I'm trying to use an Updatesite.nsf to deploy jar to a test server. I can see it in this case the jdbc driver plugin at the server console using the http osgi ss command. But when I use it I get a java.lang.ClassNotFoundException com.mysql.jdbc.driver. What I'm missing or doing wrong. Thank you
The immediate answer is that the code that's calling Class.forName will need to have the MySQL driver in its classloader one way or another, which an XPage or in-NSF Java won't have by default.
To expand on it a bit:
If you're trying to call it from an XPage or Java code in an NSF, it would have to be part of an XPages Library from another plugin, which in turn depends on and re-exports the driver plugin.
If you're trying to call it from another plugin, that other plugin should have a Require-Bundle or Import-Package entry to bring it in.
The class will be available to NSFs by default if you plunk it in jvm/lib/ext, though that admittedly gives up the niceties of OSGi-based deployment.
The reason it works for the XPages JDBC support is that the wrapped plugins created by the wizard in Designer include a special extension point to provide the driver class to the ExtLib code that wants it, but they don't make it automatically available to XPages apps themselves.