10g 10.1.2.0.2 MouseWheelListener.class

Question

Hi,
We're eagerly adopting the 10g 10.1.2.0.2 release of Forms and Reports services, and while browsing the error_log (yay, what fun :) ) I noticed this error messsage:
File does not exist: ORACLE_HOME/forms/java/java/awt/event/MouseWheelListener.class
So what's the deal? Can I download the class from somewhere and perhaps get some sort of mouse wheel support in forms and reports 10g - or is this merely a provision for "things to come"?
I must admit it's the most interesting error I've had in a long time :)
Jesper Vad Kristensen
Denmark

Answer 1

The blog entry mentioned above is mine. It's been raised as an high priority issue with Oracle, but so far they haven't fixed it yet.
The decrease in performance we found was a combination of this missing class file, use of a proxy server and use of SSL. Using SSL makes your JVM at the client raise an unhandled exception. You can see this if you open the Java console. On low end machines (Celeron 300-600MHz) this caused a considerable drop in performance.
The other mousewheel-classes were not in 9.0.4.1. It looks like Oracle introduced these classes in 9.0.4.2 but forgot one. This was also logged internally at Oracle as a bug against a pre-release version of 10.x. That was fixed in the final 10.1.2 release, but no backport fix has been made for 9.0.4.2. That is what I have requested and what Oracle is working on.
In the meantime I've just extracted the frmall.jar from 10.1.2 myself and added the single class file to the 9.0.4.2 frm90.all. That completely fixed the issue and is probably exactly what Oracle will be doing once hey supply the backport fix. Until then we are just taking our chances by running with a non-supported JAR file. If we do run into any problems, support might ask us to reproduce first with the standard JAR file. That's a risk I'm willing to take.