SROAP04005: Could not find schema class in index: java.lang.Void when using rest-client-reactive with Uni<Void>

[mswiderski]

Describe the bug

When using rest-client-reactive that uses following method on the interface

    @POST
    @Path("/name/{countryName}")
    Uni<Void> createCountry(String countryName);

with OpenAPI extension in the project, following warning is logged

SROAP04005: Could not find schema class in index: java.lang.Void

Expected behavior

No warning is logged

Actual behavior

Logged warning SROAP04005: Could not find schema class in index: java.lang.Void

How to Reproduce?

It can be reproduced with rest-client-reactive-quickstart

1. add following method to org.acme.rest.client.CountriesService
2. add open api extension to pom.xml
3. run the project in dev mode

Output of uname -a or ver

Darwin MacBook-Pro.local 20.6.0 Darwin Kernel Version 20.6.0: Wed Jun 23 00:26:31 PDT 2021; root:xnu-7195.141.2~5/RELEASE_X86_64 x86_64

Output of java -version

openjdk version "11.0.11" 2021-04-20
OpenJDK Runtime Environment AdoptOpenJDK-11.0.11+9 (build 11.0.11+9)
OpenJDK 64-Bit Server VM AdoptOpenJDK-11.0.11+9 (build 11.0.11+9, mixed mode)

GraalVM version (if different from Java)

No response

Quarkus version or git rev

2.2.2.Final

Build tool (ie. output of mvnw --version or gradlew --version)

maven-3.6.3

Additional information

No response

[quarkus-bot]

/cc @michalszynkiewicz

[michalszynkiewicz]

@mswiderski thanks for the report :)
Do I understand correctly that it works okay without openapi and causes an error if openapi is added?

[mswiderski]

in general it all works but it logs the warning, only when the open api is added

[michalszynkiewicz]

CC @phillip-kruger

[phillip-kruger]

This seems like a bug, we probably do not treat Void in Uni as void . This will need to be fixed in SmallRye. @mswiderski would you open an issue there ?

[mswiderski]

@phillip-kruger issue created smallrye/smallrye-open-api#914

[geoand]

@phillip-kruger any chance we will get a new version of the Openapi dependency before next week so we can include it in 2.3.0.Final?

[phillip-kruger]

For sure ! I'll release later today

[geoand]

Great, thanks!