Bug 1332990

Summary:	rpm failing to detect a conflict
Product:	Red Hat Enterprise Linux 7	Reporter:	Peter Rajnoha <prajnoha>
Component:	rpm	Assignee:	Florian Festi <ffesti>
Status:	CLOSED NOTABUG	QA Contact:	BaseOS QE Security Team <qe-baseos-security>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	7.3	CC:	agk, lkardos
Target Milestone:	rc
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-05-04 13:55:04 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	1325394

Description Peter Rajnoha 2016-05-04 13:24:02 UTC

I need to add conflict for certain version of lvm2-libs package in device-mapper-event package, so I have this in lvm2.spec file (device-mapper-event is subpackage of lvm2):

%package -n device-mapper-event
Conflicts: lvm2-libs < 2.02.111

Now, when I tried this, the conflict was not detected properly by rpm. I had lvm2-libs-2.02.105-14.el7.x86_64 installed, which is less that 2.02.111 and so it's surely conflicting version:

[1] rhel7-a/~ # rpm -q lvm2-libs
lvm2-libs-2.02.105-14.el7.x86_64

[1] rhel7-a/~ # rpm -q device-mapper-event
device-mapper-event-1.02.84-14.el7.x86_64

[1] rhel7-a/~ # rpm -vv -F device-mapper-1.02.124-1.el7.x86_64.rpm device-mapper-libs-1.02.124-1.el7.x86_64.rpm device-mapper-event-1.02.124-1.el7.x86_64.rpm device-mapper-event-libs-1.02.124-1.el7.x86_64.rpm &> log

# grep "Conflicts: lvm2-libs" log 
D: Conflicts: lvm2-libs < 2.02.111                          NO  

--> so it's "NO" for no conflict, despite the version of lvm2-libs installed is lvm2-libs-2.02.105-14.el7.x86_64 (so lower version than 2.02.111).

====

Now, if I try Conflict but without specifying the version, the conflict is detected:

# rpm -q lvm2-libs
lvm2-libs-2.02.105-14.el7.x86_64

# rpm -q device-mapper-event
device-mapper-event-1.02.84-14.el7.x86_64

# rpm -vv -F device-mapper-1.02.124-1.el7.x86_64.rpm device-mapper-libs-1.02.124-1.el7.x86_64.rpm device-mapper-event-1.02.124-1.el7.x86_64.rpm device-mapper-event-libs-1.02.124-1.el7.x86_64.rpm &> log

# grep "Conflicts: lvm2-libs" log 
D: Conflicts: lvm2-libs                                     YES (db provides)

===

So it looks like rpm has an issue with version checking for the Conflicts line.

Comment 2 Alasdair Kergon 2016-05-04 13:49:38 UTC

What about the epoch?

Comment 3 Peter Rajnoha 2016-05-04 13:55:04 UTC

Yeah, it was the epoch indeed - I realized that later on... I got mislead by the name of the package itself which doesn't have epoch there.