那些遇到过的问题

Different errors in ConnectionFactory.php on line 245 - Laravel 5.4

Jes*_*ter 8 php apache pdo laravel laravel-5.4

I've updated the question a couple of times but left the original question mostly intact so my thought process is easier to follow. I've added a short summary for everyone to decide if they might be able to help with this. Any help is much appreciated.

Summary

  • An error rarely (once every 2-4 weeks) occurs.
  • After the error occurs once every further request that accesses the database also crashes with the same error
  • Error seems to happen in the creation of MySqlConnector in laravel/framework
  • Error has so far only occurred on our live server of this application, so we couldn't leave the error and start debugging but had to hot-fix it to maintain up-time.
  • We did have some issues with connections breaking up randomly (rarely). This started around the same moment. Maybe the issue is a connection breaking up while building the PDO connection?

Stack

  • Apache 2.4.32
  • PHP 7.1.15
  • MariaDB 10.2.6

Detailed question

We've encountered the following error on one of our laravel projects:

[2018-05-29 11:02:05] production.ERROR:
Symfony\Component\Debug\Exception\FatalThrowableError: Illegal offset type in C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Database\Connectors\ConnectionFactory.php:245
Stack trace:
#0 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Database\Connectors\ConnectionFactory.php(183): Illuminate\Database\Connectors\ConnectionFactory->createConnector(Array)
#1 [internal function]: Illuminate\Database\Connectors\ConnectionFactory->Illuminate\Database\Connectors\{closure}()
#2 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Database\Connection.php(883): call_user_func(Object(Closure))
#3 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Database\Connection.php(445): Illuminate\Database\Connection->getPdo()
#4 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Database\Connection.php(640): Illuminate\Database\Connection->Illuminate\Database\{closure}('insert into `lo...', Array)
#5 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Database\Connection.php(607): Illuminate\Database\Connection->runQueryCallback('insert into `lo...', Array, Object(Closure))
#6 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Database\Connection.php(450): Illuminate\Database\Connection->run('insert into `lo...', Array, Object(Closure))
#7 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Database\Connection.php(404): Illuminate\Database\Connection->statement('insert into `lo...', Array)
#8 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Database\Query\Processors\Processor.php(32): Illuminate\Database\Connection->insert('insert into `lo...', Array)
#9 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Database\Query\Builder.php(2138): Illuminate\Database\Query\Processors\Processor->processInsertGetId(Object(Illuminate\Database\Query\Builder), 'insert into `lo...', Array, 'id')
#10 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Builder.php(1251): Illuminate\Database\Query\Builder->insertGetId(Array, 'id')
#11 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Model.php(684): Illuminate\Database\Eloquent\Builder->__call('insertGetId', Array)
#12 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Model.php(649): Illuminate\Database\Eloquent\Model->insertAndSetId(Object(Illuminate\Database\Eloquent\Builder), Array)
#13 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Model.php(518): Illuminate\Database\Eloquent\Model->performInsert(Object(Illuminate\Database\Eloquent\Builder))
#14 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Builder.php(734): Illuminate\Database\Eloquent\Model->save()
#15 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Support\helpers.php(950): Illuminate\Database\Eloquent\Builder->Illuminate\Database\Eloquent\{closure}(Object(App\Error))
#16 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Builder.php(735): tap(Object(App\Error), Object(Closure))
#17 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Model.php(1357): Illuminate\Database\Eloquent\Builder->create(Array)
#18 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Model.php(1369): Illuminate\Database\Eloquent\Model->__call('create', Array)
#19 C:\Webserver\Websites\www.somedomain.com\webroot\app\Exceptions\Handler.php(246): Illuminate\Database\Eloquent\Model::__callStatic('create', Array)
#20 C:\Webserver\Websites\www.somedomain.com\webroot\app\Exceptions\Handler.php(217): App\Exceptions\Handler->logErrorAndNotify(Array, Object(Symfony\Component\Debug\Exception\FatalThrowableError))
#21 C:\Webserver\Websites\www.somedomain.com\webroot\app\Exceptions\Handler.php(106): App\Exceptions\Handler->logThenRenderServerException(Object(Illuminate\Http\Request), Object(Symfony\Component\Debug\Exception\FatalThrowableError), 500)
#22 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Foundation\Http\Kernel.php(326): App\Exceptions\Handler->render(Object(Illuminate\Http\Request), Object(Symfony\Component\Debug\Exception\FatalThrowableError))
#23 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Foundation\Http\Kernel.php(124): Illuminate\Foundation\Http\Kernel->renderException(Object(Illuminate\Http\Request), Object(Symfony\Component\Debug\Exception\FatalThrowableError))
#24 C:\Webserver\Websites\www.somedomain.com\webroot\public\index.php(53): Illuminate\Foundation\Http\Kernel->handle(Object(Illuminate\Http\Request))
#25 {main}
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Once this error occurred for the first time all requests to the website triggered the exact same error.

