Unexpected warning "Appended trailing slash to static resource location"

[gwimmel]

Describe the bug

In a Spring Boot 3.4.4 application with springdoc-openapi 2.8.4 I get the following unexpected warning message in the log when starting the application:

WARN o.s.w.r.resource.ResourceHandlerUtils    : Appended trailing slash to static resource location: classpath:/META-INF/resources/webjars/swagger-ui/5.18.2/

To Reproduce
Steps to reproduce the behavior:

• create a Spring Boot app with spring-webflux
• add springdoc-openapi 2.8.4 to the dependencies
• create a minimal RestController with a hello world @GetMapping- Method
• run the application

Expected behavior

• no warning message 'Appended trailing slash' in the log

Additional context

• 2.8.4 is the first springdoc-openapi version in which the warning message appears.
• The warning message also appears in the current springdoc-openapi version 2.8.6
• This is also mentioned in #2878 , but this bug was closed, probably because it mainly refers to the path handling change introduced by #2862 which appears to be intended. Most probably the warning is also related to #2862 .
• I could provide a minimal example if it was helpful for analysis.

[bnasslahsen]

Not reproducible, with your current descrption.
Feel free to provide a Minimal, Reproducible Example - with HelloController that reproduces the problem.

This ticket will be closed, but can be reopened if your provide the reproducible sample.

[gwimmel]

@bnasslahsen Thanks for checking. Strange. Did you use spring-webflux?

Here's a minimal example: https://github.com/gwimmel/springdoc-trailingslash-warning

When I run it using mvn spring-boot:run, I get the warning in the log:

[bnasslahsen]

@gwimmel,

Now reproduced!
You validate with the latest SNAPSHOT, if it resolves your issue.

[gwimmel]

@bnasslahsen thanks for the quick fix! I can confirm that the warning message is not logged anymore with springdoc-openapi 2.8.7-SNAPSHOT.