"size overflows bitmaps" error

[Jon Harley]

Russ Allbery wrote:

> 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

> 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?

I can tell you that it's not to do with the cycbuff rolling over:

Mar 30 11:16:36 wisteria nnrpd[22947]: CNFS-sm: size overflows bitmaps @0302686F6C6C616E6400000137E30000000207000068826802440000@ holland:0x4d83800:0x26fcc00:0x26fd000: 2175

news at wisteria: splittoken.pl 
@0302686F6C6C616E6400000137E30000000207000068826802440000@
@0302686F6C6C616E6400000137E30000000207000068826802440000@ type=cnfs class=2 over=7 offset=6882 overlen=6802 cancelled=68 buffer=holland offset=26fc600 cycnum=2
news at wisteria: cnfsstat
Class warwick  for groups matching "uwarwick*"
 Buffer holland, len: 101.23 Mbytes, used: 77.51 Mbytes (76.6%)   1 cycles
  Newest: 2000-03-30 10:05:00,    0 days,  1:13:54 ago

In other words that's an article from not long ago in the current cycle.

When this error occurs, the user is refused access to recent articles
which should be present, and remain present in uniover and the overview
indexes - expire doesn't remove them.

So this is NOT a harmless warning, it's indicating a real problem which
my users are complaining about!

If this is due to a bug I hope I have provided enough information to
help fix it, if not let me know.


Jon
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