The transaction seems to hang in Jonas 2.0, if I rollback an empty
transaction. If I run a client program that rolls back an empty transaction
(e.g. the first operation inside the transaction throws an exception), the
subsequent runs wait until the JTM timeout occurs in EJBServer.
The problem does not occur if at least one operation on entity bean inside
the transaction is performed correctly (the operation does not throw an
exception).
Example code that hangs:
-- CUT --
UserTransaction utx = ...
MyEJBean1 b1 = ... // Entity bean
MyEJBean2 b2 = ... // Entity bean
try
{
utx.begin();
b1.substract(100); // the operation throws an exception
b2.add(100);
utx.commit();
}
catch(Exception e)
{
try
{
utx.rollback();
}
catch(Exception e)
{
}
}
--- CUT ---
The code works if I reorder the operations on b1 and b2:
-- CUT --
b2.add(100);
b1.substract(100); // the operation throws an exception
-- CUT --
This is an annoying feature/bug because it locks the associated beans until
the transaction times out. Thus, no operations on the beans cannot be
performed for a long time.
- Joonas Haapsaari
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