EJB spec defines retry behavior, for example, in EJB3 Core Spec
18.4.2 Timer Expiration and Timeout Callback Method:

> If the transaction fails or is rolled back, the container must
> retry the timeout at least once.

This works with EJB2, but not EJB3.

In EJB2 this is done in the AbstractTxInterceptor#invoke() by
registering the Timer parameter as a TransactionSynchronization:

http://anonsvn.jboss.org/repos/jbossas/branches/JBPAPP_4_2_0_GA_CP/server/src/main/org/jboss/ejb/plugins/AbstractTxInterceptor.java

It seems the EJB3 impl doesn't have equivalent.