[ccache] Bug? ccache: error: Could not stat <cache file> (permission denied when creating?): No such file or directory

[Joel Rosdahl]

On 7 December 2012 03:51, Michael Ellerman <michael at ellerman.id.au> wrote:
> [...]
> The error we see is like:
>
>         ccache: error: Could not stat /scratch/kisskb/ccache/0/d/01dfc7d17f46f8d9b361ba9323e8c9-1921690.o.tmp.stdout.Sprygo.8282
>         (permission denied when creating?): No such file or directory
> [...]
> So basically 11295 is running cleanup_dir() and deleting files that are
> still being written to. The full log shows 11295 deleting lots of files.
>
> From a brief look at the code I don't see any logic which would prevent
> this from happening, other than that usually there is enough space in
> the cache so that only old files are deleted.
>
> I'm not sure what the best way to avoid this is. The old logic of
> noticing the stdout is missing and calling failed() at least doesn't
> break the build.

Thanks for the bug report and analysis!

I have addressed the issue by detecting failure to create the
temporary stdout/stderr files earlier so that no fatal() call is
needed for the cleanup scenario. The fix will be included in v3.1.9.

-- Joel