Re: git-svn "Temp file with moniker 'svn_delta' already in use" and skelta mode

["Bert Huijben" <bert@qqmail.nl>]

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Note that the commit logic in libsvn_client uses exactly the same driver pattern, but even in a more extreme way: it opens all nodes before closing the first file that will receive content changes.


Serf was only the first driver to do it this way in the other direction.


Bert






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From: Branko Čibej
Sent: ‎Saturday‎, ‎July‎ ‎6‎, ‎2013 ‎2‎:‎34‎ ‎AM
To: users@subversion.apache.org
Cc: Subversion Development; git@vger.kernel.org




[Copying dev@ because it's related to a known issue that we document more loudly.]

On 06.07.2013 00:51, David Rothenberger wrote: 

I cannot reproduce this problem using command-line tools, but I was
able to do a trace of git-svn when it is failing and it looks to me
that the problem is in the order in which the SVN::Delta::Editor
(svn_delta_editor_t) function are being called.

The order I see is:
 1. open_root
 2. open_directory
 3. add_file
 4. apply_textdelta
 5. add_file
 6. apply_textdelta

The git-svn code is expecting a close_file call before the add_file
call in #5. It appears to me that the svn_delta_editor_t API [1]
requires this close_file call. It looks to me like this is Issue
#2932 [2].

Indeed it is.

And it is actually documented here:

https://svn.apache.org/repos/asf/subversion/trunk/notes/api-errata/1.7/ra001.txt

and mentioned here:

http://subversion.apache.org/docs/release-notes/1.7.html#svnrdump


In other words, this is a limitation of the Serf-based backend that has been around since Subversion 1.4. I'm aware that it isn't documented as well as it should be, but the bulk-mode workaround exists in part as a workaround for that, effectively disabling the more efficient HTTPv2 protocol.

In the meantime, it might be a good idea to relax the restrictions in git-svn to account for the way the HTTPv2 protocol works.

-- Brane


-- 
Branko Čibej | Director of Subversion 
WANdisco // Non-Stop Data 
e. brane@wandisco.com

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