On Fri, Mar 2, 2012 at 8:12 AM, Daniel Shahaf <danielsh_at_elego.de> wrote:
> Jason Wong wrote on Fri, Mar 02, 2012 at 07:32:38 -0800:
>> On Fri, Mar 2, 2012 at 2:58 AM, Daniel Shahaf <danielsh_at_elego.de> wrote:
>> > Jason Wong wrote on Thu, Mar 01, 2012 at 10:01:26 -0800:
>> >> I have had a developer here create a build of the latest SVN code
>> >> with your changes you mentioned in r1294470 for the svnadmin verify
>> > Okay, that's great news, for two reasons:
>> > 1. It means building svn on windows isn't as painful as it used to be :)
>> Actually, it did take some work to get it going as we did not have
>> another system available to us and also did not have VC++ 6. We had
>> to use VS 2010 in order to do this. Also, for the other components
>> required (python,perl etc), the files after the install were copied
>> to the workstation to see if it would work as we did not want to
>> change the current workstation configuration by running the
>> installers. All in all, it did seem to work.
> Okay. The normal build requires just the *.exe and *.dll files to be
> placed appropriately (such that the *.exe's and httpd's find their
> libsvn_* DLL's at runtime) --- it doesn't require Administrator access,
> for example.
> To clarify, Perl is only required to build OpenSSL; it is not required
> to build APR, Neon, or Subversion.
>> > 2. It means I can ask you to build a custom server with the 'inprocess'
>> > cache disabled, or (if all else fails) to bisect, per my previous email.
>> > One of the things you could try is to disable caching: simply modify
>> > the function create_cache() in libsvn_fs_fs/caching.c to always return
>> > NULL in *CACHE_P. See below for another suggestion.
>> >> command. We have run 'svnadmin verify' against every revision of our
>> >> hotcopy of our repository taken when we first brought this issue to
>> >> the forums and are now tracking down each of the revisions to see
>> >> what actions were being done at those times.
>> > Thanks! I do hope this work enables us to pinpoint and fix the bug.
>> I will be going through the list to see what else was happening at the
>> same time on the apache server since it was alluded to that there may
>> be concurrency issues. I know the last two times that this error has
>> popped up, we had two svn operations starting at around the same time
>> according to the Apache logs. I will go through the previous apache
>> history to see if this was always the case or not.
> Thanks, looking forward to hear what you come up with.
> FWIW, Justin's reply suggests that the error was seen on three different
> platforms --- Windows, Solaris, and FreeBSD --- so that should narrow
> down the range of possible explanations.
> (I'll also note that at ASF's installation we are not running into new
> instances of the bug.)
I haven't gone through all the cases yet, but I have made progress
through quite a number of them and a pattern seems to be coming up.
I have attached 2 txt files. One shows the modified svnadmin verify
output from the binaries we built. The other shows the revisions and
what appears to have been occuring at the time of the bug. I figure
better to provide this now rather than delay any longer for the rest
of the results.
I will continue to go through the rest of the events and see if
there are other differences seen when the issue occurs. I hope
this information helps.
Received on 2012-03-13 14:58:33 CET