Dependency Challenge with CentOS

Question

Given the following output, suggestions on what to try first? This is on a CentOS 5.3 box (upgraded from 5.2 via yum) running as a little dev server. I'm generally comfortable with *nix, but dependency chasing leaves me a bit perplexed at times. So this time I'm seeking help before I run amuck.

Output from today's "yum update":

Setting up Update Process
Resolving Dependencies
--> Running transaction check
---> Package perl-Net-SSLeay.i386 0:1.35-1.el5.rf set to be updated
---> Package perl-IO-Socket-SSL.noarch 0:1.26-1.el5.rf set to be updated
---> Package perl-Net-DNS.i386 0:0.65-1.el5.rf set to be updated
---> Package perl-Package-Constants.noarch 0:0.02-1.el5.rf set to be updated
---> Package perl-IO-Compress.noarch 0:2.020-1.el5.rf set to be updated
--> Processing Dependency: perl(Compress::Raw::Bzip2) >= 2.020 for package: perl-IO-Compress
--> Processing Dependency: perl(Compress::Raw::Zlib) >= 2.020 for package: perl-IO-Compress
--> Running transaction check
---> Package perl-Compress-Raw-Bzip2.i386 0:2.015-1.el5.rf set to be updated
---> Package perl-IO-Compress.noarch 0:2.020-1.el5.rf set to be updated
--> Processing Dependency: perl(Compress::Raw::Zlib) >= 2.020 for package: perl-IO-Compress
--> Finished Dependency Resolution
perl-IO-Compress-2.020-1.el5.rf.noarch from rpmforge has depsolving problems
  --> Missing Dependency: perl(Compress::Raw::Zlib) >= 2.020 is needed by package perl-IO-Compress-2.020-1.el5.rf.noarch (rpmforge)
Error: Missing Dependency: perl(Compress::Raw::Zlib) >= 2.020 is needed by package perl-IO-Compress-2.020-1.el5.rf.noarch (rpmforge)

perl(Compress::Raw::Zlib) is a package name?!? If so, I get this on an update attempt:

Package perl-Compress-Raw-Zlib-2.015-1.el5.rf.i386 already installed and latest version

Wrong version, yet says it is the latest...

Just in case this is helpful:

$ uname -a
Linux EFhermesDev 2.6.18-128.1.16.el5.centos.plus #1 SMP Wed Jul 1 13:06:47 EDT 2009 i686 i686 i386 GNU/Linux

Answer 1

You are seeing an rpmforge dependency problem, not a CentOS dependency problem.

rpmforge perl modules are mass rebuilt at the moment. See http://lists.rpmforge.net/pipermail/users/2009-July/002508.html ff.

Answer 2

You can get version 2.020 here (readme). It was released June 3, 2009.

Background:

The dependency is calling for a newer version than your repository thinks is the newest version:

Error: Missing Dependency: perl(Compress::Raw::Zlib) >= 2.020 is needed by package perl-IO-Compress-2.020-1.el5.rf.noarch (rpmforge)

You have an older version installed than the dependency calls for:

Package perl-Compress-Raw-Zlib-2.015-1.el5.rf.i386 already installed and latest version

As it says, you need to install:

perl(Compress::Raw::Zlib) >= 2.020

in order to resolve this dependency.

Answer 3

That's because the repository you are using is out of sync with itself.

Browse this site.

As of this post, the perl-IO-Compress.noarch package was updated to 2.020 and it depends on a 2.020 version of perl-Compress-Raw-Zlib.

However, the perl-Compress-Raw-Zlib is still at 2.015. You can wait till they catch up or you can ignore perl-IO-Compress.noarch in yum till then.

Try adding:

exclude=perl-IO-Compress*

to /etc/yum.conf. (Haven't tested this, you may have to add other excludes, Try this from the command line and see what happens before adding to yum.conf)

You should be using the EPEL repo for things like this as far as possible. EPEL is a Fedora sub project and has higher standards.

