Description of problem:
named will not shut down cleanly if /var partition has been remounted read-only (e.g. after filesystem corruption detected).

Version-Release number of selected component (if applicable):
bind-9.3.6-4.P1.el5_4.2

How reproducible:
Always

Steps to Reproduce:
1. Remount /var read-only
2. "service named stop" or "rndc halt" or "kill -TERM <pid>"
3.
  
Actual results:
Stop or halt command hangs; named remains active

Expected results:
named should shut down

Additional info:
All other daemons and services accessing /var can be stopped with service(8), although of course they complain they can't remove their /var/run or /var/lock files.  Only named requires a "kill -9".  If this causes the full OS shutdown process to hang, then it may prevent support personnel accessing the server remotely to try to fix it.