Hi,

> several days I spend with trying to create the connection to
> Firebird 1.0.0.338 from Sun Java System Application server. When I
> try to get the connection from data source, I receive this error
> message:
>
> Connection could not be allocated because: Resource Exception.
> unrecognized database parameter block Reason: unrecognized database
> parameter block

Why do you specify tpbMapping parameter to be "1"? It is the resource
bundle name with TPB mappings. Also idleTimeout and
idleTimeoutInMinutes are the same property that uses different time
units. Only one is needed. Also, check if you have role called "USER",
otherwise remove this property.

> when I remove the conf. parameter MinSize or set it to 0. I obtain
> this error message:
>
> Target exception message: Connection could not be allocated because:
> Could not obtain connection during blocking timeout (5000 ms)
>
> is there any way to find the reason of the timeout above ?

Because it could not obtain connection because of the previous reason.
I will add logging into the warn level of log4j.

Roman