Re: Failed Delta RPMs observed in repo

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On Sun, 9 Feb 2020 09:36:54 -0500
John Mellor <john.mellor@xxxxxxxxx> wrote:

> Question for the repo managers,
> 
> Why do I sometimes see invalid checksums for drpm downloads? E.g:
> This excerpt from the update this morning:
> 
>     /var/cache/dnf/updates-7fc4c739b3909d9f/packages/selinux-policy-targeted-3.14.4-46.fc31_3.14.4-47.fc31.noarch.drpm:
>     md5 mismatch of resultSome packages were not downloaded.
>     Retrying.selinux-policy-targeted-3.14.4-47.fc31.noarch.r  14 MB/s
> | 13 MB     00:00  
> 
> It almost always causes the total download size to be larger than any 
> savings from using the drpm format:
> 
>     Failed Delta RPMs increased 41.3 MB of updates to 43.3 MB (-4.1%
> wasted)
> 
> Is this a repo bug?

TLDR;  seeing it too, but don't know the cause.

I've started seeing this recently as well.  In the same update that
contains the error though, many other drpms will rebuild just fine.
So, my guess is that the local version is somehow different from the
version the drpm was created against, so when it rebuilds, the md5 is
different.  That is, I don't think it is a bug in either the repo or
the drpm builder.  But the fact that it only started happening recently
argues against that opinion.  
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