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@Scheduled task runs twice on bean with target-class scoped proxy (when injected) [SPR-17166] #21702

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spring-projects-issues opened this issue Aug 11, 2018 · 2 comments
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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 type: bug A general bug
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spring-projects-issues commented Aug 11, 2018

Markus Malkusch opened SPR-17166 and commented

When a proxied bean has a @Scheduled annotation, that task is executed twice as if there would be two beans. As a user I would expect that a proxied bean still behaves and acts as there would be only one bean. I would expect the task to be executed only once.

If you run the example, you notice two outputs every second, while I would expect only one output per second.


Affects: 4.3.18, 5.0.8

Reference URL: spring-attic/spring-framework-issues#182

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Backported to: 4.3.19

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spring-projects-issues commented Aug 11, 2018

Juergen Hoeller commented

This seems to run twice only when the scoped proxy is injected into another bean, not processing the scoped proxy instance itself otherwise at all. This is why it remained unnoticed in our tests. We need to consistently ignore the scoped proxy instance here, independent from the lifecycle and injection scenario.

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spring-projects-issues commented Aug 11, 2018

Juergen Hoeller commented

We consistently ignore ScopedObject and AopInfrastructureBean for @Scheduled and related post-processing now. This also optimizes annotation introspection along the lines of #21472 on the 5.1 line now, whereas the backports are going to be rather minimal.

Thanks for raising this! If you get the chance, please give the upcoming 5.1.0.BUILD-SNAPSHOT or 5.0.9.BUILD-SNAPSHOT a try...

@spring-projects-issues spring-projects-issues added type: bug A general bug status: backported An issue that has been backported to maintenance branches in: core Issues in core modules (aop, beans, core, context, expression) labels Jan 11, 2019
@spring-projects-issues spring-projects-issues added this to the 5.0.9 milestone Jan 11, 2019
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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 type: bug A general bug
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