Laravel SQLSTATE[HY000] [2002] 连接被拒绝但修补程序可以工作

【问题标题】：Laravel SQLSTATE[HY000] [2002] Connection refused but tinker worksLaravel SQLSTATE[HY000] [2002] 连接被拒绝但修补程序可以工作
【发布时间】：2019-01-31 19:29:05
【问题描述】：

我有一个使用来自 Amazon 服务器的数据库的生产站点，我在同一台服务器上还有两个站点，并且它们都可以正常连接。

在这个特定的站点上，与 mysql 的连接不起作用，我认为 env 文件丢失或 laravel 应用程序看不到，但当我运行 php artisan tinker 并尝试任何有效的命令时，情况并非如此： 

DB::table('categories')->get();
=> Illuminate\Support\Collection {#842
     all: [
       {#828
         +"id": 1,
         +"parent_id": null,
         +"order": 1,
         +"name": "Noticias",
         +"slug": "noticias",
         +"created_at": "2018-01-09 19:26:32",
         +"updated_at": "2018-01-09 19:26:32",
       },
     ],
   }

App::environment() 方法也可以：

>>> App::environment();
=> "production"

env 文件清楚地写着APP_DEBUG=false，但它返回了很多调试，就像除了工匠之外，webserver 没有读取 env 文件。

这让我发疯，因为它开始自行失败，服务器或代码没有任何更改，这是唯一失败的项目。

我还能检查什么？

[2018-08-25 12:22:04] production.ERROR: SQLSTATE[HY000] [2002] Connection refused {"exception":"[object] (PDOException(code: 2002): SQLSTATE[HY000] [2002] Connection refused at /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Database/Connectors/Connector.php:67)
[stacktrace]
#0 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Database/Connectors/Connector.php(67): PDO->__construct('mysql:host=127....', 'root', 'C4f2469dcF!', Array)
#1 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Database/Connectors/Connector.php(43): Illuminate\\Database\\Connectors\\Connector->createPdoConnection('mysql:host=127....', 'root', 'C4f2469dcF!', Array)
#2 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Database/Connectors/MySqlConnector.php(24): Illuminate\\Database\\Connectors\\Connector->createConnection('mysql:host=127....', Array, Array)
#3 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Database/Connectors/ConnectionFactory.php(183): Illuminate\\Database\\Connectors\\MySqlConnector->connect(Array)
#4 [internal function]: Illuminate\\Database\\Connectors\\ConnectionFactory->Illuminate\\Database\\Connectors\\{closure}()
#5 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Database/Connection.php(915): call_user_func(Object(Closure))
#6 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Database/Connection.php(940): Illuminate\\Database\\Connection->getPdo()
#7 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Database/Connection.php(399): Illuminate\\Database\\Connection->getReadPdo()
#8 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Database/Connection.php(325): Illuminate\\Database\\Connection->getPdoForSelect(true)
#9 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Database/Connection.php(657): Illuminate\\Database\\Connection->Illuminate\\Database\\{closure}('select * from `...', Array)
#10 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Database/Connection.php(624): Illuminate\\Database\\Connection->runQueryCallback('select * from `...', Array, Object(Closure))
#11 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Database/Connection.php(333): Illuminate\\Database\\Connection->run('select * from
`...', Array, Object(Closure))
#12 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Database/Query/Builder.php(1719): Illuminate\\Database\\Connection->select('select
* from `...', Array, true)
#13 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Database/Query/Builder.php(1704): Illuminate\\Database\\Query\\Builder->runSelect()
#14 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Builder.php(483): Illuminate\\Database\\Query\\Builder->get(Array)
#15 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Builder.php(467): Illuminate\\Database\\Eloquent\\Builder->getModels(Array)
#16 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Model.php(360): Illuminate\\Database\\Eloquent\\Builder->get(Array)
#17 /var/app/html/releases/20180824022105/app/Category.php(13): Illuminate\\Database\\Eloquent\\Model::all()
#18 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Cache/Repository.php(327): App\\Category::App\\{closure}()
#19 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php(304): Illuminate\\Cache\\Repository->remember('list-categories', NULL, Object(Closure))
#20 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Support/Facades/Facade.php(221): Illuminate\\Cache\\CacheManager->__call('remember', Array)
#21 /var/app/html/releases/20180824022105/app/Category.php(20): Illuminate\\Support\\Facades\\Facade::__callStatic('remember', Array)
#22 /var/app/html/releases/20180824022105/routes/web.php(150): App\\Category::getCategories()
#23 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Routing/Router.php(389): Illuminate\\Routing\\Router->{closure}(Object(Illuminate\\Routing\\Router))
#24 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Routing/Router.php(349): Illuminate\\Routing\\Router->loadRoutes(Object(Closure))
#25 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Support/Facades/Facade.php(221): Illuminate\\Routing\\Router->group(Array, Object(Closure))
#26 /var/app/html/releases/20180824022105/routes/web.php(162): Illuminate\\Support\\Facades\\Facade::__callStatic('group', Array)
#27 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Routing/Router.php(393): require('/var/www/turico...')
#28 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Routing/Router.php(349): Illuminate\\Routing\\Router->loadRoutes('/var/www/turico...')
#29 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Routing/RouteRegistrar.php(105): Illuminate\\Routing\\Router->group(Array, '/var/www/turico...')
#30 /var/app/html/releases/20180824022105/app/Providers/RouteServiceProvider.php(56): Illuminate\\Routing\\RouteRegistrar->group('/var/www/turico...')
#31 /var/app/html/releases/20180824022105/app/Providers/RouteServiceProvider.php(40): App\\Providers\\RouteServiceProvider->mapWebRoutes()
#32 [internal function]: App\\Providers\\RouteServiceProvider->map()
#33 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php(29): call_user_func_array(Array, Array)
#34 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php(87): Illuminate\\Container\\BoundMethod::Illuminate\\Container\\{closure}()
#35 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php(31): Illuminate\\Container\\BoundMethod::callBoundMethod(Object(Illuminate\\Foundation\\Application), Array, Object(Closure))
#36 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Container/Container.php(549): Illuminate\\Container\\BoundMethod::call(Object(Illuminate\\Foundation\\Application), Array, Array, NULL)
#37 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Foundation/Support/Providers/RouteServiceProvider.php(74): Illuminate\\Container\\Container->call(Array)
#38 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Foundation/Support/Providers/RouteServiceProvider.php(33): Illuminate\\Foundation\\Support\\Providers\\RouteServiceProvider->loadRoutes()
#39 /var/app/html/releases/20180824022105/app/Providers/RouteServiceProvider.php(28): Illuminate\\Foundation\\Support\\Providers\\RouteServiceProvider->boot()
#40 [internal function]: App\\Providers\\RouteServiceProvider->boot()
#41 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php(29): call_user_func_array(Array, Array)
#42 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php(87): Illuminate\\Container\\BoundMethod::Illuminate\\Container\\{closure}()
#43 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php(31): Illuminate\\Container\\BoundMethod::callBoundMethod(Object(Illuminate\\Foundation\\Application), Array, Object(Closure))
#44 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Container/Container.php(549): Illuminate\\Container\\BoundMethod::call(Object(Illuminate\\Foundation\\Application), Array, Array, NULL)
#45 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Foundation/Application.php(792): Illuminate\\Container\\Container->call(Array)
#46 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Foundation/Application.php(775): Illuminate\\Foundation\\Application->bootProvider(Object(App\\Providers\\RouteServiceProvider))
#47 [internal function]: Illuminate\\Foundation\\Application->Illuminate\\Foundation\\{closure}(Object(App\\Providers\\RouteServiceProvider), 26)
#48 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Foundation/Application.php(776): array_walk(Array, Object(Closure))
#49 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Foundation/Bootstrap/BootProviders.php(17): Illuminate\\Foundation\\Application->boot()
#50 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Foundation/Application.php(213): Illuminate\\Foundation\\Bootstrap\\BootProviders->bootstrap(Object(Illuminate\\Foundation\\Application))
#51 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(162): Illuminate\\Foundation\\Application->bootstrapWith(Array)
#52 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(146): Illuminate\\Foundation\\Http\\Kernel->bootstrap()
#53 /var/app/html/releases/20180824022105/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(116): Illuminate\\Foundation\\Http\\Kernel->sendRequestThroughRouter(Object(Illuminate\\Http\\Request))
#54 /var/app/html/releases/20180824022105/public/index.php(55): Illuminate\\Foundation\\Http\\Kernel->handle(Object(Illuminate\\Http\\Request))
#55 {main}
"}

