Got a sha3-384 mismatch on first download

store
1

Heya,

Just got an error trying to install a snap from the store:

$ sudo snap install series-ninja
error: cannot perform the following tasks:
- Download snap "series-ninja" (9) from channel "stable" (sha3-384 mismatch for "series-ninja":
got
f1ec94b095e68e846e7340679f4334b3f632e083878cb172127dfae86dbcf22b41d9bbef6d45e6f8475f328044475504
but expected 
589f050cddf121abccea2573323f8f93326c5f484d1fa3bf22cd42fe66d8de1daaa53aec63542d2f16c0f481c61a7cfb)

Not sure of what’s happening here. That was the very first download attempt, so there wasn’t any delta work taking place.

Looking at the logs, I see that there was a retry:

Jun  7 13:21:58 nomade /usr/lib/snapd/snapd[4087]: retry.go:47: DEBUG: Retrying
https://public.apps.ubuntu.com/anon/download-snap/NaxeU1hH5ScFI6LN7sLklkf6t9YEFNJY_9.snap
, attempt 2, elapsed time=2m26.641635007s

It looks like in that second attempt the downloaded content was corrupted. I haven’t yet tested that unexpected hash, but I bet it’s from a mutation of the real content. Makes me wonder if the CDN is mishandling range requests. :confused:

Trying once more, the download was restarted from the ground up and succeeded.

2

Please note that this snap will most likely be removed from the store soon.

3

Thanks for this report. Do you have more log content ? I ask because the code should do an automatic retry on HashError once. I wonder if this code did not work for some reason or if it really tried it two times and got a hash error in both cases (and if that is the case its interessting that your manual subsequent attempt worked).