failed to open stream: HTTP request failed!

[grantholle]

I get this error for only some of my users and I really have no idea how to debug it. I personally cannot recreate it but it's happening to others and the logs show for themselves.

I'm using 4.* in a Laravel 5.1 app.

IronCore\HttpException: http error: 0 | file_get_contents(https://mq-aws-us-east-1-1.iron.io:443/3/projects/5642d05d73d0cd0006000003/queues/sum-prod/messages): failed to open stream: HTTP request failed! HTTP/1.1 400 Bad Request
 in /var/www/html/website/vendor/iron-io/iron_core/src/IronCore.php:412
Stack trace:
#0 /var/www/html/website/vendor/iron-io/iron_core/src/IronCore.php(383): IronCore\IronCore->reportHttpError(0, 'file_get_conten...')
#1 /var/www/html/website/vendor/iron-io/iron_core/src/IronCore.php(357): IronCore\IronCore->callWithRetries()
#2 /var/www/html/website/vendor/iron-io/iron_mq/src/IronMQ.php(155): IronCore\IronCore->apiCall('POST', 'https://mq-aws-...', Array)
#3 /var/www/html/website/vendor/laravel/framework/src/Illuminate/Queue/IronQueue.php(85): IronMQ\IronMQ->postMessage('sum-prod', 'eyJpdiI6IkJtT2V...', Array)
#4 /var/www/html/website/vendor/laravel/framework/src/Illuminate/Queue/IronQueue.php(68): Illuminate\Queue\IronQueue->pushRaw('eyJpdiI6IkJtT2V...', NULL)
#5 /var/www/html/website/vendor/laravel/framework/src/Illuminate/Mail/Mailer.php(195): Illuminate\Queue\IronQueue->push('mailer@handleQu...', Array, NULL)
#6 /var/www/html/website/bootstrap/cache/compiled.php(6095): Illuminate\Mail\Mailer->queue('emails.send-now...', Array, 'C:32:"SuperClos...')
#7 /var/www/html/website/app/Http/Controllers/SendNowUpdateController.php(63): Illuminate\Support\Facades\Facade::__callStatic('queue', Array)
#8 [internal function]: App\Http\Controllers\SendNowUpdateController->store(Object(App\Http\Requests\SendNowRequest))
#9 /var/www/html/website/bootstrap/cache/compiled.php(8937): call_user_func_array(Array, Array)
#10 /var/www/html/website/bootstrap/cache/compiled.php(9006): Illuminate\Routing\Controller->callAction('store', Array)
#11 /var/www/html/website/bootstrap/cache/compiled.php(8986): Illuminate\Routing\ControllerDispatcher->call(Object(App\Http\Controllers\SendNowUpdateController), Object(Illuminate\Routing\Route), 'store')
#12 [internal function]: Illuminate\Routing\ControllerDispatcher->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#13 /var/www/html/website/bootstrap/cache/compiled.php(9657): call_user_func(Object(Closure), Object(Illuminate\Http\Request))
#14 [internal function]: Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#15 /var/www/html/website/bootstrap/cache/compiled.php(9639): call_user_func(Object(Closure), Object(Illuminate\Http\Request))
#16 /var/www/html/website/bootstrap/cache/compiled.php(8987): Illuminate\Pipeline\Pipeline->then(Object(Closure))
#17 /var/www/html/website/bootstrap/cache/compiled.php(8972): Illuminate\Routing\ControllerDispatcher->callWithinStack(Object(App\Http\Controllers\SendNowUpdateController), Object(Illuminate\Routing\Route), Object(Illuminate\Http\Request), 'store')
#18 /var/www/html/website/bootstrap/cache/compiled.php(7917): Illuminate\Routing\ControllerDispatcher->dispatch(Object(Illuminate\Routing\Route), Object(Illuminate\Http\Request), 'App\\Http\\Contro...', 'store')
#19 /var/www/html/website/bootstrap/cache/compiled.php(7888): Illuminate\Routing\Route->runWithCustomDispatcher(Object(Illuminate\Http\Request))
#20 /var/www/html/website/bootstrap/cache/compiled.php(7541): Illuminate\Routing\Route->run(Object(Illuminate\Http\Request))
#21 [internal function]: Illuminate\Routing\Router->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#22 /var/www/html/website/bootstrap/cache/compiled.php(9657): call_user_func(Object(Closure), Object(Illuminate\Http\Request))
#23 /var/www/html/website/app/Http/Middleware/Authenticate.php(47): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#24 [internal function]: App\Http\Middleware\Authenticate->handle(Object(Illuminate\Http\Request), Object(Closure))
