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@Async does not support Unit? return type #31881

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HappyHepo opened this issue Dec 21, 2023 · 3 comments
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@Async does not support Unit? return type #31881

HappyHepo opened this issue Dec 21, 2023 · 3 comments
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@sdeleuze
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in: core Issues in core modules (aop, beans, core, context, expression) status: backported An issue that has been backported to maintenance branches theme: kotlin An issue related to Kotlin support type: bug A general bug
Milestone
6.1.3

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@HappyHepo
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HappyHepo commented Dec 21, 2023 •
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Affects: 6.0.13

When using @Async with Kotlin functions, it is not possible to use Unit?-returning functions.
kotlin.Unit corresponds to void in Java (https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/), but the nullable version is not recognized when submitting the task: https://github.com/spring-projects/spring-framework/blob/main/spring-aop/src/main/java/org/springframework/aop/interceptor/AsyncExecutionAspectSupport.java#L295
@spring-projects-issues spring-projects-issues added the status: waiting-for-triage An issue we've not yet triaged or decided on label Dec 21, 2023
@sdeleuze
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Could you please provide a reproducer as an attached archive or a link to a repository?

@sdeleuze sdeleuze added the status: waiting-for-feedback We need additional information before we can continue label Dec 21, 2023
@sdeleuze sdeleuze self-assigned this Dec 21, 2023
@sdeleuze sdeleuze added the theme: kotlin An issue related to Kotlin support label Dec 21, 2023
@HappyHepo
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While creating a reproduction, I narrowed the issue down. It actually does only occur when returning Unit?, I updated the original issue accordingly.
minimal reproduction

@spring-projects-issues spring-projects-issues added status: feedback-provided Feedback has been provided and removed status: waiting-for-feedback We need additional information before we can continue labels Dec 21, 2023
@sdeleuze
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Interesting, thanks for sharing, I will have a deeper look.

@sdeleuze sdeleuze added type: bug A general bug in: core Issues in core modules (aop, beans, core, context, expression) and removed status: waiting-for-triage An issue we've not yet triaged or decided on status: feedback-provided Feedback has been provided labels Dec 22, 2023
@sdeleuze sdeleuze added this to the 6.1.3 milestone Dec 22, 2023
@github-actions github-actions bot added status: backported An issue that has been backported to maintenance branches and removed for: backport-to-6.0.x labels Dec 22, 2023
@github-actions github-actions bot mentioned this issue Dec 22, 2023
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@sdeleuze sdeleuze changed the title @Async does not support kotlin.Unit as return type @Async does not support Unit? return type Dec 22, 2023
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@sdeleuze sdeleuze

Labels
in: core Issues in core modules (aop, beans, core, context, expression) status: backported An issue that has been backported to maintenance branches theme: kotlin An issue related to Kotlin support type: bug A general bug
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Milestone
6.1.3
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@sdeleuze @spring-projects-issues @HappyHepo