This is a tentative list of problems and errors that may occur in the archive
pipeline and hints on how to deal with them. When an error happens, it is better
to try to find out at once and correct it. But in case the latter turns
out to be difficult, it may be
possible to restart everything to try to ``see the error happening
again''.
WARNING: Before restarting any daemon it is a very good idea to have a look at the different directories to make sure that some files are not going to be messed up. For safety, it is also advised to take note of which files are being processed at that time, and to later make sure that they are eventually processed right.