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Description of problem:
It's possible to install nss in both 32 and 64-bit versions, but no dependency exists to ensure matching architecture of p11-kit is also installed. 

# rpm -q nss p11-kit-trust
nss-3.21.3-2.el6_8.x86_64
nss-3.21.3-2.el6_8.i686
p11-kit-trust-0.18.5-2.el6_5.2.x86_64
# update-ca-trust enable
update-ca-trust: nss 32 bit is installed. You should install p11-kit-trust 32 bit.
update-ca-trust: aborting, because the nss / p11-kit setup is inconsistent.

ca-certificates package depends on p11-kit-trust, but any of the two builds (32 or 64bit) satisfies the dependency.

Customer expects appropriate dependencies between packages so that it's not possible to end up with an inconsistent set of packages.

Version-Release number of selected component (if applicable):
nss-3.21.3-2.el6

How reproducible:
Always.

Actual results:
Possible to have 32-bit version of nss without matching version of p11-kit. 

Expected results:
Installation of 32-bit nss should result in install of required 32-bit p11-kit.

Red Hat Enterprise Linux 6 transitioned to the Production 3 Phase on May 10, 2017.  During the Production 3 Phase, Critical impact Security Advisories (RHSAs) and selected Urgent Priority Bug Fix Advisories (RHBAs) may be released as they become available.
 
The official life cycle policy can be reviewed here:
 
http://redhat.com/rhel/lifecycle
 
This issue does not appear to meet the inclusion criteria for the Production Phase 3 and will be marked as CLOSED/WONTFIX. If this remains a critical requirement, please contact Red Hat Customer Support to request a re-evaluation of the issue, citing a clear business justification.  Red Hat Customer Support can be contacted via the Red Hat Customer Portal at the following URL:
 
https://access.redhat.com