@Schedule annotation and timeout in EJB bean

Question

What happens if I have @Scheduled task which runs every 5 seconds and sometimes it takes more than 5 seconds to complete this task? EJB container knows how to deal in such scenario or I need to care it by myself? Thank you.

PS My EJB bean annotated by @Startup and @Singleton, and I run it on Websphere 8.0

Answer 1

I think you are good because you bean is annotated with @Singleton . EJB beans are synchronized unless you explicitly mark methods with @Asynchronous . So if a cron execution(a thread) is in progress then other cron run(another thread) will have to wait for the first one to finish.