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Problem: conflicting requests

Posted: 2021/06/10 17:04:13
by warron.french
After a simple build with CentOS-8.1.1911 (Core) I attempted to perform the following:

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yum list installed | egrep "postfix|dovecot"
I did get back the results I did want, but I also got back a couple of errors that has only ever occurred for me on CentOS-8.

What causes this and how do I fix this error, please.
yum-conflicting_requests.PNG
yum-conflicting_requests.PNG (59.57 KiB) Viewed 500 times

Re: Problem: conflicting requests

Posted: 2021/06/10 17:49:30
by jlehtone
grep hides part of output. yum can do the filtering by itself:

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yum list installed \*postfix\* \*dovecot\*
Does that reveal more?


PS. Why with CentOS-8.1.1911? CentOS-8.4.2105 is out already and even CentOS-8.3.2011 has been available for months.

Re: Problem: conflicting requests

Posted: 2021/06/10 18:00:29
by TrevorH
There are multiple perl modules available in CentOS 8 and it appears that you may have the wrong one enabled.

And yes, update to 8.4, don't use 8.1.

Re: Problem: conflicting requests

Posted: 2021/06/10 21:11:11
by warron.french
jlehtone wrote:
2021/06/10 17:49:30
grep hides part of output. yum can do the filtering by itself:

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yum list installed \*postfix\* \*dovecot\*
Does that reveal more?


PS. Why with CentOS-8.1.1911? CentOS-8.4.2105 is out already and even CentOS-8.3.2011 has been available for months.
I want to install CentOS-8.4, but where I was today did not exactly provide me with internet access due to proxies and firewalls, etc... I was hoping a yum update would enable me to update the machine to the latest and then I could use curl or something like that to download the actual 8.4 ISO then move it to our corporate network drives and then load into VMware.

This machine in discussion is actually a VM. That's why CentOS-8.1, I was limited in terms of access to the internet from where I was sitting.

Re: Problem: conflicting requests

Posted: 2021/06/10 21:11:50
by warron.french
TrevorH wrote:
2021/06/10 18:00:29
There are multiple perl modules available in CentOS 8 and it appears that you may have the wrong one enabled.

And yes, update to 8.4, don't use 8.1.
So, is the perl problem generic to CentOS-8 or specific to CentOS-8.1?

Re: Problem: conflicting requests

Posted: 2021/06/10 21:29:25
by jlehtone
That is semi-irrelevant because CentOS Linux 8.1 is no longer supported.

'yum list installed' does not print to stderr on CentOS Linux 8 (the supported 8.4). That could depend on installed packages, but as general rule it does not.

I would remove the offended packages, update everything else, and then reinstall (latest versions) of those packages.

I would probably start with:

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sudo dnf --enablerepo=* clean all
sudo dnf update centos\* dnf\* yum\*
sudo dnf --enablerepo=* clean all
Then perhaps

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sudo dnf update --exclude=kernel\*,perl\*
sudo dnf update --exclude=kernel\*
sudo dnf update
Obviusly, if any step gives errors, then react and adapt rather than proceeding.

Re: Problem: conflicting requests

Posted: 2021/06/11 18:37:24
by warron.french
We finally got proxy settings configured to allow me to install more software, and even updated to CentOS-8.4.2105.

I ran the command you suggested @jlehtone:

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yum list installed \*postfix\* \*dovecot\*
And got back the following output:
yum-conflicting_requests.PNG
yum-conflicting_requests.PNG (43.02 KiB) Viewed 445 times

Re: Problem: conflicting requests

Posted: 2021/06/11 18:40:28
by TrevorH
What does dnf module list perl say?

Re: Problem: conflicting requests

Posted: 2021/06/15 14:16:27
by warron.french
Hey TrevorH, sorry for the delay.

Here is what I can show you:
Capture.PNG
Capture.PNG (67.56 KiB) Viewed 347 times

Re: Problem: conflicting requests

Posted: 2021/06/15 14:32:57
by TrevorH
perl:5.26 is default but not enabled.