Phate Shepherd Posted September 14, 2020 Share Posted September 14, 2020 I'm encountering a few customers that are getting http error 502 when product communicates with my server. This started after changing where the DNS pointed from one server to another commercial hosting service. All logs are clean on the host, so I don't know where the communication is breaking down. In one instance, the person having the problem got their region restarted and the problem went away. Two others restarted or had their regions restarted, but it didn't fix it. I don't know yet if they are on full or homestead regions, and if that would change the results. (Maybe restarting a homestead doesn't restart the proxy?) The body of the 502 error: <html> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> </meta> <title>ERROR: The requested URL could not be retrieved</title> <body id="ERR_READ_ERROR"> <div id="titles"> <h1>ERROR</h1> <h2>Read Error</h2> </div> <p><b>Read Error</b></p> <!-- ERR_READ_ERROR --> </body></html> Link to comment Share on other sites More sharing options...
Oz Linden Posted September 15, 2020 Share Posted September 15, 2020 This is most likely DNS caches not updating to your new server uniformly; it should correct itself in time. Link to comment Share on other sites More sharing options...
Phate Shepherd Posted September 15, 2020 Author Share Posted September 15, 2020 (edited) 20 minutes ago, Oz Linden said: This is most likely DNS caches not updating to your new server uniformly; it should correct itself in time. That's the thing... it's been 5 days, and the TTL on the DNS records were set to an hour LONG before the change... and even if it was pointing to the old server, it is still up, so it would service the call. One of the people having the issue restarted their region and it went away. I've got a ticket open to have it checked out on the region Carbonara before it restarts and possibly fixes itself. There is something going on here that isn't DNS caching related. OHH, and another domain on the same server that hasn't changed in many years also gives the same 502 error on the troublesome regions. Edited September 15, 2020 by Phate Shepherd Link to comment Share on other sites More sharing options...
Oz Linden Posted September 15, 2020 Share Posted September 15, 2020 something like this is best dealt with as a Support request, so I'll leave it to them 1 Link to comment Share on other sites More sharing options...
Phate Shepherd Posted September 15, 2020 Author Share Posted September 15, 2020 (edited) For those googling in the future for the cause of http 502 errors in their scripts, it was finally determined to be a firewall issue at the hosting company. After they found and removed the IP address of that particular simulator from their firewall, the error went away. Many thanks to Maestro. Edited September 15, 2020 by Phate Shepherd 1 Link to comment Share on other sites More sharing options...
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