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Re: Problem with submodule merge

From
Heiko Voigt <hvoigt@hvoigt.net>
Date
Sep 16, 2011, 14:57 UTC
Message-ID
<20110916145724.GA2782@book.hvoigt.net>
In-Reply-To
<4E734582.6030704@morey-chaisemartin.com>
Hi,

this looks like you have hit a codepath where the submodules object database is not added to the object database. I am not sure why.

Could you try my patch that moves the merge search into a forked process:
3dcb369b allow multiple calls to submodule merge search for the same path

That should solve the issue as a side effect. Its currently in Junio's pu branch.

Cheers Heiko
On Fri, Sep 16, 2011 at 02:48:02PM +0200, Nicolas Morey-Chaisemartin wrote:
Show 39 quoted lines
> Hi,
> 
> We have meet an issue few times at work with submodule merge.
> I'm running git 1.7.7-rc1 build from master on FC15 x86_64 but I've seen the issue on other ditro with older (stable) versions
> 
> I still haven't figured out exactly when it happends but here are the symptoms:
> 
> 1) I commited some updates for a submodule in our integration repo.
> 2) I pulled a remote branch of the integration repo which had an update on the same submodule (but different SHAs)
> 3) When the merge driver try to find a following commit for the submodule, I get some (sometimes many) error messages about refs that point to invalid objects:
> 
> [nmorey@sat:SigmaCToolchain (user/nmorey/dev/0.3.0 *%>)]$ git merge origin/prerelease/0.3-0 
> error: refs/heads/user/nmorey/master does not point to a valid object!
> error: refs/remotes/origin/dev/cpp does not point to a valid object!
> error: refs/remotes/origin/dev/scuk does not point to a valid object!
> error: refs/remotes/origin/dev/sys_agents does not point to a valid object!
> error: refs/remotes/origin/user/bbodin/cea does not point to a valid object!
> error: refs/remotes/origin/user/borgogoz/master does not point to a valid object!
> warning: Failed to merge submodule db (merge following commits not found)
> Auto-merging db
> CONFLICT (submodule): Merge conflict in db
> Automatic merge failed; fix conflicts and then commit the result.
> 
> 
> I checked and the object really exists in the submodule but is in a pack.
> 
> >From checking the strace, git looks for a the object in db/.git/objects/... whch does not exists
> And from what I could figure it, the issue seems to be coming from  find_pack_entry which does not return 1 so git goes looking for loose object
> and cannot find any (as expected).
> This is not a big issue as it just outputs errors about refs and does not block the user but it gets quite scary when there are a few hundreds of them !
> 
> 
> I kept a tarball of the repo so I can provide more info/logs/trace if needed.
> 
> Nicolas
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Previous: Nicolas Morey-ChaisemartinNext: Nicolas Morey-Chaisemartin
Message 2 of 3 in “Problem with submodule merge”
  1. Nicolas Morey-ChaisemartinSep 16, 2011
  2. Heiko VoigtSep 16, 2011
  3. Nicolas Morey-ChaisemartinSep 19, 2011

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