spring boot 3.1.14 completable future appends additional object to response

[eldor9797]

Hi, team.

In Spring Boot 3.1.14
Java 17
Gradle
Windows OS
I wrote API using ComletableFuture. while fetching data from Controller, we get back as response the following json in a single response
{ "id": "993b47c0-7322-4a8d-ae79-73db7def776d", "result": { "object": [ { "type": "BANNER", "data": [ { "id": 2, "title" } ] } ] } }{ "code": -999999, "message": "Type definition error: [simple type, class uz.company.dtos.clients.banner.BannerTitle]", "data": null }

[bclozel]

Thanks for getting in touch, but it feels like this is a question that would be better suited to Stack Overflow. As mentioned in the guidelines for contributing, we prefer to use the issue tracker only for bugs and enhancements. Feel free to update this issue with a link to the re-posted question (so that other people can find it) or add some more details if you feel this is a genuine bug.

[eldor9797]

what do you mean stackoverflow? the json in the response is broken even tho no exception were raised, look at he the response in pic

[bclozel]

Sorry, but JSON snippets and screenshots do not qualify as a bug report. I can only assume that an error happens during serialization and that you're getting some response body and the error response mixed together (see #31511 (comment)).

As for why you're getting that serialization error in the first place, I'd suggest creating a well-written question to StackOverflow that helps people to reproduce the problem you're having.