I'm getting 500 and 502 errors on my PHP 7 app on GAE Flex. Not on every request but on some random ones. Refreshing the page usually works. Also, the application feels sluggish overall.
The requests with errors do not show up in GAE logs but only in Cloud HTTP Load Balancer.
No changes have been made to the code since Thursday when everything was working correctly. We have a very important demo coming up and these issues always seem to pop up right before or even during important demos.
Is there an issue with Cloud HTTP Load Balancer.