Why did named fail to stop at unmounting /var/named/chroot/var/named on Red Hat Enterprise Linux 6?

Solution Verified - Updated -

Environment

  • Red Hat Enterprise Linux 6.0 Beta 2
  • Red Hat Enterprise Linux 6
  • bind-9.7.0-5.P2.el6.x86_64

Issue

  • Named fails to stop at unmounting /var/named.
$service named stop  
Stopping named: .umount: /var/named/chroot/var/named: device is busy.  
(In some cases useful info about processes that use  
the device is found by lsof(8) or fuser(1))  

$ mount |grep named  
 /var/named on /var/named/chroot/var/named type none (rw,bind)

Resolution

update to version bind-9.8.2-0.10.rc1.el6 or later.

Root Cause

Diagnostic Steps

  • service named stop
  • sosreport

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