Oracle SOA 11g TP3 - Tutorial problem

Question

Hello!
I am quite new to this whole platform, and while I was following the First step of the tutorial, I ran into a problem, which I have no idea how to solve.
(this tutorial: http://download.oracle.com/otndocs/products/soa/105-end2end-PO-Processing.zip )
As it said I installed the prerequisites,
an Oracle database,
Oracle Database 10g Express Edition Release 10.2.0.1.0 - Product
PL/SQL Release 10.2.0.1.0 - Production
CORE 10.2.0.1.0 Production
TNS for 32-bit Windows: Version 10.2.0.1.0 - Production
NLSRTL Version 10.2.0.1.0 - Production
the Oracle SOA Suite 11g TP3,
as well as jDeveloper 11.1.1.0.0
After I successfully created and successfully deployed the 'CreditCardValidation Application' following the steps in 105-end2end-PO-Processing_2.pdf (part of the zip, but it's basically a database adapter a mediator and an exposed web service packed together) and I tried to test it, i got this error:
<env:Envelope
xmlns:env="http://schemas.xmlsoap.org/soap/envelope/">
<env:Header/>
<env:Body>
<env:Fault>
<faultcode
xmlns="">env:Server</faultcode>
<faultstring
xmlns="">null: Exception occured when binding was invoked. Exception occured during invocation of JCA binding: "JCA Binding execute of Reference operation 'OracleXESelect' failed due to: Could not create/access the TopLink Session. This session is used to connect to the datastore. Caused by Exception [TOPLINK-4002] (Oracle TopLink - 11g Technology Preview 3 (11.1.1.0.0) (Build 071207)): oracle.toplink.exceptions.DatabaseException Internal Exception: java.sql.SQLException: No suitable driver Error Code: 0. ". The invoked JCA adapter raised a resource exception. Please examine the above error message carefully to determine a resolution. </faultstring>
<faultactor
xmlns=""/>
<detail
xmlns="">
<exception/>
</detail>
</env:Fault>
</env:Body>
</env:Envelope>
If I understand it correctly, the core of the problem is this:
java.sql.SQLException: No suitable driver Error Code: 0.
now if this is the problem, how to solve it?
Ideally I would start by looking at the configurations of Toplink, but I didn't install Toplink, as such I have no idea where these options are.. (Is it part of the database in this current configuration?)
Thanks in advance!
Mike

Answer 1

Actually, the tutorial works fine in this version, all the way through. Specifically, the database adapter is working.
The problem you are having has been discussed on this forum. You should do this:
sqlplus sys/system@XE as sysdba
SQL> show parameter session
SQL> show parameter processes
SQL> alter system set sessions=100 scope=spfile;
SQL> alter system set processes=150 scope=spfile;
SQL> shutdown immediate
SQL> startup
SQL> show parameter session
And restart your server. That should fix it. Some people have also restarted Windows.
Heidi.