Hi!
Bernard Olivier wrote:
>
> Hi everyboby and Merry Chistmas....
>
> Once again, I got a problem I'm hope you will solve.
>
> To test jboss and my lettle understanding about it I've made
> 1 session Bean which job is to take money from one
checking-account
> (a CMP) to another ( another CMP).
> The two CMPs are linked to a database on Oracle 7.
>
> I'm on windows NT4 sp6 with 192mb of ram and a 733mhtz processor.
>
> All was fine with my client application until I tried to test the
> reaction
> of Jboss with many clients : I've done a little program who made
20
> new threads
> (to simulate 20 clients of the session-bean )and each time I
> randomly take money
> 20 times from one checking-account (of 10) to another(of 10 too).
> I've got no problem for 10 threads, but many times ,with 20
threads,
> (1 for 2) my program stops: "Uc utilisation" falls to 0% allthough
> the program is not finished.
> After a while I got these messages on Jboss:
>
> [Container Factory]Transaction XidImpl [ID=257, Global=f05-cltdev/1916,
> Branch=] timed out. status=STATUS_ACTIVE
>
> others till cltdev/ ->1954
Sounds like a classical deadlock to me. The usual principles apply (lots
of books cover this topic).
What do you mean ?
Where did I mess, and what do I have to do ( or read, or perhaps
understand.... :( )
to make my application run better.
> and my program prints me accounts' balances of 0.00
> allthough they're not empty on my Database. :(
This is not right though. Is the sum of all accounts balances always the
same? (they should be)
/Rickard
Yes of course, it's just a test. ;)
I Hope, I'm not annoying you too much.
Olivier, beginner in Java programming
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