Why do I get a StaleConnectionException while using WebSphere 4.0 and Toolboxs AS400JDBCConnectionPoolDataSource?
There are several different reasons for this error. First of all, make sure you have v5r1 JACL PTF #SI02886 (SS03 PTF #SI03548) for Toolbox or at least JTOpen version 3.0. This PTF level updates the Toolbox JDBC driver to fully support the JDBC 2.x features used by WAS 4.0. Older versions of Toolbox may cause StaleConnectionExceptions or incorrectly report network errors causing function sequence errors.