#25 /var/www/html/website/bootstrap/cache/compiled.php(9649): call_user_func_array(Array, Array)
#26 [internal function]: Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#27 /var/www/html/website/bootstrap/cache/compiled.php(9639): call_user_func(Object(Closure), Object(Illuminate\Http\Request))
#28 /var/www/html/website/bootstrap/cache/compiled.php(7542): Illuminate\Pipeline\Pipeline->then(Object(Closure))
#29 /var/www/html/website/bootstrap/cache/compiled.php(7530): Illuminate\Routing\Router->runRouteWithinStack(Object(Illuminate\Routing\Route), Object(Illuminate\Http\Request))
#30 /var/www/html/website/bootstrap/cache/compiled.php(7515): Illuminate\Routing\Router->dispatchToRoute(Object(Illuminate\Http\Request))
#31 /var/www/html/website/bootstrap/cache/compiled.php(2310): Illuminate\Routing\Router->dispatch(Object(Illuminate\Http\Request))
#32 [internal function]: Illuminate\Foundation\Http\Kernel->Illuminate\Foundation\Http\{closure}(Object(Illuminate\Http\Request))
#33 /var/www/html/website/bootstrap/cache/compiled.php(9657): call_user_func(Object(Closure), Object(Illuminate\Http\Request))
#34 /var/www/html/website/bootstrap/cache/compiled.php(2925): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#35 /var/www/html/website/app/Http/Middleware/VerifyCsrfToken.php(21): Illuminate\Foundation\Http\Middleware\VerifyCsrfToken->handle(Object(Illuminate\Http\Request), Object(Closure))
#36 [internal function]: App\Http\Middleware\VerifyCsrfToken->handle(Object(Illuminate\Http\Request), Object(Closure))
#37 /var/www/html/website/bootstrap/cache/compiled.php(9649): call_user_func_array(Array, Array)
#38 /var/www/html/website/bootstrap/cache/compiled.php(13008): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#39 [internal function]: Illuminate\View\Middleware\ShareErrorsFromSession->handle(Object(Illuminate\Http\Request), Object(Closure))
#40 /var/www/html/website/bootstrap/cache/compiled.php(9649): call_user_func_array(Array, Array)
#41 /var/www/html/website/bootstrap/cache/compiled.php(11600): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#42 [internal function]: Illuminate\Session\Middleware\StartSession->handle(Object(Illuminate\Http\Request), Object(Closure))
#43 /var/www/html/website/bootstrap/cache/compiled.php(9649): call_user_func_array(Array, Array)
#44 /var/www/html/website/bootstrap/cache/compiled.php(12745): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#45 [internal function]: Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse->handle(Object(Illuminate\Http\Request), Object(Closure))
#46 /var/www/html/website/bootstrap/cache/compiled.php(9649): call_user_func_array(Array, Array)
#47 /var/www/html/website/bootstrap/cache/compiled.php(12682): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#48 [internal function]: Illuminate\Cookie\Middleware\EncryptCookies->handle(Object(Illuminate\Http\Request), Object(Closure))
#49 /var/www/html/website/bootstrap/cache/compiled.php(9649): call_user_func_array(Array, Array)
#50 /var/www/html/website/bootstrap/cache/compiled.php(2982): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#51 [internal function]: Illuminate\Foundation\Http\Middleware\CheckForMaintenanceMode->handle(Object(Illuminate\Http\Request), Object(Closure))
#52 /var/www/html/website/bootstrap/cache/compiled.php(9649): call_user_func_array(Array, Array)
#53 [internal function]: Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#54 /var/www/html/website/bootstrap/cache/compiled.php(9639): call_user_func(Object(Closure), Object(Illuminate\Http\Request))
#55 /var/www/html/website/bootstrap/cache/compiled.php(2257): Illuminate\Pipeline\Pipeline->then(Object(Closure))
#56 /var/www/html/website/bootstrap/cache/compiled.php(2240): Illuminate\Foundation\Http\Kernel->sendRequestThroughRouter(Object(Illuminate\Http\Request))
#57 /var/www/html/website/public/index.php(52): Illuminate\Foundation\Http\Kernel->handle(Object(Illuminate\Http\Request))

Like I said, I can't recreate it. Any ideas?