Still present with yum-3.4.3-155.fc22.noarch

I get the same message:
Failed to check for updates with the following error message:
Failed to build transaction: Success - empty transaction

without having any dependency problems.

$ rpm -q yum
yum-3.4.3-118.el7.centos.noarch

$ rpm -q yum-cron
yum-cron-3.4.3-118.el7.centos.noarch

This bug appears to have been reported against 'rawhide' during the Fedora 22 development cycle.
Changing version to '22'.

More information and reason for this action is here:
https://fedoraproject.org/wiki/Fedora_Program_Management/HouseKeeping/Fedora22

This bug is also present in CentOS 7 (and therefore RHEL?). Here's a fix:

diff --git a/yum-cron/yum-cron.py b/yum-cron/yum-cron.py
index 20911af..66f9c19 100755
--- a/yum-cron/yum-cron.py
+++ b/yum-cron/yum-cron.py
@@ -504,7 +504,13 @@ class YumCronBase(yum.YumBase, YumOutput):
         except yum.Errors.RepoError, e:
             self.emitCheckFailed("%s" %(e,))
             sys.exit()
-        if res != 2:
+        if res == 0:
+            # success, empty transaction
+            sys.exit(0)
+        elif res == 2:
+            # success, dependencies resolved
+            pass
+        else:
             self.emitCheckFailed("Failed to build transaction: %s" %(str.join("\n", resmsg),))
             sys.exit(1)

That "except:" clause in the very first line of your patches context is broken too. exit() should be exit(1).

Can you please add Product: RHEL 7?

I have the same issue on CentOS 7.
The fix from #4 and #5 worked for me, but there is no /yum-cron/yum-cron.py
I changed the lines in /usr/sbin/yum-cron

The same here, I'm running CentOS 7, build 1503

Name        : yum-cron
Arch        : noarch
Version     : 3.4.3
Release     : 125.el7.centos

The fix above solved it.

Same issue here. Fix solved it.

Name        : yum-cron
Version     : 3.4.3
Release     : 125.el7.centos

CentOS Linux release 7.1.1503 (Core)

The issue is still there in RHEL7 and CentOS7

The issue is still there in RHEL7 and CentOS7

RHEL7: yum-cron-3.4.3-132.el7.noarch
CentOS7: yum-cron-3.4.3-132.el7.centos.0.1.noarch

Yep, still there:

yum-cron-3.4.3-132.el7.centos.0.1.noarch

Pull request submitted:
https://github.com/rpm-software-management/yum/pull/9

Andreas, the patch you provided looks good so I've applied it, thanks!

Felix, thanks for pointing out the missing exit code, I've included it in the pull request as well.

Hi 

I try the purpose patch, but doing so, I get no more yum update message alert :

In /usr/sbin/yum-cron, i did this :

        if res == 0:
            # success, empty transaction
            sys.exit(0)
        elif res == 2:
            # success, dependencies resolved
            pass
        else:


I work on four Centos7 server, and I only have this e-mail message on one :

/etc/cron.daily/0yum-daily.cron:

Failed to check for updates with the following error message: 
Failed to build transaction: Succès - transaction vide

I compare yum-cron, but file are same

Manual yum update work fine.

Yum package on this server :

rpm -qa | grep yum
yum-cron-3.4.3-132.el7.centos.0.1.noarch
yum-plugin-fastestmirror-1.1.31-34.el7.noarch
yum-plugin-protectbase-1.1.31-34.el7.noarch
yum-utils-1.1.31-34.el7.noarch
yum-3.4.3-132.el7.centos.0.1.noarch
yum-plugin-priorities-1.1.31-34.el7.noarch
yum-metadata-parser-1.1.4-10.el7.x86_64


CentOs version on this server :

rpm -qa | grep release
centos-release-7-2.1511.el7.centos.2.10.x86_64

Kernel version on this server :

uname -r
3.10.0-327.22.2.el7.x86_64

cordialy

Hi,

(In reply to narutobaka from comment #23)
> Hi 
> 
> I try the purpose patch, but doing so, I get no more yum update message
> alert :

Do you get no alerts even when there _are_ actual updates available to install?  If you get no alerts when there are no updates, that's what this patch is supposed to do :)

Maybe seeing what your /etc/yum/yum-cron.conf file looks like would help.  Could you attach it?

> I work on four Centos7 server, and I only have this e-mail message on one :
> 
> /etc/cron.daily/0yum-daily.cron:
> 
> Failed to check for updates with the following error message: 
> Failed to build transaction: Succès - transaction vide

That's weird and shouldn't happen with the patch applied.  There is actually no code path that would lead to this exact error message, other than the one which we're fixing with the patch.  Are you sure the email was sent at the time when you already had applied the patch?

Hi,

works fine if "update_cmd = default" is set in /etc/yum/yum-cron.conf.
Fails if "update_cmd = security" is set. Hope that helps to fix it.

# cat /etc/redhat-release 
CentOS Linux release 7.2.1511 (Core) 
# uname -r
3.10.0-327.28.2.el7.x86_64
# rpm -qa yum-cron
yum-cron-3.4.3-132.el7.centos.0.1.noarch

(In reply to velifera from comment #26)
> Hi,
> 
> works fine if "update_cmd = default" is set in /etc/yum/yum-cron.conf.
> Fails if "update_cmd = security" is set. Hope that helps to fix it.

Hey,

Yes, that's right.  We have already fixed this and the commit has been merged upstream:
https://github.com/rpm-software-management/yum/commit/ae22bcdbacc01b12175304e14df59bdda45aa108

Thank you for your input, though!

When will it be fixed/pushed to el7 updates? It's been 1.5 years.

It's in 7.3beta, so presumably in a couple months when it is released.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2016-2397.html