We are using ORDS 20 deployed on a weblogic server (12c) and assigned a manager server as target. It is working fine as expected but very randomly for one of the endpoint in production we are getting below error and after sometime it works as expected. Not able to replicate the same error in lower instances
502 - Web server received an invalid response while acting as a gateway or proxy server.</h2>
There is a problem with the page you are looking for, and it cannot be displayed. When the Web server (while acting as a gateway or proxy) contacted the upstream content server, it received an invalid response from the content server.
Verified weblogic adminserver and managed server log, don't see any errors.
same exact endpoint call with same query parameters working fine after sometime. verified backend ords query in database as well, result comes in less than 2 seconds.
How to debug and find the root cause. Could someone please help, if anyone has faced the similar issue.