Some customers have encountered the following error when running Flux in Websphere 5 and Oracle 9: J2CA0081E: Method cleanup failed while trying to execute method cleanup on ManagedConnection

There is a known bug between Oracle 9i andWebsphere 5.

Try upgrading your Oracle driver to the latest (preferable 10g or 9.2.0.3 or higher). You can find the latest Oracle drivers at:
http://www.oracle.com/technology/software/tech/java/sqlj_jdbc/index.html.