Bug#798989: Files seem to appear and disappear

[Peter Palfrader <weasel@debian.org>]

On Mon, 14 Sep 2015, Chris Lamb wrote:

> $ while :; do curl -qs
> http://snapshot.debian.org/archive/debian/20150914T153145Z/pool/main/r/redis/redis_3.0.4-3.dsc
> | grep -qs '404 Not Found' && echo 200 || echo 404; done
> 
> curl -I for a success is:
>   HTTP/1.1 200 OK

> curl -I for a 404 is:
>   HTTP/1.1 404 Not Found

> These files are quite new to the archive (~6h?) at the time of writing.
> (Load-balancer related?)

There is no load balancer, but snapshot.debian.org is a round-robin of
two hosts.  Both have the file on disk:

On the sceondary:
| weasel@lw02:/storage/snapshot-farm-2/52/a8$ ls -lart 52a8b3ba37fee9e3161e8ab317d18b582e20e8ee -c
| -rw-r--r-- 1 snapshot snapshot 1961 Sep 14 16:29 52a8b3ba37fee9e3161e8ab317d18b582e20e8ee

and you can get it via http://snapshot.debian.org/file/52a8b3ba37fee9e3161e8ab317d18b582e20e8ee
but the database is out of sync:

| weasel@defiant:~$ wget http://snapshot-sibelius.debian.org/project/trace/snapshot-master.debian.org -O - -q
| Mon Sep 14 15:31:45 2015
| # Above timestamp is timestamp of latest mirrrorrun
| weasel@defiant:~$ wget http://snapshot-lw07.debian.org/project/trace/snapshot-master.debian.org -O - -q
| Mon Sep 14 03:14:10 2015
| # Above timestamp is timestamp of latest mirrrorrun

Investigating.

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