Try to remove any rpmforge packages (and the yum repository) and use EPEL only.

Answer 4

Note that from CentOS-5.3 onwards you can try:

   yum update --skip-broken

...this will likely work even better in 5.4.

Answer 5

The "exclude=perl-IO-Compress*" statement does not work. The yum upgrade gets past this problem but encounters this problem later.

--> Finished Dependency Resolution Error: Missing Dependency: perl(IO::Compress::Base::Common) >= 2.015 is needed by package perl-Compress-Zlib Error: Missing Dependency: perl(IO::Uncompress::Gunzip) >= 2.015 is needed by package perl-Compress-Zlib Error: Missing Dependency: perl(IO::Compress::Gzip) >= 2.015 is needed by package perl-Compress-Zlib Error: Missing Dependency: perl(IO::Compress::Gzip::Constants) >= 2.015 is needed by package perl-Compress-Zlib

Answer 6

I'm also having a problem that might be similar, I didn't understand the fix by eleven81 above. Could someone look at my problem, which might be different and help me out?

This is the first time, since 4 years ago, that I've seen this problem.

# yum update
Setting up Update Process
Setting up repositories
dag                       100% |=========================| 1.1 kB    00:00
kbs-CentOS-Extras         100% |=========================|  951 B    00:00
kbs-CentOS-Misc           100% |=========================|  951 B    00:00
update                    100% |=========================|  951 B    00:00
base                      100% |=========================| 1.1 kB    00:00
http://centos.spiegelserver.eu/4.7/addons/i386/repodata/repomd.xml: [Errno 4] IOError: <urlopen error (-3, 'Temporary failure in name resolution')>
Trying other mirror.
addons                    100% |=========================|  951 B    00:00
extras                    100% |=========================| 1.1 kB    00:00
Reading repository metadata in from local files
Resolving Dependencies
--> Populating transaction set with selected packages. Please wait.
---> Package perl-IO-Compress.noarch 0:2.020-1.el4.rf set to be updated
---> Package perl-IO-Socket-SSL.noarch 0:1.26-1.el4.rf set to be updated
---> Package perl-Net-DNS.i386 0:0.65-1.el4.rf set to be updated
---> Package perl-Net-SSLeay.i386 0:1.35-1.el4.rf set to be updated
--> Running transaction check
--> Processing Dependency: perl(Compress::Raw::Bzip2) >= 2.020 for package: perl-IO-Compress
--> Processing Dependency: perl(Compress::Raw::Zlib) >= 2.020 for package: perl-IO-Compress
--> Finished Dependency Resolution
Error: Missing Dependency: perl(Compress::Raw::Bzip2) >= 2.020 is needed by package perl-IO-Compress
Error: Missing Dependency: perl(Compress::Raw::Zlib) >= 2.020 is needed by package perl-IO-Compre

Thanks in advance,

Shai

Answer 7

Eek, don't change your repo just based on this one dependency error, they will fix it. Just be a little patient. Changing to the EPEL repo can cause other issues that may need to be fixed along the way, as they have different packages/builds/dependencies and if you are geared for RPMForge then you may need to change some packages to suit EPEL. So you are just swapping one issue for another.

Answer 8

[solved] I'm trying (what a fool I was, just yesterday ;-) )

rpm -Uvh http://download.fedora.redhat.com/pub/epel/5/i386/epel-release-5-3.noarch.rpm

yum update

as they have the version 2.020 of perl(Compress::Raw::Zlib)

alexx

p.s. Zaph was right - this was the wrong way to go, (but I got there in the end with zero emails lost and zero downtime for my web servers.)

Answer 9

Hi, How I got it to work. I individually yum installed all the packages, one at a time. The only one that didn't go was the perl-IO-Compress. I went to http://packages.sw.be from above link, and downloaded the perl-IO-Compress-2.020-2/el5.rf.noarch.rpm (I am running RHEL 5.3) to a seperate directory. I then ran yum install *.rpm from that directory. It installed with no problem!!! Also, my application still works.