JCA / JDBC Configured for non-XA Attempting XA Transaction Commit

I am attempting to create simple BPEL SOA composites in SOA 11.1.1.5 that use a DbAdapter to execute a stored procedure in an 11g database. The database task being performed only involves a single database and does not require transaction support. I have carefully stepped through the creation of the DataSource and JCA pointing through the DbAdapter to the JDBC DataSource so XA transaction support is disabled, the JCA pool sets the transaction mode to "No transaction" and the JCA pool uses the dataSource value to point to the JNDI name of the JDBC pool rather than the xADataSource value.
Visually,
DataSource definition:
name = jdbc/myserviceDataSource
driver = oracle.jdbc.xa.client.OracleXADataSource
url = jdbc:oracle:thin:@mydbhost.myfirm.com:1521:GENERIC
use XA DataSource = unchecked
set XA timeout = unchecked
Keep XA connection until transaction complete = checked
keep connection after local transaction = checked
JCA definition:
name = eis/DB/myserviceDataSource
dataSourceName = jdbc/myserviceDataSource
xADataSourceName = (blank)
platform class name = org.eclipse.persistence.platform.database.Oracle10Platform
Transaction | Transaction Support: no transaction
This configuration works on one sandbox server and I got it working in a second sandbox server. However, after deleting the JDBC and JCA pools to go through the process one more time to document the procedure on the second server, I am unable to get the configuration working again. The WebLogic domain appears to be resurrecting portions of an old configuration that still references the JNDI name of the JDBC pool in the xADataSourceName parameter. I have unpacked the DbAdapter.rar archive for the DbAdapter and verified the contents of the ./META-INF/weblogic-ra.xml file don't use the xADataSouceName parameter. The Deployment Plan for the DbAdapter (named DbAdapterPlan.xml in $SOA_HOME/soa/connectors ) also explicitly configures the JCA pool using the dataSourceName value leaving the xADataSourceName value blank.
However, executing the SOA service using this JCA connection results in this error:
java.sql.SQLException: Cannot call Connection.commit in distributed transaction.
Again, I know the theoretical answer to this question is to disable transactions in the JCA and JDBC configurations and don't use the xADataSourceName element of the JCA configuration to point to the JDBC pool. However, after validating those elements and restarting the pools or performing an Update on the DbAdapter deployment, WebLogic seems to still create connections through the JDBC pool with transactions enabled.
Any suggestions?
Should I just completely undeploy the DbAdapter and redeploy it from the SOA binary installation directory? These are just lab machines right now so that's obviously not a good long term answer for production use but may help start over with refining a better procedure for doing this.

You should use a non-xa driver for your data source...
From the weblogic docs...
Configure Transaction Options
When you configure a JDBC data source using the Administration Console, WebLogic Server automatically selects specific transaction options based on the type of JDBC driver:
For XA drivers, the system automatically selects the Two-Phase Commit protocol for global transaction processing.
For non-XA drivers, local transactions are supported by definition, and WebLogic Server offers the following options ...
http://docs.oracle.com/cd/E23943_01/web.1111/e13737/jdbc_datasources.htm#autoId8
Cheers,
Vlad

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