Timer Service in ejb 3.1 - schedule calling timeout issue

Question

I have created simple example with @Singleton, @Schedule and @Timeout annotations to try if they would solve my problem.

The scenario is this: EJB calls \'check\' fu

Answer 1

The default @ConcurrencyManagement for singletons is ConcurrencyManagementType.CONTAINER with default @Lock of LockType.WRITE. Basically, that means every method (including generateReports) is effectively marked with the synchronized keyword, which means that checkQueueState will block while generateReport is running.

Consider using ConcurrencyManagement(ConcurrencyManagementType.BEAN) or @Lock(LockType.READ). If neither suggestion helps, I suspect you've found a Glassfish bug.

As an aside, you probably want persistent=false since you probably don't need to guarantee that the checkQueueState method fires every 5 seconds even when your server is offline. In other words, you probably don't need the container to fire "catch ups" when you bring your server back online.