Homestead 下 mariadb 总是自动断开连接？

Homestead下开发项目，浏览器访问时时不时就会提示“SQL拒绝连接“

SQLSTATE[HY000] [2002] Connection refused

Navicat访问时提示：

Lost connection to MySQL server at 'reading initial communication packet', system error: 0 "Internal error/check (Not system error)"

这是我的Homestead配置：

---
ip: "192.168.10.10"
memory: 2048
cpus: 1
provider: virtualbox
mariadb: true

authorize: ~/.ssh/id_rsa.pub

keys:
    - ~/.ssh/id_rsa

folders:
    - map: ~/Codes/php
      to: /home/vagrant/Code

sites:
    - map: task.local.com
      to: /home/vagrant/Code/task/public
    - map: laravel.local.com
      to: /home/vagrant/Code/laravel/public

databases:
    - homestead

# blackfire:
#     - id: foo
#       token: bar
#       client-id: foo
#       client-token: bar

# ports:
#     - send: 50000
#       to: 5000
#     - send: 7777
#       to: 777
#       protocol: udp

项目数据库连接配置：

DB_CONNECTION=mysql
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=task
DB_USERNAME=homestead
DB_PASSWORD=secret

开发环境：

机器：MacBook Pro (Retina, 13-inch, Mid 2014)
操作系统：MacOS Sierra  10.12.3 (16D32)
MariaDB：10.2.4
Homestead版本：2.0.0
Vagrant 版本：1.9.2
IDE：sublime text 3 和 PhpStorm 2016.3

现在基本上已经到了一分钟左右就自动断开的地步，开发时总是需要不停的去Homestead里面启动MariaDB，各位大神，有谁知道是什么原因吗？