Transaction attributes must not be specified for the methods of a session bean�s home interface.
This is a very interesting question.
which three of the six transaction attributes are dangerous.??
In general, however, the Application Assembler
should avoid use of the NotSupported, Supports, and Never transaction attributes for
the methods of entity beans with container-managed persistence because it may lead to inconsistent
results or to the inconsistent and/or to the partial updating of persistent state and relationships
in the event of concurrent use.