The jbpm3 jobs form a matrix with three axes: jdk, container and database. The jdk and container axes are merged together in order to cover the most ground with the least configurations.
|sun 1.4.2||jboss 4.0.5|
|sun 1.5.0||jboss 4.2.3|
|sun 1.6.0||jboss 5.0.1|
The database axis is arranged as a vector to allow for parallel testing; each jdk-appserver couple is executed against each configured database. This organization is quite effective: each job takes only 25-30 min to run.
Hope this new stream of information will tickle your curiosity about the engineering aspects of the project.