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 the application server, you must package your application as a Java EE 1.3 or later application. This process involves repackaging your Web modules to the 2.3 or later specification and your enterprise JavaBeans (EJB) modules to the 2.1 or later specification before installing them onto WebSphere Application Server.
Applications left at the Java EE 1.2 level continue to run fine using the connection management support that was available at V4.0; simply create the Java Database Connectivity (JDBC0 provider and data source, and install the 4.0 application as-is. If you choose to repackage your application for version 6.0 or later versions, you can not use a Version 4.0 data source. You must use the other data source option, which supports applications coded to the Java EE 1.3 specifications, at minimum.
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