Hello, I'm a student studying development. The school is working on a project.
Boot using the springAn unknown error has often the cause to developing will raise questions.
When testing on the local host, it goes without any problems When you upload a project to AWS AMI and use it, it is often
h h h h h h h h h h h c[1001,"null"] <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"> 502 Bad Gateway Bad Gateway The proxy server received an invalid response from an upstream server.
This is how the error appears. There is a typo in my code, so I don't know where the h is coming from, and I don't know where that message comes from.
There's nothing wrong with looking at catalina.out, and it doesn't come out every time, but there's an error like that once in a while, but it doesn't look good, so I'm asking you a question because I want to solve it.
spring aws
I think you should check the apache log at the time the error occurred. It's an open web server outside, so it could be a request from bot or hackers.
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