CMP Beans from Tables: Why does the Container try to create new tables?

Question

I'm trying to develop an EJB application using JDeveloper on 9iAS. I have several CMPs and have my tables that I want my CMPs to be based on already defined in my DB schema. I want to use CMP but I don't want the Container to create the tables, rather I want the Container to map my CMP EJBs to the already existing tables.
The issue is:
While creating these CMP EJBs in JDeveloper I chose the "New Enterprise Java Bean" EJB creation wizard using the option labeled "Container-managed Entity Beans from Tables". My assumption is that this does what I want, because the wizard prompts for a schema and table you want to map to. Then it creates the attributes & getter/setter methods, PK class, etc. all based on the table defintion automatically. Great. So why when I try to run my application do I get error messages for each EJB such as:
Auto-creating table: create table STREET_TYPE (PK_STYP_ID NUMBER(8), STREET_TYPE VARCHAR2(20), primary key (PK_STYP_ID, STREET_TYPE))
Warning: Error creating table: ORA-00955: name is already used by an existing object
Huh?? I thought the idea is that the CMP EJB is mapped to the existing table in my schema. Why is the Container trying to create new tables?? Is this possible? Or am I missing something fundamental about how Containers create and manage CMPs? Or is this just a JDevelop container issue? TIA

Answer 1

I presume you are getting the problem on application
deploy? This happens when upon initialization of the application using the built-in OC4J container/app server that is part of JDeveloper. Here is the full messaging:
[Starting OC4J using the following ports: HTTP=8989, RMI=23892, JMS=9228.]
C:\OraHome1\jdk\bin\javaw.exe -ojvm -classpath C:\OraHome1\j2ee\home\oc4j.jar com.evermind.server.OC4JServer -config C:\OraHome1\jdev\system\oc4j-config\server.xml
[waiting for the server to complete its initialization...]
Copying default deployment descriptor from archive at Q:\CBTCOF\COF_APPLICATION\COF_Project\classes/META-INF/orion-ejb-jar.xml to deployment directory C:\OraHome1\jdev\system\oc4j-config\application-deployments\current-workspace-app\classes...
Auto-deploying file:/Q:/CBTCOF/COF_APPLICATION/COF_Project/classes/ (No previous deployment found)...
Auto-creating table: create table STREET_TYPE (PK_STYP_ID NUMBER(8), STREET_TYPE VARCHAR2(20), primary key (PK_STYP_ID, STREET_TYPE))
Warning: Error creating table: ORA-00955: name is already used by an existing object
[...OTHER SIMILAR ERROR MESSAGES]
done.
Oracle9iAS (9.0.2.0.0) Containers for J2EE initialized
If so, in the application.xml file of you
OC4J instance the is a setting autocreate-tables,
which by default is true!
Set it to false as below and that should clear up
your problem.
<orion-application autocreate-tables="false"
default-data-Hmm. I found at least a dozen or so files with that name and set everyone that had this attriute to "false", restarted the OC4J server and still got these errors.