![Apache 2.4 MPM event module causing intermittent 502 errors and slow response times behind an AWS Application Load Balancer (ALB) - Server Fault Apache 2.4 MPM event module causing intermittent 502 errors and slow response times behind an AWS Application Load Balancer (ALB) - Server Fault](https://i.stack.imgur.com/kfyMR.png)
Apache 2.4 MPM event module causing intermittent 502 errors and slow response times behind an AWS Application Load Balancer (ALB) - Server Fault
![How to Track Configuration Changes to Classic Load Balancers Using AWS Config | AWS Cloud Operations & Migrations Blog How to Track Configuration Changes to Classic Load Balancers Using AWS Config | AWS Cloud Operations & Migrations Blog](https://d2908q01vomqb2.cloudfront.net/972a67c48192728a34979d9a35164c1295401b71/2018/02/08/Picture1-3.png)
How to Track Configuration Changes to Classic Load Balancers Using AWS Config | AWS Cloud Operations & Migrations Blog
Intermittent error: MongoConnectionException:No suitable servers found (`serverselectiontryonce` set): [Server closed connection. calling ismaster on 'x.x.x.x:27017']' · Issue #532 · mongodb/mongo-php-driver · GitHub
![Apache 2.4 MPM event module causing intermittent 502 errors and slow response times behind an AWS Application Load Balancer (ALB) - Server Fault Apache 2.4 MPM event module causing intermittent 502 errors and slow response times behind an AWS Application Load Balancer (ALB) - Server Fault](https://i.stack.imgur.com/4xSZk.png)