"size overflows bitmaps" error

[Russ Allbery]

Jon Harley <cudce at csv.warwick.ac.uk> writes:

> I'm getting thousands of error messages from nnrpd in news.err like this:

> nnrpd[1406]: CNFS-sm: size overflows bitmaps @0302686F6C6C616E64000001D6F6000000020700047BA7F101070000@ holland:0x45b6400:0x3adee00:0x3adf400: 1843

> holland is the name of one CNFS cycbuff, but the errors aren't just all
> in one cycbuff, they're in two or three out of twelve. 1843 is the size
> as recorded in uniover.

> We're running INN 2.2.1 on Solaris 7 with cycbuffs (<2MB size) on
> raw disk partitions.

> Anyone know what the error message means?

My understanding is that this can happen when a cycbuff rolls over and
that it's not a serious problem, but after looking at that code, I can't
understand what exactly it's trying to do.  If this warning is really
harmless, I'd like to suppress it if we can detect that it's harmless.
Could someone more familiar with this part of the code fill me in on
what's going on?

-- 
Russ Allbery (rra at stanford.edu)             <http://www.eyrie.org/~eagle/>