Justin Georgeson wrote on Tue, Aug 03, 2010 at 10:03:21 -0500:
> Regarding reproducibility, that's what I was going for with #3. I found
> another thread, http://svn.haxx.se/users/archive-2009-06/0723.shtml,
> concluding this error is due to fsfsverify not being current with the latest
> format, so I'll give the svndump to new repo and redo revision in new repo a
> try.
> 

The script doesn't check the format of the fsfs filesystem it's opening.
Oops.

Which fsfs formats/features does fsfsverify.py not support?  (is that
documented somewhere?  I couldn't find docs about this in the script
itself.)

> -----Original Message-----
> From: Daniel Shahaf [mailto:d...@daniel.shahaf.name] 
> Sent: Tuesday, August 03, 2010 9:30 AM
> To: Justin Georgeson
> Cc: users@subversion.apache.org
> Subject: Re: corrupt revision, "Reading one svndiff window read beyond the 
> end of the representation"
> 
> Justin Georgeson wrote on Mon, Aug 02, 2010 at 17:39:49 -0500:
> > I have a repo with >39k revisions. Last week, r39245 was committed, a merge 
> > of a single file from trunk to branch. It is the HEAD revision of that file 
> > on that branch. Turns out this revision is corrupt
> > 
> > [svnad...@hourdcm3 ~]$ svnadmin verify -r 39245 /repos/prowess
> > svnadmin: Reading one svndiff window read beyond the end of the 
> > representation
> > 
> 
> Is this reproducible?  i.e., if you re-commit r39245 (on top of, say, an
> svnsync/backup repository at r39244), does it become corrupted again?
> 
> > I've searched from r30000 to HEAD in this repo and that's the only rev that 
> > fails the verify. All our backup copies have the same issue too. I'm 
> > wondering what our options for recovery are. Some suggestions we have come 
> > up with internally are:
> > 
> > 1. Developer still has sandbox which reports the parent folder as updated, 
> > so have him 'svn cat' the previous version and commit that, then re-commit 
> > the changes from the corrupt revision
> > 2. 'svn rm' the file from the server and re-add it (losing ancestry)
> > 3. Some combination of svndump up to that revision, import to new repo, 
> > redo that merge in new repo, overwrite the revision file with new one
> > 4. delete revision file (seems like bad idea)
> > 5. svn dump up to corrupt revision and everything after bad revision, merge 
> > dumps, create new repo, redo merge
> > 
> 
> Don't do #4.
> 
> #5 sounds reasonable.  You have to restitch history in some way now.
> 
> > Is there something else we missed? Which of these seems like the 
> > safest/easiest?
> > 
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