Hi,

I am using Jboss 4.0.2 and encountering the same No ManagedConnections 
exception after the blocking timeout  which I believe leads to Transaction 
Timeout and Transaction Rollback exception -  

Conn-pool configurations are 

Min-pool-Size = 10
Max-pool-Size = 80
Blocking timeout = 30000 ms

stateless session bean configurations are as follows : 

Max Bean instance pool size = 80

There does not seem to be any connection leaks in the application.

I have also tried adding strictMaximumSize in the session beans dd so as to 
restrict the concurrent beans accessing the connection pool but that does not 
solve the problem.

The expected load on application is somewhere around 300 concurrent threads 
(atmost).

Will altering of Basic Thread pool configurations help?

Are there any other configurations which I might be missing or have 
misconfigured?

Awaiting reply???

Regards,
sauser


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