We had this discussion a while ago (along with a lot of other samples issues). The results were summarized in the wiki status page: http://cwiki.apache.org/GMOxPMGT/geronimo-samples-212-release-work-items.html
Here's the thread where it was discussed: http://tiny.cc/uVkbL Joe Donald Woods wrote:
Seems that only one of the samples has the tomcat/jetty prerequisite set. Why? Shouldn't we include this setting so the Plugin portlet will only allow the appropriate samples to be installed?-Donald
