CentOS - Yum doesn't update anymore?

Question

I've been trying to use yum now, but for some reason, not even the search work anymore. I even tried putting packages I already downloaded in the search criteria and is the same.

[root@AMDFX03 Downloads]# yum search glibc
Loaded plugins: fastestmirror, refresh-packagekit, security
Loading mirror speeds from cached hostfile
epel/metalink                                            |  22 kB     00:00     
 * base: centos.secrel.com.br
 * epel: archive.linux.duke.edu
 * extras: centos.secrel.com.br
 * rpmforge: apt.sw.be
 * updates: centos.secrel.com.br
adobe-linux-x86_64/primary                               | 1.2 kB     00:00     
http://linuxdownload.adobe.com/linux/x86_64/repodata/primary.xml.gz:
[Errno -1] Metadata file does not match checksum
Trying other mirror.
Error: failure: repodata/primary.xml.gz from adobe-linux-x86_64:
[Errno 256] No more  mirrors to try.

This error always appear no matter what I do. Please, can you tell me how to fix this, or at least how to reset yum's configuration?

Solution

First of all, thanks to SnakeDoc for the help, I was feeling hopeless with this error. Second, I found in a forum that by adding http_caching=none to the yum.conf file in /etc/, I managed to fix the problem.

Seems that with "yum clean all" was cleaning, but was retrieving the corrupted metadata from the cache. With this, it'll be okay.

Comments

[Xanathos]

I'm on CentOS 6.3, by the way.

[SnakeDoc]

sudo yum clean all might be the trick... i think either your keys are busted or yum database/cache is busted

[Xanathos]

I tried from the url and also from a file in which I save the contents of the key for CentOS 6. It says: "curl: (7) couldn't connect to host error: mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6: import read failed(2)."

[Xanathos]

OK, i managed to download the key, but it's the same result. The same error appears. I also put the "clean all" command from yum. u__u

[SnakeDoc]

sudo yum clean metadata

[Xanathos]

I found the answer. I added http_caching=none to the yum.conf file. Seems the cache was kind of tampered and that's why was reloading corrupted metadata everytime.

[LiuYan 刘研]

i encountered the same problem with Fedora 18, i just temporarily disabled the adobe repository (yum --disablerepo adobe* or edit it's repository file in /etc/yum.repo.d), and then everything will be working again.

[Anthony Bonney]

@Xanathos, +1 Please post the answer you found and accept it as the answer. Thanks.