Error Pages cache too much

[sdelamo]

Issue description

Vytas

I just upgraded to latest micronaut version, and now 400 and 404 errors have a blue background. I am not sure why, and errors for parameters are beeing cached somehow, if I have api that requires params a and b, and I do not supply any arguments, I will get error saying "Required argument [a] not specified" but then even if I fill a, it will still say same, but it actually should complain about param [b].. is there a way to turn off this feature?

Sergio del Amo — Yesterday at 14:18

I don’t think they are cached. Do you have a reproducer.
They errors are displayed in a nice HTML page only If the response accepts HTML
Why? Because it is a best user experience when accessing in the browser than the previous default

Vytas — Yesterday at 14:20

I can do a quick test with new repo to see if I can reproduce, are there any templates to use or I just can create from micronaut launch?

Sergio del Amo — Yesterday at 14:20

This is the Pr https://github.com/micronaut-projects/micronaut-core/pull/11210/files
Yes, you can create a reproducer from stater

Vytas — Yesterday at 14:27

I just tested by creating a new app with same features as mine, created endpoint with a and b params and tryed to access it, I get error: and then if I fill inn a and refresh browser I still see same message. Something is not working.
This is url for app

curl --location --request GET 'https://launch.micronaut.io/create/default/com.error.example?lang=JAVA&build=GRADLE_KOTLIN&test=JUNIT&javaVersion=JDK_21&features=micronaut-aop&features=openapi&features=retry&features=swagger-ui&features=openapi-explorer&features=cache-caffeine&features=http-client&features=properties&features=data-jdbc&features=flyway&features=postgres&features=testcontainers&features=awaitility&features=control-panel&features=junit-params&features=micronaut-test-rest-assured&features=mockito&features=test-resources&features=langchain4j-googleai-gemini&features=management&features=micrometer-annotation&features=micrometer-prometheus&features=graalvm&features=micronaut-http-validation&features=validation&features=views-velocity&features=websocket' --output example.zip
@Get(uri="/", produces="text/plain")
    public String index(String a, String b) {
        return "Example Response";
    }

This is controller
First open this url: http://localhost:8080/example
then open this url: http://localhost:8080/example?a=a

Same error message
Something is beein cached.
Just a tip: run application with ./gradlew run

Vytas — Yesterday at 14:35

But this should be opt in feature anyways.. Most of the time even tho I develop APIs for other services to consume, when I open them in browser I want to see the same thing as another service would see it, not in pretty format, that does not help me debug issues.

Vytas — Yesterday at 14:59

I have also a finished repo with a tests that shows that its failing: https://github.com/Dalisra/exampleRepo-mnError