Repeatable svnsync failure on a particular revision

Hello,

I'm using svnsync to back up a repository between two Windows 2003
machines running "Apache/2.2.4 (Win32) SVN/1.4.3 DAV/2
mod_auth_sspi/1.0.4 mod_ssl/2.2.4 OpenSSL/0.9.8e".

This failed for me on a revision yesterday, giving the message

svnsync: REPORT request failed on 'http://source-machine/svn/imp'
svnsync: REPORT of 'http://source-machine/svn/imp': Could not read response body: An existing connection was forcibly closed by the remote host. (http://source-machine)

The interesting aspect is that this failure was repeatable, and always
occurred at the same point. When I looked at the transactions folder on
the destination machine, I could see the size of the 'rev' file
increasing as svnsync ran, but it always failed when rev got to 47971744
bytes. (For context, the size of the incremental dump file for that
revision is 56085661 bytes).

In the Apache server log on the source machine, I see in each case a lot
of PROPFINDs from the destination machine, finishing with:

10.1.8.1 - project-svnowner [06/Feb/2008:15:21:07 +0000] "REPORT http://source-machine/svn/imp HTTP/1.1" 200 68622428

with a timestamp approximately seven minutes before the last update to
the 'rev' file. I guess this is the failing request.

I don't think it's the size of the revision that is the problem - I've
successfully used svnsync to transfer bigger ones anyway.

This is a critical server and backup for me, so I've had to manually
work around the problem now (svnadmin dump / load of the problem
revision, followed by manual adjustment of the revision 0 revprops).
However, if anyone has experienced anything similar, or has a theory
about what the problem was, I'd like to hear it. I can also help
investigate if needed.

Regards,

--
Jon Ashley
This email is confidential and intended solely for the use of the individual to whom it is addressed. If you are not the intended recipient, be advised that you have received this email in error and that any use, disclosure, copying or distribution or any action taken or omitted to be taken in reliance on it is strictly prohibited. If you have received this email in error please contact the sender. Any views or opinions presented in this email are solely those of the author and do not necessarily represent those of Praxis. 
Although this email and any attachments are believed to be free of any virus or other defect, no responsibility is accepted by Praxis or any of its associated companies for any loss or damage arising in any way from the receipt or use thereof. The IT Department at Praxis can be contacted at it.support_at_praxis-his.com.
Praxis High Integrity Systems Ltd:
Company Number: 3302507, registered in England and Wales
Registered Address: 20 Manvers Street, Bath. BA1 1PX
VAT Registered in Great Britain: 682635707
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe_at_subversion.tigris.org
For additional commands, e-mail: users-help_at_subversion.tigris.org