Are scheduler tasks still active when ShutdownEvent is fired

[bulldog98]

I have a function like so

void onShutdown(final @Observes ShutdownEvent ev) {
    // cleanly close some communication
}

And I have a scheduler that updates the communication periodically.

My Question can the scheduled task (function) still be called while the onShutdown is already executed?

[quarkus-bot[bot]]

/cc @mkouba (scheduler)

[mkouba]

Nope, this is not guaranteed.

In general, the ShutdownEvent is fired before the CDI container (ArC) is shut down so that a bean can observe this event and the scheduler (either the impl from quarkus-scheduler or from quarkus-quartz) is shut down after the CDI application/singleton contexts are destroyed. Moreover, a scheduled task can be running during the shutdown.

Finally, if the quarkus.quartz.shutdown-wait-time config property is set to a non-zero value, then Quarkus will attempt to wait for all running jobs to finish (quarkus-quartz only).