Can't call method "setArchivist" on an undefined value

This is what i get from my foswiki website:

Foswiki detected an internal error - please check your Foswiki logs and webserver logs for more information.

Foswiki error log:

Can't call method "setArchivist" on an undefined value at /var/lib/foswiki/lib/Foswiki/Contrib/DBCacheContrib/Archivist/Storable.pm line 38.

Apache error log:

mod_fcgid: stderr: Can't call method "setArchivist" on an undefined value at /var/lib/foswiki/lib/Foswiki/Contrib/DBCacheContrib/Archivist/Storable.pm line 38.

I got the same exact error. It came in the middle of a day, I don't know for sure but I guess something got corrupt in the DBCache somewhere. Anyway I tried to change DBCacheContrib to use BDB but then got the same issue as Tasks.Item9118. I was using FastCGI at the moment because I thought for a moment it was mod_fcgid related.

After much time scratching my head I cleared the working/work_areas/DBCacheContrib as described by MichaelDaum in the Tasks.Item9118 and switched back to my original mod_fcgid, and voila! I'm still not sure what the actual cause was.

-- LarsEik - 23 Jan 2011