[SOLVED] Resolving dependency errors in RHEL yum with python* packages

penyuan · 07-16-2018, 06:39 AM

Hello,

I've got a RHEL 7.5 system that is having trouble with "sudo yum update". When I run that command, it says:

Code:

Resolving Dependencies
--> Running transaction check
---> Package python.x86_64 0:2.7.5-68.el7 will be updated
--> Processing Dependency: python = 2.7.5-68.el7 for package: tkinter-2.7.5-68.el7.x86_64
---> Package python.x86_64 0:2.7.5-69.el7_5 will be an update
---> Package python-libs.x86_64 0:2.7.5-68.el7 will be updated
---> Package python-libs.x86_64 0:2.7.5-69.el7_5 will be an update
--> Finished Dependency Resolution
--> Finding unneeded leftover dependencies
Found and removing 0 unneeded dependencies
Error: Package: tkinter-2.7.5-68.el7.x86_64 (@rhel-7-server-optional-rpms)
           Requires: python = 2.7.5-68.el7
           Removing: python-2.7.5-68.el7.x86_64 (@rhel-7-server-rpms)
               python = 2.7.5-68.el7
           Updated By: python-2.7.5-69.el7_5.x86_64 (rhel-7-server-rpms)
               python = 2.7.5-69.el7_5
           Available: python-2.7.5-16.el7.x86_64 (rhel-7-server-rpms)
               python = 2.7.5-16.el7
           Available: python-2.7.5-18.el7_1.1.x86_64 (rhel-7-server-rpms)
               python = 2.7.5-18.el7_1.1
           Available: python-2.7.5-34.el7.x86_64 (rhel-7-server-rpms)
               python = 2.7.5-34.el7
           Available: python-2.7.5-38.el7_2.x86_64 (rhel-7-server-rpms)
               python = 2.7.5-38.el7_2
           Available: python-2.7.5-39.el7_2.x86_64 (rhel-7-server-rpms)
               python = 2.7.5-39.el7_2
           Available: python-2.7.5-48.el7.x86_64 (rhel-7-server-rpms)
               python = 2.7.5-48.el7
           Available: python-2.7.5-58.el7.x86_64 (rhel-7-server-rpms)
               python = 2.7.5-58.el7
**********************************************************************
yum can be configured to try to resolve such errors by temporarily enabling
disabled repos and searching for missing dependencies.
To enable this functionality please set 'notify_only=0' in /etc/yum/pluginconf.d/search-disabled-repos.conf
**********************************************************************

Error: Package: tkinter-2.7.5-68.el7.x86_64 (@rhel-7-server-optional-rpms)
           Requires: python = 2.7.5-68.el7
           Removing: python-2.7.5-68.el7.x86_64 (@rhel-7-server-rpms)
               python = 2.7.5-68.el7
           Updated By: python-2.7.5-69.el7_5.x86_64 (rhel-7-server-rpms)
               python = 2.7.5-69.el7_5
           Available: python-2.7.5-16.el7.x86_64 (rhel-7-server-rpms)
               python = 2.7.5-16.el7
           Available: python-2.7.5-18.el7_1.1.x86_64 (rhel-7-server-rpms)
               python = 2.7.5-18.el7_1.1
           Available: python-2.7.5-34.el7.x86_64 (rhel-7-server-rpms)
               python = 2.7.5-34.el7
           Available: python-2.7.5-38.el7_2.x86_64 (rhel-7-server-rpms)
               python = 2.7.5-38.el7_2
           Available: python-2.7.5-39.el7_2.x86_64 (rhel-7-server-rpms)
               python = 2.7.5-39.el7_2
           Available: python-2.7.5-48.el7.x86_64 (rhel-7-server-rpms)
               python = 2.7.5-48.el7
           Available: python-2.7.5-58.el7.x86_64 (rhel-7-server-rpms)
               python = 2.7.5-58.el7

I don't understand what the errors mean. Looks like yum is trying to update python from 2.7.5-68 to 2.7.5-69, and I don't see why that's a problem. What am I missing and how do I troubleshoot this? Thanks!

MensaWater · 07-16-2018, 08:37 AM

Did you run "sudo yum makecache fast" first? That solves a lot of issues.

