Spring @Scheduled tasks running in SimpleAsyncTaskScheduler are interrupted immediately on context close

Spring 6.2.9

When Spring Boot auto-configures a SimpleAsyncTaskScheduler (with virtual threads enabled) to be used for running @Scheduled tasks, closing the application context will immediately interrupt the threads executing those tasks. I was expecting the taskTerminationTimeout to be respected before hard-killing running tasks.

The offending code is here (calling Future.cancel with true): https://github.com/spring-projects/spring-framework/blob/09a5ca3e747af3dacd2bbb42ae4f356db26b57d3/spring-context/src/main/java/org/springframework/scheduling/concurrent/SimpleAsyncTaskScheduler.java#L397-L401 and here (explicitly calling Thread.interrupt(), not allowing graceful completion): https://github.com/spring-projects/spring-framework/blob/09a5ca3e747af3dacd2bbb42ae4f356db26b57d3/spring-core/src/main/java/org/springframework/core/task/SimpleAsyncTaskExecutor.java#L362-L380 Note how running threads are interrupted immediately, and then we wait for them to finish their work.

A similar issue was fixed in the past (#31019), but the fix made there doesn't help if the underlying TaskExecutor is itself also interrupting threads.

The end result is that scheduled tasks currently waiting for the database or some other service will be interrupted and fail immediately, thus preventing graceful shutdown and making the taskTerminationTimeout almost useless.