svnsync fails with cryptic message

I'm trying to do an initial svnsync of a 4Gb repository with 8500+
revisions, but it fails with the following error:

   ...
   Committed revision 8410.
   revision 8410
   Copied properties for revision 8410.
   property 8410
   svnsync: Unable to fetch the node revision id of the version resource within the revision.

It leaves a lock and I need to propdel svn:sync-lock before I can try the
sync again, but the sync fails right away with the same error.

I've re-created the destination repo and re-tried the sync from the start
4 times and all 4 times it stopped just after the same revision (8410).

The Apache error log on the remote mirror shows this:

   Could not CHECKOUT resource /path/to/repo/!svn/ver/8410/path/to/directory/in/repository. [409, #0]
   Unable to fetch the node revision id of the version resource within the revision. [409, #160013]

The odd part is the path in the error message doesn't exist at revision
8410, it was added at revision 8411 (via a tag/copy).

I can checkout the entire repository (from the master) at revision 8410
and revision 8411 and it works fine in both cases.

I've run "svnadmin verify" on both the master and the mirror and there are
no errors on either side.

Is this a bug in 1.5.5? Or is the repository corrupted somehow that
isn't detectable by verify?

PS. Both systems are using subversion 1.5.5 and the destination (mirror)
repository is running apache 2.2.6. The repository type is fsfs on both
sides.

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http://subversion.tigris.org/ds/viewMessage.do?dsForumId=462&dsMessageId=2174274
Received on 2009-05-11 03:43:01 CEST