[where did this WARN come from?]

I am working with jasperreport and struts2, it is working well, but I got this message in server log:

WARN (net.sf.jasperreports.engine.export.GenericElementHandlerEnviroment:149) - Found two generic element handler bundles for namespace http://jasperreports.sourceforge.net/jasperreports

what do I have to do to wipe off this WARN?

[How struts2-jasperreports-plugin close the jdbc connection?]

I have been working with struts2 and jasper report, and by following the document--"Apache Struts2 Documentation Jasper Reports Plugin(http://struts.apache.org/release/2.1.x/docs/jasperreports-plugin.html)"--I have succeeded to use the jdbc connection as data source to generate a report, but I encountered a problem, the jdbc connection cannot be closed manually in the action class, and not closed automatically by also.

What can I do about that? Do I have to alter the source code of to achieve that?

Thanks!