Bug#867402: Debootstrap Error Couldn't retrieve dists/stretch/main/binary-amd64/Packages

[jg@wn.de]

Hello,

I think it is an interesting point that stretch (9.x) always fails but jessie (8.x) always succeeds
when using e.g. http://snapshot.debian.org/archive/debian/20170711T212509Z/ as mirror URL.


This is how to reproduce the problem:


1) Download linux and initrd.gz for jessie and stretch to your tftp server root to 20170711T212509Z 
   ( e.g. using this script https://cloud.aschendorff.de/s/yEpzOqswzVjXNut ) so you have this structure:

root@tftpserver:/var/tftp# tree 20170711T212509Z/
20170711T212509Z/
├── jessie
│   └── amd64
│       ├── initrd.gz
│       └── linux
└── stretch
    └── amd64
        ├── initrd.gz
        └── linux


2) pxelinux.cfg should look like this


LABEL   1 
	MENU LABEL (^1) jessie snapshot.debian.org test
	kernel 20170711T212509Z/jessie/amd64/linux
	append initrd=20170711T212509Z/jessie/amd64/initrd.gz ipv6.disable=1 language=en country=DE locale=en_GB.UTF-8 keymap=de url=http://boot.mycompany.tld/linux/debian/preseed/20170711T212509Z.cfg --- ipv6.disable=1

LABEL   2 
	MENU LABEL (^2) stretch snapshot.debian.org test
	kernel 20170711T212509Z/stretch/amd64/linux
	append initrd=20170711T212509Z/stretch/amd64/initrd.gz ipv6.disable=1 language=en country=DE locale=en_GB.UTF-8 keymap=de url=http://boot.mycompany.tld/linux/debian/preseed/20170711T212509Z.cfg --- ipv6.disable=1



3) This is the preseed file http://boot.mycompany.tld/linux/debian/preseed/20170711T212509Z.cfg 
   which is used for both, jessie and stretch:


# time/zone
d-i		time/zone		select	Europe/Berlin
tzsetup-udeb	time/zone		select	Europe/Berlin
tzsetup-udeb	tzsetup/country/DE	select	Europe/Berlin

# Participate in the package usage survey?
popularity-contest popularity-contest/participate boolean false

# skip creation of a normal user account.
d-i passwd/make-user boolean false

# lang & keyboard
d-i debian-installer/language string en
d-i debian-installer/country string DE
d-i debian-installer/locale string en_GB.UTF-8  
d-i localechooser/supported-locales multiselect en_US.UTF-8, de_DE.UTF-8
d-i keyboard-configuration/xkb-keymap select de

### Mirror settings snapshot 
d-i mirror/protocol string http
d-i mirror/country string manual
d-i mirror/http/hostname string snapshot.debian.org
d-i mirror/http/directory string /archive/debian/20170618T160104Z

d-i passwd/root-password password linux
d-i passwd/root-password-again password linux


Now selecting jessie just installs fine, but if I choose stretch it fails with "Failed getting Release file"
see screenshot here https://cloud.aschendorff.de/s/0C9P7gZZoEOcHKD

At this point syslog shows:

Jul 12 13:26:39;debian-stretch;user.notice;debootstrap:; /usr/sbin/debootstrap --components=main --debian-installer --resolve-deps --keyring=/usr/share/keyrings/archive.gpg stretch /target http://snapshot.debian.org/archive/debian/20170711T212509Z


Since snapshot.debian.org resolves to 193.62.202.30 and 185.17.185.185 for me I filtered the package capture like this:

tshark -r pxe.pcap -Y "ip.addr == 193.62.202.30 || ip.addr == 185.17.185.185" -w snapshot-stretch.pcap

and uploaded it to https://cloud.aschendorff.de/s/2q5masaf79dR7uH .

To me, in wireshark it looks like the Release file got downloaded completely ("tcp.stream eq 86", framenumber 11090 and following).

So I have no clue what is going wrong. Perhaps it is a timeout/timing problem ?
Or in advance a corrupted md5sum, sha256 file ?

Thanks