【问题讨论】：

  • 你的日志说了什么？
  • @Ggg 用日志输出更新了问题
  • 天哪！我看到正在尝试连接环境中不存在的凭据，它在哪里获取它们？我已经做了 php artisan config:clear

标签： php laravel laravel-5 laravel-artisan


【解决方案1】：

您应该验证您是否有bootstrap/cache/config.php 文件。如果是，则表示您的配置已缓存。比你可以运行：

php artisan config:cache

刷新配置并同步您在.env 中设置的数据或

php artisan config:clear

如果您不想使用缓存配置（请记住，建议在生产环境中缓存配置）

【讨论】：

  • 我已经这样做了，但仍在尝试使用不在 env 文件中的凭据进行连接。 config.php 不在 bootstrap/cache 文件夹中，已经 php artisan config:clear php artisan cache:clear 和 php artisan route:clear
  • 错误是来自应用程序还是来自应用程序的其他部分（例如队列）？对于队列，您应该重新启动它们，以防您在启动它们后进行任何更改。
  • 如果不是这样，也许你应该重启你的服务器（也许有些设置缓存在服务器端？）
  • 它来自整个应用程序，但正如我在 tinker 上所说，它运行良好
【解决方案2】：

我遇到了类似的问题，我在安装完其他所有东西后安装了 php7.2-mysql。 Tinker 运行良好，但我的应用程序无法连接。

我花了 2 个小时尝试调试，直到一个简单的 apache 重启就成功了。

【讨论】：

  • 我正在使用 nginx，我已经多次重启了 nginx。没什么可悲的。
【解决方案3】：

我的解决方案是重启laravel开发服务器，即：再次运行php artisan serve。

我在最初运行开发服务器后更改了数据库配置。

【讨论】：

  • 但是这不会影响远程服务器吗？在本地，与我的本地数据库的连接效果很好。但是使用新设置，我的远程服务器将无法连接到我的远程数据库。登录工作的详细信息mysqlworkbench 进入。
  • @Otto 我认为您可能需要在项目的根目录中有两个不同的 .env 文件。其中一个应包含本地环境和数据库的设置，另一个应包含远程环境和数据库的设置。确保只有远程环境的 .env 文件部署到您的服务器！
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