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Re: Possible race condition with git-rebase + .git/index.lock




On Tuesday, March 12 2019, Elijah Newren wrote:

> On Tue, Mar 12, 2019 at 9:48 AM Sergio Durigan Junior
> <sergiodj@xxxxxxxxxxxx> wrote:
>> On Tuesday, March 12 2019, Duy Nguyen wrote:
>>
>> > On Tue, Mar 12, 2019 at 5:18 AM Sergio Durigan Junior
>> > <sergiodj@xxxxxxxxxxxx> wrote:
>> >> This works without problems most of the time (well, usually there are
>> >> conflicts and all, but that's a burden I have to carry).  However,
>> >> sometimes I notice that git fails with:
>> >>
>> >>   # git rebase origin/master
>> >>   ...
>> >>   Applying: commitX
>> >>   Applying: commitY
>> >>   Applying: commitZ
>> >>   fatal: Unable to create '/home/xyz/dir1/dir2/.git/index.lock': File exists.
>> >>
>> >> The first thing I did was to check whether the index.lock file existed,
>> >> but it doesn't.
>> >
>> > Is the output this clean? What I'm looking for is signs of automatic
>> > garbage collection kicking in the middle of the rebase. Something like
>> > "Auto packing the repository blah blah for optimum performance".
>>
>> Yeah, this is the exact output.  I also thought about "git gc", but I
>> don't see any output related to it.  Is it possible that it's being
>> executed in the background and not printing anything?
>
> Any chance you have a cronjob or other task execution mechanism that
> is running git commands in various directories (even simple commands
> like 'git status' since it's not read-only contrary to what some
> expect, or 'git fetch' which might trigger a background gc)?

Nope, nothing like this.  AFAIK, nothing is touching that repository at
the same time that I am.  Besides, even if I wait some minutes before
trying again, the bug manifests again.

-- 
Sergio
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