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Description of problem:
When using bind-chroot and calling 'service named start' multiple times
already mounted directories are mounted again every time if they are empty.
In the end you end up with empty directories mounted multiple times.

Version-Release number of selected component (if applicable):
bind-9.8.2-0.17.rc1

How reproducible:
always

Steps to Reproduce:
1. install bind-chroot
2. call 'service named start' multiple times
3. check mounts
  
Actual results:
/etc/named on /var/named/chroot/etc/named type none (rw,bind)
/usr/lib64/bind on /var/named/chroot/usr/lib64/bind type none (rw,bind)

are mounted multiple times.

Expected results:
each file/directory is mounted just once. 

Additional info:

Created attachment 731883 [details]
Check if named is running before mounting files/dirs

This request was evaluated by Red Hat Product Management for
inclusion in the current release of Red Hat Enterprise Linux.
Because the affected component is not scheduled to be updated
in the current release, Red Hat is unable to address this
request at this time.

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

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.

http://rhn.redhat.com/errata/RHBA-2014-1373.html