644
--- a/pool/connection_manager.go
+++ b/pool/connection_manager.go
@@ -297,7 +297,6 @@ func (cm connectionManager) Statistic() Statistic {
 	stat := Statistic{}
 	for _, inner := range cm.innerPools {
 		nodes := make([]string, 0, len(inner.clients))
-		inner.lock.RLock()
 		for _, cl := range inner.clients {
 			if cl.isHealthy() {
 				nodes = append(nodes, cl.address())
@@ -311,7 +310,6 @@ func (cm connectionManager) Statistic() Statistic {
 			stat.nodes = append(stat.nodes, node)
 			stat.overallErrors += node.overallErrors
 		}
-		inner.lock.RUnlock()
 		if len(stat.currentNodes) == 0 {
 			stat.currentNodes = nodes
 		}