cvsupd : TreeComp failed: Network write failure: Connection closed

[Dan Langille]

I am seeing this message frequently in /var/log/cvsupd.log on 
cvsup.nz.freebsd.org but I don't know what it causing it:

Jun 14 00:10:10 cvsup cvsupd[60286]: +801 user at example.org 
[SNAP_16_1e/17.0]
Jun 14 00:24:44 cvsup cvsupd[60286]: =801 [2968Kin+1243Kout] src-
all/cvs
cvsup cvsupd[60286]: -801 [2968Kin+1243Kout] TreeComp failed: Network 
write failure: Connection closed

It does not occur on all client connections, but regularly enough for 
me to be concerned.  Any ideas?
-- 
Dan Langille : http://www.langille.org/