Googling the issue all i found was the following 2 solutions:

  1. run php artisan config:cache or php artisan config:clear
  2. restart the web server

One example of where these solutions were found can be found here

Now restarting the web server worked, but within an hour we had the same issue come up again. Did another restart and it seems to work for now, but i'd like to know what causes this and how can we prevent it?

更多信息:

  • 我们正在使用Redis来缓存包括配置在内的所有内容.
  • 托管是使用自定义apache堆栈完成的.
  • 该网站已经运行了几个月,但有些重新启动,但从未遇到过这个问题.
  • 今天第一次发生问题时,服务器已经填满了它的内存容量,第二次它发生了15 GB的内存.

任何线索或建议将不胜感激.如果需要更多信息来回答问题,我会在被要求时尝试扩展问题.

更新:

所以我们再次出现错误,同一行但不同的错误.我认为构建PDO连接出了问题,然后存储该连接以便在一段时间内再次用于所有未来的请求？

这是新的堆栈跟踪:

[2018-06-25 15:27:38] production.ERROR: Symfony\Component\Debug\Exception\FatalThrowableError: Undefined class constant 'PDO::ATTR_CASE' in C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Database\Connectors\ConnectionFactory.php:245
Stack trace:
#0 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Database\Connectors\ConnectionFactory.php(183): Illuminate\Database\Connectors\ConnectionFactory->createConnector(Array)
#1 [internal function]: Illuminate\Database\Connectors\ConnectionFactory->Illuminate\Database\Connectors\{closure}()
#2 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Database\Connection.php(883): call_user_func(Object(Closure))
#3 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Database\Connection.php(904): Illuminate\Database\Connection->getPdo()
#4 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Database\Connection.php(392): Illuminate\Database\Connection->getReadPdo()
#5 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Database\Connection.php(318): Illuminate\Database\Connection->getPdoForSelect(true)
#6 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Database\Connection.php(640): Illuminate\Database\Connection->Illuminate\Database\{closure}('select * from `...', Array)
#7 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Database\Connection.php(607): Illuminate\Database\Connection->runQueryCallback('select * from `...', Array, Object(Closure))
#8 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Database\Connection.php(326): Illuminate\Database\Connection->run('select * from `...', Array, Object(Closure))
#9 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Database\Query\Builder.php(1710): Illuminate\Database\Connection->select('select * from `...', Array, true)
#10 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Database\Query\Builder.php(1695): Illuminate\Database\Query\Builder->runSelect()
#11 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Builder.php(462): Illuminate\Database\Query\Builder->get(Array)
#12 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Builder.php(446): Illuminate\Database\Eloquent\Builder->getModels(Array)
#13 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Database\Concerns\BuildsQueries.php(75): Illuminate\Database\Eloquent\Builder->get(Array)
#14 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Builder.php(391): Illuminate\Database\Eloquent\Builder->first(Array)
#15 C:\Webserver\Websites\www.somedomain.com\webroot\app\Http\Controllers\Webshop\HomeController.php(268): Illuminate\Database\Eloquent\Builder->firstOrFail()
#16 [internal function]: App\Http\Controllers\Webshop\HomeController->showArticleDetail('BOSAL-287-273-1...')
#17 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Routing\Controller.php(55): call_user_func_array(Array, Array)
#18 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Routing\ControllerDispatcher.php(44): Illuminate\Routing\Controller->callAction('showArticleDeta...', Array)
#19 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Routing\Route.php(203): Illuminate\Routing\ControllerDispatcher->dispatch(Object(Illuminate\Routing\Route), Object(App\Http\Controllers\Webshop\HomeController), 'showArticleDeta...')
#20 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Routing\Route.php(160): Illuminate\Routing\Route->runController()
#21 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Routing\Router.php(574): Illuminate\Routing\Route->run()
#22 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php(30): Illuminate\Routing\Router->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#23 C:\Webserver\Websites\www.somedomain.com\webroot\app\Http\Middleware\Localization.php(43): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#24 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php(148): App\Http\Middleware\Localization->handle(Object(Illuminate\Http\Request), Object(Closure))
#25 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#26 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Routing\Middleware\SubstituteBindings.php(41): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#27 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php(148): Illuminate\Routing\Middleware\SubstituteBindings->handle(Object(Illuminate\Http\Request), Object(Closure))
#28 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#29 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Foundation\Http\Middleware\VerifyCsrfToken.php(65): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#30 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php(148): Illuminate\Foundation\Http\Middleware\VerifyCsrfToken->handle(Object(Illuminate\Http\Request), Object(Closure))
