Dear Miroslav

By an odd coincidence I was experiencing just the same
problem you describe, also using Interbase.

My idea was to use an entity bean (one instance giving one
sequence of numbers) with a transaction attribute of
NotSupported, and have the bean persist itself every few
seconds (or at shutdown) using the passivation timeout
attribute.  This eliminates the problem of reading the old
used serial number value from another transaction due to
transactional isolation.  I have a similar multi-thread test
program to you, and it worked fine... until it came to
persisting the value, and then Jonas always throws an
exception.  My post of earlier today explains more.  If I
could get over this exception being thrown, I would have a
solution to this problem.

Regards,


Robert P Parlett
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