We are experiencing occasional HTTP “520” errors when loading resources from our web-based application. If I refresh the app 50 times it might happen once.
I have reviewed Cloudflare docs and many community topics to find a solution. But so far, I haven’t been able to fix things. I spoke with our hosting company and they also weren’t able to identify any issues on their end. No errors show up in any Apache logs. I do see the successful entries in the Apache log showing HTTP 200 status. But when a file fails to load, there is no record of it in the Apache access log or error log.
Our server is a typical LAMP setup and there is not server-side PHP involved. It’s just Apache accessing files.
Does anyone have any suggestions or things we could change that might help? I’m running out of ideas.