cache issue

Sat Feb 28 13:37:19 CET 2015

On Sat, Feb 28, 2015 at 12:06:41PM +0000, Bertrand Jacquin wrote:
> We are still experiencing the issue. Is there any fixes with newer 
> releases ?

I have just tried to reproduce this with the latest version and have not
been able to do so, but I'm not aware of any changes that should have an
effect on this (there is one cache change, 6ceba45 Skip cache slot when
time-to-live is zero, but that only applies if you set one of the *-ttl
values to zero).

The cache timeout logic relies on the mtime of the cache file, so this
could be affected by your filesystem, but it sounds like the problem is
that the .lock files are not being cleaned up.  When CGit finds a .lock
file for a cache slot it is trying to use it will just serve the stale
content, on the assumption that is has only just been replaced.

I can't see many ways that you can end up with stale lock files; the
only options are:

1) CGit crashes, in which case there should be some evidence in the
   system log.
2) rename(2) fails, presumably because the destination file exists.

> On 23/03/2014 14:06, Bertrand Jacquin wrote:
> > Hi,
> > 
> > I'm getting some trouble with cgit on enlightenment platforms and cache
> > since some time, but at it seems to be reproductable with cgit 0.10 
> > here
> > is a report.
> > 
> > The cache configuration look like this :
> > 
> > cache-root=../cache
> > cache-size=10000
> > cache-static-ttl=1
> > cache-dynamic-ttl=1
> > cache-repo-ttl=1
> > cache-root-ttl=1
> > cache-scanrc-ttl=5
> > 
> > * Main page
> > 
> > $ curl -sD - -o /dev/null https://git.enlightenment.org/ \
> >   | grep -E '^(Date|Expires|Last-Modified): '
> > Date: Sun, 23 Mar 2014 14:02:08 GMT
> > Expires: Sun, 23 Mar 2014 14:02:52 GMT
> > Last-Modified: Sun, 23 Mar 2014 14:01:52 GMT
> > 
> > In this page, core/elementary.git is shown as last modified '58 min.'
> > ago.
> > 
> > $ curl -s https://git.enlightenment.org/ \
> >   | sed -e 's;<html xmlns=.*>;<html>;' \
> > 	| xmlstarlet fo -o -D -R --html 2> /dev/null \
> > 	| xmlstarlet sel -T -t \
> >       -m 
> > "html/body/div/div/table/tr/td/a[@title='core/elementary.git']" \
> > 			-v "../..//span[@class='age-mins']" -n
> > 58 min.
> > 
> > * Repo page
> > 
> > $ curl -sD - -o /dev/null 
> > https://git.enlightenment.org/core/elementary.git/ \
> >   | grep -E '^(Date|Expires|Last-Modified): '
> > Date: Sun, 23 Mar 2014 14:02:14 GMT
> > Expires: Mon, 10 Mar 2014 20:49:55 GMT
> > Last-Modified: Mon, 10 Mar 2014 20:48:55 GMT
> > 
> > As you see, the Expires header is wrong as the configuration state it
> > should not be older than 1 minute (cache-repo-ttl).
> > 
> > Here, master is the last modified branch and is shown as last modified
> > '3 hours' ago.
> > 
> > $ curl -s https://git.enlightenment.org/core/elementary.git/ \
> >   | sed -e 's;<html xmlns=.*>;<html>;' \
> > 	| xmlstarlet fo -o -D -R --html 2> /dev/null \
> > 	| xmlstarlet sel -T -t \
> >       -m 
> > "html/body/div/div/table/tr/td/a[@href='skins/larry/core/elementary.git/log/']" 
> > \
> >       -v "../..//span[@class='age-hours']" -n
> > 3 hours
> > 
> > * All branch page
> > 
> > $ curl -sD - -o /dev/null
> > https://git.enlightenment.org/core/elementary.git/refs/heads \
> >   | grep -E '^(Date|Expires|Last-Modified): '
> > Date: Sun, 23 Mar 2014 14:02:22 GMT
> > Expires: Sun, 23 Mar 2014 14:03:22 GMT
> > Last-Modified: Sun, 23 Mar 2014 14:02:22 GMT
> > 
> > In this page, the master is showned as last modified '61 min.' ago.
> > 
> > $ curl -s https://git.enlightenment.org/core/elementary.git/refs/heads 
> > \
> >   | sed -e 's;<html xmlns=.*>;<html>;' \
> > 	| xmlstarlet fo -o -D -R --html 2> /dev/null \
> > 	| xmlstarlet sel -t \
> >       -m 
> > "html/body/div/div/table/tr/td/a[@href='skins/larry/core/elementary.git/log/']" 
> > \
> >       -v "../..//span[@class='age-mins']" -n
> > 61 min.
> > 
> > How can we fix this ? I have some .lock files in the cache directory, 
> > is
> > there any way to flush the lock files after some period ? Also, to help
> > debugging this, it should be nice to have a X-Cgit-Cache: header
> > containing the cache file used given to user.
> > 
> > Once I remove '*.lock' in cache directory, 'Repo page' and 'All branch
> > page' are equal, but 'Main page' is not OK (ordered in the same as
> > before) :
> > 
> > 62 min.
> > 65 min.
> > 65 min.
> 
> -- 
> Bertrand
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