Description of problem:
rsync server (--daemon) with "transfer logging = yes" generates protocol errors:
rsync error: error in rsync protocol data stream (code 12) at io.c(808)

This makes running an rsync server with logging enabled unreliable.


Version-Release number of selected component (if applicable):
rsync-2.6.8-1.FC5.1

How reproducible:
very, with enough files to transfer.

Steps to Reproduce:
all on rsync server:
1.  chkconfig xinetd on; chkconfig rsync on
2.  configure /etc/rsyncd.conf to permit uploading; - here's a simple sample

use chroot = false
log file = /var/log/rsyncd.log
transfer logging = true
hosts allow = 129.6.80.0/24 129.6.88.0/24 132.163.129.0/24 132.163.229.0/24

[HEV]
path = /var/tmp/HEV/
comment = "High End Visualization (HEV) Distribution"
read only = false


3.  rsync -aH  /usr/share/doc server::HEV
  
Actual results:
(ignore "failed to open...permission denied" messages)

unexpected tag 3 [sender]
rsync error: error in rsync protocol data stream (code 12) at io.c(808)


Expected results:
no messages, no aborts

Additional info:

-H (retain hard links) makes the problem appear more frequently.

rsync mailing list thread at
http://www.mail-archive.com/rsync@lists.samba.org/msg16204.html
Patch (in same thread) at: 
http://www.mail-archive.com/rsync@lists.samba.org/msg16405.html

Applying the patch to fc5 rsync package fixed it for me.