Hi! Good news. With (lots of) Dain's help, I finally got my example working. We did, however, find what appears to be a bug and a workaround for it.
I specify two <Resource> mappings in my openejb.xml file, which look like this: <Resource id="myDataSource" type="DataSource"> JdbcDriver com.mysql.jdbc.Driver JdbcUrl jdbc:mysql://localhost/corm UserName root Password n00p455wyrd JtaManaged true </Resource> <Resource id="myNonJtaDataSource" type="DataSource"> JdbcDrive com.mysql.jdbc.Driver JdbcUrl jdbc:mysql://localhost/corm UserName root Password n00p455wyrd JtaManaged false </Resource> Then, in my persistence.xml file I reference these mappings, like so: <jta-data-source>java:openejb/Resource/myDataSource</jta-data-source> <non-jta-data-source>java:openejb/Resource/myNonJtaDataSource</non-jta-data-source> Now, this all looks normal thus far, but when I boot Tomcat, my openejb logs tell me the following: ... 2007-12-22 18:37:20,636 - INFO - Configuring Service(id=myDataSource, type=Resource, provider-id=Default JDBC Database) 2007-12-22 18:37:20,638 - INFO - Configuring Service(id=myNonJtaDataSource, type=Resource, provider-id=Default JDBC Database) ... This seems to indicate that the two resources are getting automatically pointed at the Default JDBC Database. On further inspection, it turns out that the Default JDBC Database and Default Unmanaged JDBC Database is listed as a <Connector> elements. Dain's writing more information about this in another thread on the dev list. I think that if the resources are going to get pointed elsewhere, that should be obvious, or loudly noted somewhere. I ended up filtering down the logs with apple's log viewer to find that reassignment. Never would have found it otherwise. So, I switched the Default JDBC Database <Connector> to a <Resource> and changed its internals to point at MySQL instead of HSQLDB: <Resource id="Default JDBC Database" > JdbcDriver com.mysql.jdbc.Driver JdbcUrl jdbc:mysql://localhost/corm UserName root Password n00p455wyrd JtaManaged true </Resource> And, for consistency, the unmanaged version: <Resource id="Default Unmanaged JDBC Database"> JdbcDriver com.mysql.jdbc.Driver JdbcUrl jdbc:mysql://localhost/corm UserName root Password n00p455wyrd JtaManaged false </Resource> Finally, I switch the persistence.xml to read: <jta-data-source>java:openejb/Resource/Default JDBC Database</jta-data-source> <non-jta-data-source>java:openejb/Resource/Default Unmanaged JDBC Database</non-jta-data-source> And now, the app is pointing at the MySQL DataSource correctly. Thanks, guys! -- Alexander R. Saint Croix