I have problems with Nepomuk and the indexing of my chosen folder including kmail. I cannot search for e-mails in kmail (shows no results) and indexing stops (inactive) after a while with no error message. I already deleted Nepomuks database and started re-indexing the folders, but indexing stopped again after a while. Testing Akonandi-Server gives me an error message: Nepomuk Query Server not available.
I found a thread in the KDE forums and one guy mentioned reinstalling the MySQL stake as a solution. I am a bit hesitant to do so, because I don't exactly how to reinstall all decencies and how this would actually effect my whole system.
Any thoughts on that?