On 6/1/19 5:27 AM, Garry T. Williams wrote:
On Friday, May 31, 2019 11:05:20 PM EDT Tim via users wrote:
On Fri, 2019-05-31 at 17:18 -0400, Garry Williams wrote:
But, of course, the issue is why this happens in the first place.

Does your ISP insert a transparent proxy between you and the
internet?  They're well known to cause caching problems.

Ah, ha!  That is a difference between the problem system and the
others I have that do not experience the problem.

My employer does eavesdrop on everything.

I think I found the answer to this. I ran into the same problem with my simple custom proxy. Starting in F30, the repo uses zchunk. This means that dnf requests lots of byte ranges. If the proxy doesn't support this, then librepo fails. According to the http specs, a client MUST support getting more (or less) data than asked for when requesting ranges. However, librepo does not. I'm about to file a bug for this.

The easiest solution for you would be to disable zchunk for dnf on that system. The reason it works after a clean all is that it doesn't have the metadata file to update, so it downloads the whole thing instead of parts of it.
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