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again the same problem which cause the %check session of nss sprc can't be run in mock since it's try to use network:

/builddir/build/BUILD/nss-3.12.8/mozilla/dist/Linux2.6_x86_glibc_PTH_OPT.OBJ/bin/selfserv_9372 -D -p 9372 -d ../server -n localhost.localdomain -w nss -r -r -i ../tests_pid.17054
robot     8746  0.9  0.0   6032  2516 pts/3    S    12:49   0:00                          |       \_ /builddir/build/BUILD/nss-3.12.8/mozilla/dist/Linux2.6_x86_glibc_PTH_OPT.OBJ/bin/tstclnt -p 9372 -h localhost.localdomain -q -d ../client -v

(In reply to comment #0)
Notice the "localhost.localdomain" part so it's really not using the network as such. The problem is caused by possibly a faulty implementation of IPV6. This problem was reported as Bug 589636 and was fixed in RHEL 6.1. See https://bugzilla.redhat.com/show_bug.cgi?id=589636#c44 for the short-term fix that was appplied for RHEL 6.1.

Since RHEL 6.1 External Beta has begun, and this bug remains
unresolved, it has been rejected as it is not proposed as
exception or blocker.

Red Hat invites you to ask your support representative to
propose this request, if appropriate and relevant, in the
next release of Red Hat Enterprise Linux.

I haven't seen any response to comment 2.

it was a mock tty bug. which already fixed in the latest release.

Thanks, I will close then.