Migrate your applications that use Version 4 data sources, or data sources (WebSphere Application Server V4), to use data sources that support more advanced connection management features, such as connection sharing.
To use the connection management infrastructure in WebSphere Application Server Version 6.x, you must package your application as a J2EE 1.3 (or later) application. This process involves repackaging your Web modules to the 2.3 specification and your EJB modules to the 2.1 specification before installing them onto WebSphere Application Server.
Applications
left at the J2EE 1.2 level will continue to run fine using the connection
management support that was available at V4.0; simply create the JDBC provider
and data source, and install the 4.0 application as-is. If you choose to repackage
your application for version 6.0 or above you can not use a Version 4.0 data
source. You must use the other data source option, which supports applications
coded to the J2EE 1.3 specifications, at minimum.
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