List of error codes may seen in logs during troubleshooting
Successfully could connect and get the response.
Page not Found.
Check whether application is deployed in web server. It indicates that requested resource is not available.
Internal server error.
There must be error reason shown in the browser.
It could be due to application error or permission errors.
The request requires authentication.
Ex: It is thrown when access windows authentication enabled application without credentials
It could be due to various reasons.
- Client certificate is required
- IP address rejected..etc
Request sent to server is not correct. May be it is not in correct format.
scenario encountered often in one of the project : JWT token sent to server is not valid as it is decrypted with different public key.
Method not allowed
Ex: Server supports POST method but trying to access with GET method.
Error comes when server has a rate limiting
1XX Series is Progress [101 Used for switching protocols from HTTP to Web Sockets]
2XX Series is Success [202 for example is used these days in REST for accepting edit/add a record]
3XX Series is Redirection related [Say HTTP to HTTPS]
4XX Series is Protocol mismatches [Auth required but no auth sent etc.. Notable ones are 400,401,403,405,407,409,413,429]
5XX Series is Server error related [500,502,503,504 are the notable ones]