Hi,
Andersen, Krista [mailto:Krista.Andersen_at_itg.com] wrote:
> Twice I have seen one of my proxy repositories become corrupted due
> to an apparent bug in the svnsync sync process. Has anyone else
> seen this type of behavior from Subversion?
This is probably caused by issue 3546 [1][2]. This is a race
condition - if you have several sync processes running at the same
time then the mirror can get corrupted. You had three commits which
were 1 second apart, so your hook script started 3 copies of svnsync
within 2 seconds. I think this is the first practical report of this
bug; previous discussion was theoretical.
> Here is a comparison the output of the svn log -v for the offending
> revisions (324,325) on both the corrupted and non-corrupted proxy
> repo.
It looks like rev 323 got mirrored twice (as mirror revs 323 and 324),
then rev 324 was mirrored (as mirror rev 325).
> I am a bit concerned about the stability of Subversion since this
> is the second time in two months that I have had to fix this issue.
> Is there a patch or something to prevent this in the future?
Suggested workaround: Change your hook scripts to use the lockf or
lockfile tools[3] to ensure that only one instance of svnsync runs
at once.
Kind regards,
Jon
[1]
http://mail-archives.apache.org/mod_mbox/subversion-dev/200911.mbox/%3C2
0091127115356.GC9302_at_jack.stsp.name%3E
[2] http://subversion.tigris.org/issues/show_bug.cgi?id=3546
[3]
http://mail-archives.apache.org/mod_mbox/subversion-dev/200911.mbox/%3C2
0091127132659.GE9302_at_jack.stsp.name%3E
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Received on 2010-01-13 14:14:49 CET