OC4J cannot access 9iDB 901

Question

RDBMS Version: 9.0.1
Operating System and Version: Solaris 7
Product (i.e., OAS, IAS, etc): 9iAS 1022 Core
Product Version: 1.0.2.2 Core
JDK Version: 1.2.2_07
Error number:
OC4J cannot access 9iDB 901
Hi All,
I have installed 9iAS1022 Core connected with 9iDB 9.0.1.
I have tried to deploy the petstore demo to the OC4J. But it was failed and prompt either "unable connect to database" or "populateServlet Error". I can connect OK using 8.1.7 database.
What I have missed on such case??
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Answer 1

I have tested the jdbc driver with the jdbc sample, it is fine. And also, I have created estoreuser account and grant connect, resource and create session to such user. sqlplus can connect it fine.
Why petstore can access 817DB, but can't with the 9iDB?
When I click the "Enter the store" it prompt
PopulateServlet Error:
java.lang.NullPointerException java.lang.NullPointerException at com.sun.j2ee.blueprints.tools.populate.web.PopulateServlet.checkTables(Compiled Code) at com.sun.j2ee.blueprints.tools.populate.web.PopulateServlet.doGet(Compiled Code) at javax.servlet.http.HttpServlet.service(HttpServlet.java:195) at javax.servlet.http.HttpServlet.service(HttpServlet.java:309) at javax.servlet.http.HttpServlet.service(HttpServlet.java:336) at com.evermind.server.http.ServletRequestDispatcher.invoke(Compiled Code) at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:170) at com.evermind.server.http.HttpRequestHandler.processRequest(Compiled Code) at com.evermind.server.http.HttpRequestHandler.run(Compiled Code) at com.evermind.util.ThreadPoolThread.run(Compiled Code)
Does anyone know??
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