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)...
so I'm guessing it has something to do with that revision or the next
revision (8411).

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]

I checked the master repository and the path shown in the 'Could not
CHECKOUT resource' message does not exist at revision 8410. It was added
at revision 8411.

I checked out the entire repository (from the master) at revision 8410 and
it worked fine. I checkout the entire repository at revision 8411, it
also works fine. And if I just checkout the path it's talking about at
revision 8411 that works fine as well.

I've run "svnadmin verify" on both the master and the mirror and there are
no errors on either side. Obviously, the last revision in the mirror is
8410, whereas the last revision in the master is 8502.

Does anyone know what this error really means?

Any suggestions how to figure out what the problem is?

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.

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Received on 2009-05-07 03:46:56 CEST