#31 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#32 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\View\Middleware\ShareErrorsFromSession.php(49): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#33 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php(148): Illuminate\View\Middleware\ShareErrorsFromSession->handle(Object(Illuminate\Http\Request), Object(Closure))
#34 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#35 C:\Webserver\Websites\www.somedomain.com\webroot\app\Http\Middleware\ConfigureBugsnap.php(36): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#36 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php(148): App\Http\Middleware\ConfigureBugsnap->handle(Object(Illuminate\Http\Request), Object(Closure))
#37 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#38 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Session\Middleware\StartSession.php(64): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#39 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php(148): Illuminate\Session\Middleware\StartSession->handle(Object(Illuminate\Http\Request), Object(Closure))
#40 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#41 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse.php(37): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#42 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php(148): Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse->handle(Object(Illuminate\Http\Request), Object(Closure))
#43 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#44 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Cookie\Middleware\EncryptCookies.php(59): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#45 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php(148): Illuminate\Cookie\Middleware\EncryptCookies->handle(Object(Illuminate\Http\Request), Object(Closure))
#46 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#47 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php(102): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#48 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Routing\Router.php(576): Illuminate\Pipeline\Pipeline->then(Object(Closure))
#49 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Routing\Router.php(535): Illuminate\Routing\Router->runRouteWithinStack(Object(Illuminate\Routing\Route), Object(Illuminate\Http\Request))
#50 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Routing\Router.php(513): Illuminate\Routing\Router->dispatchToRoute(Object(Illuminate\Http\Request))
#51 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Foundation\Http\Kernel.php(176): Illuminate\Routing\Router->dispatch(Object(Illuminate\Http\Request))
#52 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php(30): Illuminate\Foundation\Http\Kernel->Illuminate\Foundation\Http\{closure}(Object(Illuminate\Http\Request))
#53 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\spatie\laravel-robots-middleware\src\RobotsMiddleware.php(14): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#54 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php(148): Spatie\RobotsMiddleware\RobotsMiddleware->handle(Object(Illuminate\Http\Request), Object(Closure))
#55 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#56 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Foundation\Http\Middleware\TransformsRequest.php(30): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#57 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php(148): Illuminate\Foundation\Http\Middleware\TransformsRequest->handle(Object(Illuminate\Http\Request), Object(Closure))
#58 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#59 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Foundation\Http\Middleware\TransformsRequest.php(30): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#60 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php(148): Illuminate\Foundation\Http\Middleware\TransformsRequest->handle(Object(Illuminate\Http\Request), Object(Closure))
#61 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#62 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Foundation\Http\Middleware\ValidatePostSize.php(27): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#63 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php(148): Illuminate\Foundation\Http\Middleware\ValidatePostSize->handle(Object(Illuminate\Http\Request), Object(Closure))
#64 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#65 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Foundation\Http\Middleware\CheckForMaintenanceMode.php(46): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#66 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php(148): Illuminate\Foundation\Http\Middleware\CheckForMaintenanceMode->handle(Object(Illuminate\Http\Request), Object(Closure))
#67 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#68 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php(102): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#69 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Foundation\Http\Kernel.php(151): Illuminate\Pipeline\Pipeline->then(Object(Closure))
#70 C:\Webserver\Websites\www.somedomain.com\webroot\vendor\laravel\framework\src\Illuminate\Foundation\Http\Kernel.php(116): Illuminate\Foundation\Http\Kernel->sendRequestThroughRouter(Object(Illuminate\Http\Request))
#71 C:\Webserver\Websites\www.somedomain.com\webroot\public\index.php(53): Illuminate\Foundation\Http\Kernel->handle(Object(Illuminate\Http\Request))
#72 {main}
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The error line is once again on line 245 of ConnectionFactory from laravel/framework. This line is the return new MySQLConnector; line from the function below:

