warning: ignoring unknown core.fsync component 'true'

warning: ignoring unknown core.fsync component 'true'

[Wang, Jinfeng (CN)]

Hi all,

For a specific git repo, when I clone or fetch the repo, I encounters 
the warning

remote: warning: ignoring unknown core.fsync component 'true'
remote: Enumerating objects: 41, done.
remote: Total 41 (delta 0), reused 0 (delta 0), pack-reused 41
Unpacking objects: 100% (41/41), 37.51 MiB | 10.91 MiB/s, done.

But after clone the repo, I didn't see core.fsync in my .git/config. And 
there isn't anything relates core.fsync.


I also tried git with different version (2.25.1 and 2.34.1) to clone the 
repo, both will show this warning. What configuration causes this warning?


Regards.

Jinfeng

Re: warning: ignoring unknown core.fsync component 'true'

[Patrick Steinhardt]

Hi Jinfeng,

On Wed, Jul 23, 2025 at 11:07:37AM +0800, Wang, Jinfeng (CN) wrote:
> For a specific git repo, when I clone or fetch the repo, I encounters the
> warning
> 
> remote: warning: ignoring unknown core.fsync component 'true'
> remote: Enumerating objects: 41, done.
> remote: Total 41 (delta 0), reused 0 (delta 0), pack-reused 41
> Unpacking objects: 100% (41/41), 37.51 MiB | 10.91 MiB/s, done.
> 
> But after clone the repo, I didn't see core.fsync in my .git/config. And
> there isn't anything relates core.fsync.

The problem doesn't exist on the client-side, but rather on the remote
as indicated by the "remote: " prefix. So there's nothing you can do on
the client-side to address the problem, you'll have to reach out to the
admin of that repository and tell them that the repository uses an
invalid value for "core.fsync".

> I also tried git with different version (2.25.1 and 2.34.1) to clone the
> repo, both will show this warning. What configuration causes this warning?

It's "core.fsync" indeed, but not on your side. The config does not take
a boolean, but rather a list of components that should use fsync. I
guess the admin wanted to just fsync everything, but in that case you
don't want "core.fsync=true" but "core.fsync=all".

Patrick

Re: warning: ignoring unknown core.fsync component 'true'

[Wang, Jinfeng (CN)]

Hi Patrick,

Thanks.

On 7/23/2025 1:27 PM, Patrick Steinhardt wrote:
> CAUTION: This email comes from a non Wind River email account!
> Do not click links or open attachments unless you recognize the sender and know the content is safe.
>
> Hi Jinfeng,
>
> On Wed, Jul 23, 2025 at 11:07:37AM +0800, Wang, Jinfeng (CN) wrote:
>> For a specific git repo, when I clone or fetch the repo, I encounters the
>> warning
>>
>> remote: warning: ignoring unknown core.fsync component 'true'
>> remote: Enumerating objects: 41, done.
>> remote: Total 41 (delta 0), reused 0 (delta 0), pack-reused 41
>> Unpacking objects: 100% (41/41), 37.51 MiB | 10.91 MiB/s, done.
>>
>> But after clone the repo, I didn't see core.fsync in my .git/config. And
>> there isn't anything relates core.fsync.
> The problem doesn't exist on the client-side, but rather on the remote
> as indicated by the "remote: " prefix. So there's nothing you can do on
> the client-side to address the problem, you'll have to reach out to the
> admin of that repository and tell them that the repository uses an
> invalid value for "core.fsync".
>
>> I also tried git with different version (2.25.1 and 2.34.1) to clone the
>> repo, both will show this warning. What configuration causes this warning?
> It's "core.fsync" indeed, but not on your side. The config does not take
> a boolean, but rather a list of components that should use fsync. I
> guess the admin wanted to just fsync everything, but in that case you
> don't want "core.fsync=true" but "core.fsync=all".
>
> Patrick

Regards,

Jinfeng