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Bug#624122: Hash Sum mismatch



(reordered for the benefit of a response in proper order)

On Wed, Mar 19, 2014 at 12:09:53PM +1100, Drew Parsons wrote:
> I hope your patch fixes it.

No it doesn't because it is included since 0.9.15.2 and you have a
higher version – and not the config enabled which triggered this
error message as a symptom.


> For me the Hash Sum mismatch problem only happens regularly for the
> translation files:
> 
> W: Failed to fetch http://ftp.au.debian.org/debian/dists/unstable/main/i18n/Translation-enIndex  Hash Sum mismatch
> W: Failed to fetch http://ftp.au.debian.org/debian/dists/experimental/main/i18n/Translation-enIndex  Hash Sum mismatch
> E: Some index files failed to download. They have been ignored, or old ones used instead.
> 
> I thought it might just be that the mirror was tardy updating files,
> but then I also experienced it on another mirror.  It seems to happen
> weekly, and take days to clear out. It's quite annoying.

I feel your pain, but there is not much we can do about it. If it is
really days and you can confirm this by looking up the files manually
please report it to the mirror team.

You might also want to check that your ISP is not interfering with a
proxy which keeps files in cache for to long (these "friendly" man-in-
the-middle attacks are more common than you might think).

Mirroring the Debian archive is a huge undertaking as it is very big and
various files depend on each other, so the update would need to be
atomic in theory, but can't be in practice (and even if it would, your
download would need to be atomic as well).

That only Translation-* files are effected could hint that the script
used for the mirror is outdated as these files are relatively new and
older versions probably aren't able to handle them in the stages they
should be handled in.


Best regards

David Kalnischkies

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