Fix the bug that healthy sentinel displays ERROR on the codis-fe

pkg/utils/redis/client.go

@@ -30,6 +30,10 @@ type Client struct {
 	Pipeline struct {
 		Send, Recv uint64
 	}
+
+	ExecCmd struct {
+		Do, Done uint64
+	}
 }
 
 func NewClientNoAuth(addr string, timeout time.Duration) (*Client, error) {
@@ -61,14 +65,18 @@ func (c *Client) isRecyclable() bool {
 		return false
 	case c.Pipeline.Send != c.Pipeline.Recv:
 		return false
+	case c.ExecCmd.Do != c.ExecCmd.Done:
+		return false
 	case c.Timeout != 0 && c.Timeout <= time.Since(c.LastUse):
 		return false
 	}
 	return true
 }
 
 func (c *Client) Do(cmd string, args ...interface{}) (interface{}, error) {
+	c.ExecCmd.Do++
 	r, err := c.conn.Do(cmd, args...)
+	c.ExecCmd.Done++
 	if err != nil {
 		c.Close()
 		return nil, errors.Trace(err)