I tried to use the Eclipse JST wizard to generate a web service. I kept getting the error:
java.lang.NoClassDefFoundError: javax/activation/DataSource
whenever during WSDL generation (or parsing). A Google search revealed that this is a very common problem -- see, for example, Eclipse Bugzilla 104993. I couldn't find a solution on the Web, but I discovered that if I added activation.jar from the JavaBean Activation Framework to my project build path, everything worked. I had to exit and re-enter Eclipse for the change to work. Also, I found that after I had run the wizard successfully once, it worked forever more (i.e. without having to add activation.jar to a project, and in following Eclipse sessions). Something is being cached somewhere.
