Spring Relation between @Scheduled and task executors

Affects: All versions

Please document the relation between @Scheduled annotation and task executors. There is no information if @Scheduled is using org.springframework.scheduling.commonj.WorkManagerTaskExecutor. In a web container environment this could lead to unwanted unmanged threads.

EDIT: I think this only affects Java EE 6 environments. For Java EE 7 you can configure the SchedulerExecutorService provided by the container. Is far as I understood this mechanism replaces task executors.

Please see this SO thread: https://stackoverflow.com/q/68862606/395879

Comment From: snicoll

There is no information if @Scheduled is using org.springframework.scheduling.commonj.WorkManagerTaskExecutor

I am not sure I understand what you'd like to see added in the documentation. The relevant section provides an introduction to the TaskExecutor abstraction and how you can use it. There is also a section to enable task scheduling and the Javadoc of @EnableScheduling that states:

By default, Spring will search for an associated scheduler definition: either a unique org.springframework.scheduling.TaskScheduler bean in the context, or a TaskScheduler bean named "taskScheduler" otherwise; the same lookup will also be performed for a java.util.concurrent.ScheduledExecutorService bean. If neither of the two is resolvable, a local single-threaded default scheduler will be created and used within the registrar.

I believe this is covered properly. If you feel differently please provide more details and we can reconsider.