tp5.1 队列报错解决

项目是 tp5.1

队列报下边这个错误

Error while sending STMT_CLOSE packet. PID=10471

网上搜索资料是断线重连的问题，但断线重连是设置的。

引起这个问题的 sql 报错有下边这些

PDO::prepare(): send of 93 bytes failed with errno=110 Connection timed out

think\db\Connection::free(): send of 9 bytes failed with errno=110 Connection timed out

所以想问下此类问题如何解决。

      try {
            // 调试开始
            $this->debug(true);

            // 预处理
            $this->PDOStatement = $this->linkID->prepare($sql);

            // 是否为存储过程调用
            $procedure = in_array(strtolower(substr(trim($sql), 0, 4)), ['call', 'exec']);

            // 参数绑定
            if ($procedure) {
                $this->bindParam($bind);
            } else {
                $this->bindValue($bind);
            }

            // 执行查询
            $this->PDOStatement->execute();

            // 调试结束
            $this->debug(false, '', $master);

            // 返回结果集
            return $this->getResult($pdo, $procedure);
        } catch (\PDOException $e) {
            if ($this->isBreak($e)) {
                return $this->close()->query($sql, $bind, $master, $pdo);
            }

            throw new PDOException($e, $this->config, $this->getLastsql());
        } catch (\Throwable $e) {
            if ($this->isBreak($e)) {
                return $this->close()->query($sql, $bind, $master, $pdo);
            }

            throw $e;
        } catch (\Exception $e) {
            if ($this->isBreak($e)) {
                return $this->close()->query($sql, $bind, $master, $pdo);
            }

            throw $e;
        }