Yum 2.2 w/ HTTP proxy fails w/ error "Cannot find a valid baseurl for repo:"

[Kam Leo]

On Tue, 29 Mar 2005 22:35:06 +0100 (BST), Mike Fleetwood
<mike at rockover.demon.co.uk> wrote:
> Hi,
> 
> Recently "yum check-update" and "yum update" has started producing the
> error "Cannot find a valid baseurl for repo: ...".  Googling suggests
> that other occurrences have been caused by network connectivity errors
> or miss configured yum repository locations.  I am convinced that in my
> case it is yum 2.2's inability to successfully download files through a
> HTTP proxy that is the problem.  To work around the problem I
> reinstalled yum 2.1 and upgrade using "yum --exclude=yum update".
> 
> Has anybody else had the same experience?
> Can anybody suggest how to debug the code?  Running "yum -d 9 ..."
> doesn't add anything useful.
> 
> I have 2 FC3 installations which I update manually using "yum update"
> regularly.  Both have to use a HTTP proxy (different ones) to access
> the Internet and both have the same problem.
> 
> HTTP proxy setting:
> 
>    [root at bridge ~]# env | grep HTTP
>    HTTP_PROXY=http://rockover:8080/
> 
> Here is yum 2.1 working:
> 
>    [root at bridge ~]# rpm -q yum
>    yum-2.1.12-0.fc3
> 
>    [root at bridge ~]# yum update
>    Setting up Update Process
>    Setting up Repo:  base
>    repomd.xml                100% |=========================| 1.1 kB    00:00
>    Setting up Repo:  updates-released
>    repomd.xml                100% |=========================|  951 B    00:00
>    Reading repository metadata in from local files
>    base      : ################################################## 2622/2622
>    updates-re: ################################################## 742/742
>    Resolving Dependencies
>    --> Populating transaction set with selected packages. Please wait.
>    ---> Package yum.noarch 0:2.2.0-0.fc3 set to be updated
>    --> Running transaction check
> 
>    Dependencies Resolved
>    Transaction Listing:
>      Update: yum.noarch 0:2.2.0-0.fc3
>    Is this ok [y/N]: y
>    Downloading Packages:
>    Running Transaction Test
>    Finished Transaction Test
>    Transaction Test Succeeded
>    Running Transaction
>    Updating: yum 100 % done 1/2
>    Completing update for yum  - 2/2
> 
>    Updated: yum.noarch 0:2.2.0-0.fc3
>    Complete!
> 
> And here is yum 2.2 failing:
> 
>    [root at bridge ~]# rpm -q yum
>    yum-2.2.0-0.fc3
> 
>    [root at bridge ~]# yum update
>    Setting up Update Process
>    Setting up Repos
>    base                      100% |=========================| 1.1 kB     00:00
>    Cannot find a valid baseurl for repo: updates-released
> 
> Thanks for your attention,
> Mike
> --

Check /etc/yum.repos.d/fedora-updates.repo for a typo or invalid url.
You can also add an alternate/fallback repo to this file so that yum
will not abort when the primary repo is not available.

Next time please provide the contents of /etc/yum.conf and all of the
.repo files in /etc/yum.repos.d/