Since ages we have the problem that from time to time the different build triggers ("Build after other projects are built" and "Build other projects") vanish for some jobs, leaving us in a situation where necessary downstream projects aren't triggered at all. This condition is sometimes really hard to track down and developers do not receive emails about errors they generated etc.

There is nothing we can correlate to the points in time this happens and the jobs that are affected. It seems this randomly appears for some jobs. The one thing that might be of interest is that basically all our jobs are matrix projects.

If there is anything I can do to give you more debug output, please indicate me what to do.