/**
 * Create a connector instance based on the configuration.
 *
 * @param  array  $config
 * @return \Illuminate\Database\Connectors\ConnectorInterface
 *
 * @throws \InvalidArgumentException
 */
public function createConnector(array $config)
{
    if (! isset($config['driver'])) {
        throw new InvalidArgumentException('A driver must be specified.');
    }

    if ($this->container->bound($key = "db.connector.{$config['driver']}")) {
        return $this->container->make($key);
    }

    switch ($config['driver']) {
        case 'mysql':
            return new MySqlConnector;
        case 'pgsql':
            return new PostgresConnector;
        case 'sqlite':
            return new SQLiteConnector;
        case 'sqlsrv':
            return new SqlServerConnector;
    }

    throw new InvalidArgumentException("Unsupported driver [{$config['driver']}]");
}
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The class MySqlConnector extends the class Connector. The first few lines of Connecter are:

<?php

namespace Illuminate\Database\Connectors;

use PDO;
use Exception;
use Illuminate\Support\Arr;
use Doctrine\DBAL\Driver\PDOConnection;
use Illuminate\Database\DetectsLostConnections;

class Connector
{
    use DetectsLostConnections;

    /**
     * The default PDO connection options.
     *
     * @var array
     */
    protected $options = [
        PDO::ATTR_CASE => PDO::CASE_NATURAL,
        PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
        PDO::ATTR_ORACLE_NULLS => PDO::NULL_NATURAL,
        PDO::ATTR_STRINGIFY_FETCHES => false,
        PDO::ATTR_EMULATE_PREPARES => false,
    ];
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It seems like PDO::ATTR_CASE should be set. Or maybe PDO::CASE_NATURAL is also not set? I'm not totally understanding what exactly happens, but somewhere in the creation of a new MySqlConnecter object, or the creation of the underlying Connector it returns the error that this is not set. First i thought it had to do with some of the functions in the class. But seeing that the Trace stops at the creation means that the error can't really come from any of the functions.

So something has to go wrong in using the PDO class i think? Connecter.php also has the following line at the start: 'use Doctrine\DBAL\Driver\PDOConnection;' which extends PDO as well.

Once this happens every further request for each user gives back the same error with stack trace until we restart Apache, this i don't understand at all. It seems like it could happen if somehow the PDO file was not available but i'm unsure why it keeps happening then and why a restart of Apache solves it.

Below are the subquestions that might help solve the issue:

  1. What causes this error to show up?
  2. If the above can't be easily answered, what can i do to get better understand this issue? It has only rarely occured on our live environment, so we have not had the chance to just put dd's everywhere to go through it step by step. And had to reach for the quickfix everytime which is just restarting Apache.
  3. Why does every request after the initial failure fail as well with the same error?

Jes*_*ter 3

我们最后一次尝试重新启动 MySQL 服务器以及 Apache。（按顺序）这似乎解决了问题。以防万一我们那天晚上也重新启动了服务器。

这为我们解决了这个问题，但是如果有人对导致问题的原因有更好的答案，并且有一些实际知识，我希望他们分享他们的知识！

编辑：仍然没有修复，似乎是一个临时修复。

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