Connection timed out [tcp://172.16.2.21:6379] (500 Internal Server Error)

PredisConnectionConnectionException:
Connection timed out [tcp://172.16.2.21:6379]

  at /www/www.latestly.com/vendor/predis/predis/src/Connection/AbstractConnection.php:155
  at PredisConnectionAbstractConnection->onConnectionError()
     (/www/www.latestly.com/vendor/predis/predis/src/Connection/StreamConnection.php:128)
  at PredisConnectionStreamConnection->createStreamSocket()
     (/www/www.latestly.com/vendor/predis/predis/src/Connection/StreamConnection.php:178)
  at PredisConnectionStreamConnection->tcpStreamInitializer()
     (/www/www.latestly.com/vendor/predis/predis/src/Connection/StreamConnection.php:100)
  at PredisConnectionStreamConnection->createResource()
     (/www/www.latestly.com/vendor/predis/predis/src/Connection/AbstractConnection.php:81)
  at PredisConnectionAbstractConnection->connect()
     (/www/www.latestly.com/vendor/predis/predis/src/Connection/StreamConnection.php:258)
  at PredisConnectionStreamConnection->connect()
     (/www/www.latestly.com/vendor/predis/predis/src/Connection/AbstractConnection.php:180)
  at PredisConnectionAbstractConnection->getResource()
     (/www/www.latestly.com/vendor/predis/predis/src/Connection/StreamConnection.php:288)
  at PredisConnectionStreamConnection->write()
     (/www/www.latestly.com/vendor/predis/predis/src/Connection/StreamConnection.php:394)
  at PredisConnectionStreamConnection->writeRequest()
     (/www/www.latestly.com/vendor/predis/predis/src/Connection/AbstractConnection.php:110)
  at PredisConnectionAbstractConnection->executeCommand()
     (/www/www.latestly.com/vendor/predis/predis/src/Client.php:331)
  at PredisClient->executeCommand()
     (/www/www.latestly.com/vendor/predis/predis/src/Client.php:313)
  at PredisClient->__call()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Redis/Connections/Connection.php:116)
  at IlluminateRedisConnectionsConnection->command()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Redis/Connections/Connection.php:216)
  at IlluminateRedisConnectionsConnection->__call()
     (/www/www.latestly.com/app/helpers.php:31)
  at getRedisData()
     (/www/www.latestly.com/app/Http/Controllers/ArticleController.php:43)
  at AppHttpControllersArticleController->article()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54)
  at IlluminateRoutingController->callAction()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43)
  at IlluminateRoutingControllerDispatcher->dispatch()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Routing/Route.php:259)
  at IlluminateRoutingRoute->runController()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Routing/Route.php:205)
  at IlluminateRoutingRoute->run()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Routing/Router.php:799)
  at IlluminateRoutingRouter->IlluminateRouting{closure}()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:141)
  at IlluminatePipelinePipeline->IlluminatePipeline{closure}()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Routing/Middleware/SubstituteBindings.php:50)
  at IlluminateRoutingMiddlewareSubstituteBindings->handle()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:180)
  at IlluminatePipelinePipeline->IlluminatePipeline{closure}()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/VerifyCsrfToken.php:78)
  at IlluminateFoundationHttpMiddlewareVerifyCsrfToken->handle()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:180)
  at IlluminatePipelinePipeline->IlluminatePipeline{closure}()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/View/Middleware/ShareErrorsFromSession.php:49)
  at IlluminateViewMiddlewareShareErrorsFromSession->handle()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:180)
  at IlluminatePipelinePipeline->IlluminatePipeline{closure}()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Session/Middleware/StartSession.php:121)
  at IlluminateSessionMiddlewareStartSession->handleStatefulRequest()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Session/Middleware/StartSession.php:64)
  at IlluminateSessionMiddlewareStartSession->handle()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:180)
  at IlluminatePipelinePipeline->IlluminatePipeline{closure}()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Cookie/Middleware/AddQueuedCookiesToResponse.php:37)
  at IlluminateCookieMiddlewareAddQueuedCookiesToResponse->handle()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:180)
  at IlluminatePipelinePipeline->IlluminatePipeline{closure}()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Cookie/Middleware/EncryptCookies.php:67)
  at IlluminateCookieMiddlewareEncryptCookies->handle()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:180)
  at IlluminatePipelinePipeline->IlluminatePipeline{closure}()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:116)
  at IlluminatePipelinePipeline->then()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Routing/Router.php:798)
  at IlluminateRoutingRouter->runRouteWithinStack()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Routing/Router.php:777)
  at IlluminateRoutingRouter->runRoute()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Routing/Router.php:741)
  at IlluminateRoutingRouter->dispatchToRoute()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Routing/Router.php:730)
  at IlluminateRoutingRouter->dispatch()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php:200)
  at IlluminateFoundationHttpKernel->IlluminateFoundationHttp{closure}()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:141)
  at IlluminatePipelinePipeline->IlluminatePipeline{closure}()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Http/Middleware/TrustProxies.php:39)
  at IlluminateHttpMiddlewareTrustProxies->handle()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:180)
  at IlluminatePipelinePipeline->IlluminatePipeline{closure}()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/TransformsRequest.php:21)
  at IlluminateFoundationHttpMiddlewareTransformsRequest->handle()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/ConvertEmptyStringsToNull.php:31)
  at IlluminateFoundationHttpMiddlewareConvertEmptyStringsToNull->handle()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:180)
  at IlluminatePipelinePipeline->IlluminatePipeline{closure}()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/TransformsRequest.php:21)
  at IlluminateFoundationHttpMiddlewareTransformsRequest->handle()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/TrimStrings.php:40)
  at IlluminateFoundationHttpMiddlewareTrimStrings->handle()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:180)
  at IlluminatePipelinePipeline->IlluminatePipeline{closure}()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/ValidatePostSize.php:27)
  at IlluminateFoundationHttpMiddlewareValidatePostSize->handle()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:180)
  at IlluminatePipelinePipeline->IlluminatePipeline{closure}()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/PreventRequestsDuringMaintenance.php:86)
  at IlluminateFoundationHttpMiddlewarePreventRequestsDuringMaintenance->handle()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:180)
  at IlluminatePipelinePipeline->IlluminatePipeline{closure}()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:116)
  at IlluminatePipelinePipeline->then()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php:175)
  at IlluminateFoundationHttpKernel->sendRequestThroughRouter()
     (/www/www.latestly.com/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php:144)
  at IlluminateFoundationHttpKernel->handle()
     (/www/www.latestly.com/public/index.php:54)