diff --git a/internal/distributed/querycoord/client/client.go b/internal/distributed/querycoord/client/client.go
index cd4aaed0cf..b472a557f3 100644
--- a/internal/distributed/querycoord/client/client.go
+++ b/internal/distributed/querycoord/client/client.go
@@ -225,6 +225,7 @@ func (c *Client) Register() error {
 	return nil
 }
 
+// GetComponentStates gets the component states of QueryCoord.
 func (c *Client) GetComponentStates(ctx context.Context) (*internalpb.ComponentStates, error) {
 	ret, err := c.recall(func() (interface{}, error) {
 		client, err := c.getGrpcClient()