SpringBoot does not find error templates in production although it finds it in Netbeans

Question

During develepment (under Netbeans), if e.g. an internal server error appears in my java SpringBoot(2.1.3) project with jetty, I get the error page named 500.html that is located in the src/main/resources/templates/error/500.html :

Yet when deployed in production, the 500.html (same for 404.html) does not show because of

org.thymeleaf.exceptions.TemplateInputException: Error resolving template [/error/500], template might not exist or might not be accessible by any of the configured Template Resolvers

although the templates are located in the /BOOT-INF/classes/templates/error/ folder of the jar :

These templates are called in an error controller :

@Controller
public class MyErrorController implements ErrorController {

    @RequestMapping("/error")
    public String handleError(Model model, HttpServletRequest request) {
        Object status = request.getAttribute(RequestDispatcher.ERROR_STATUS_CODE);

        if (status != null) {
            Integer statusCode = Integer.valueOf(status.toString());

            model.addAttribute("errorCode",
                    statusCode);

            if (statusCode == HttpStatus.NOT_FOUND.value()) {
                return "/error/404";
            } else if (statusCode == HttpStatus.INTERNAL_SERVER_ERROR.value()) {
                return "/error/500";
            }

        }

        return "/error/error";
    }

    @Override
    public String getErrorPath() {
        return "/error";
    }

My project pom.xml features the spring-boot-maven-plugin as defined below :

<plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>2.1.3.RELEASE</version>                
                <executions>
                    <execution>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>

Please note : all other templates can be found.

I read this other SO question but my project tree seems correct.

What should I do to make SpringBoot find my error templates ?

Any help appreciated,

HelloWorld · Answer 1 · 2019-06-12T02:50:27.390

In the controller above the path to the error pages is wrong. The path should not start with /. So instead of

 if (statusCode == HttpStatus.NOT_FOUND.value()) {
                return "/error/404";
            } else if (statusCode == HttpStatus.INTERNAL_SERVER_ERROR.value()) {
                return "/error/500";
            }

        }

        return "/error/error";

the controller should be (without the leading /) :

 if (statusCode == HttpStatus.NOT_FOUND.value()) {
                return "error/404";
            } else if (statusCode == HttpStatus.INTERNAL_SERVER_ERROR.value()) {
                return "error/500";
            }

        }

        return "error/error";

Please mind that still there should be one leading / in the getErrorPath() as shown in Baeldung's post :

@Override
    public String getErrorPath() {
        return "/error";
    }

SpringBoot does not find error templates in production although it finds it in Netbeans

1 Answers1