The complaint is that the older tkinter requires the older python. You might try "sudo yum update python tkinter" so it knows you're updating both (even though it SHOULD determine this itself). Failing that you could first "sudo yum remove tkinter" then do your "sudo yum update python" and finally reinstall with "sudo yum install tkinter".

penyuan · 07-16-2018, 08:47 AM

Quote:

Originally Posted by MensaWater

Did you run "sudo yum makecache fast" first? That solves a lot of issues.

The complaint is that the older tkinter requires the older python. You might try "sudo yum update python tkinter" so it knows you're updating both (even though it SHOULD determine this itself). Failing that you could first "sudo yum remove tkinter" then do your "sudo yum update python" and finally reinstall with "sudo yum install tkinter".

Thanks @MensaWater for your very quick answer! I tried most of your suggestions and didn't work until the last one, which is to remove the tkinter package first. After removing it, I was able to update python with no problems.

However, when I run "sudo yum install tkinter" it says that there is no tkinter package! I don't use tkinter very often, but it is distressing that the tkinter package has disappeared... I tried "yum search tkinter" and it shows only Python 3 tkinters:

Code:

python34-tkinter.x86_64
python36-tkinter

Is there a way to find out what happened?

MensaWater · 07-16-2018, 12:53 PM

Starting with RHEL6 RedHat made a change where you have to add additional repositories to get other packages. This is true in RHEL7.

On RHEL7.5 python is in rhel-7-server-rpms but tkinter is in rhel-7-server-optional-rpms.

You can see which repos are enabled with "sudo subscription-manager repos --list-enabled" which should output something like:

Quote:

+----------------------------------------------------------+
Available Repositories in /etc/yum.repos.d/redhat.repo
+----------------------------------------------------------+
Repo ID: rhel-7-server-rpms
Repo Name: Red Hat Enterprise Linux 7 Server (RPMs)
Repo URL: https://cdn.redhat.com/content/dist/rhel/server/7/$releasever/$basear
ch/os
Enabled: 1

Repo ID: rhel-7-server-optional-rpms
Repo Name: Red Hat Enterprise Linux 7 Server - Optional (RPMs)
Repo URL: https://cdn.redhat.com/content/dist/rhel/server/7/$releasever/$basear
ch/optional/os
Enabled: 1

If rhel-7-server-optional-rpms isn't shown you can enable it with:
"sudo subscription-manager repos --enable rhel-7-server-optional-rpms"

It is likely the lack of the repo that caused your earlier issue. It couldn't find the update.

FYI:
You can see all possible repos with just "sudo subscription-manager repos --list" Repositories with Enabled value 0 are disabled and be enabled using similar syntax.

penyuan · 07-16-2018, 01:56 PM

Quote:

Originally Posted by MensaWater

Starting with RHEL6 RedHat made a change where you have to add additional repositories to get other packages. This is true in RHEL7.

On RHEL7.5 python is in rhel-7-server-rpms but tkinter is in rhel-7-server-optional-rpms.

You can see which repos are enabled with "sudo subscription-manager repos --list-enabled" which should output something like:

If rhel-7-server-optional-rpms isn't shown you can enable it with:
"sudo subscription-manager repos --enable rhel-7-server-optional-rpms"

It is likely the lack of the repo that caused your earlier issue. It couldn't find the update.

FYI:
You can see all possible repos with just "sudo subscription-manager repos --list" Repositories with Enabled value 0 are disabled and be enabled using similar syntax.

Success! I tried "sudo subscription-manager repos --enable rhel-7-server-optional-rpms" and that did the trick and I was able to reinstall the tkinter package. I guess tkinter was moved into the "optional-rpms" repository fairly recently (since I installed it without enabling "optional-rpms" in the past)?

Anyway, thank you so much for your help. Marking as solved.

MensaWater · 07-16-2018, 02:15 PM

Quote:

Originally Posted by penyuan

I guess tkinter was moved into the "optional-rpms" repository fairly recently (since I installed it without enabling "optional-rpms" in the past)?

It may be you got tkinter from the original installation of OS. Or if you had the rpm downloaded you could have installed with "rpm -i" bypassing yum altogether.