rndc stop hangs, named stuck at FUTEX WAIT

[Chuck Anderson]

On Sat, Dec 13, 2014 at 11:05:52AM -0500, Chuck Anderson wrote:
> For the second time (at least), an automatic BIND update on Scientific
> Linux 6 (RHEL 6 clone) failed to restart the named process.  The RPM
> package runs this to restart:
...
> Now I believe what is happening is "rndc stop" is hanging/timing out.
> This in turn causes the restart to fail, but leaves the old version of
> named in a state where it no longer answers DNS queries, causing a DNS
> service outage.
> 
> When I caught it in this state this time, I did a "strace" on the PID
> of named and it was stuck in FUTEX WAIT:
...
> Has anyone else experienced this problem?  Like I said, this is the
> 2nd or 3rd time this has happened to my systems.
> 
> I'll file a bug in Red Hat's bugzilla, but not having a support
> contract it might get ignored for 3 years.

I found some older bugs. This type of issue was fixed at least once
before, but there is still apparently a similar issue that remains
unresolved:

Fixed 5/2011: https://bugzilla.redhat.com/show_bug.cgi?id=623122
Duplicate:    https://bugzilla.redhat.com/show_bug.cgi?id=768702

Reported 9/2012, closed due to insufficient data:

https://bugzilla.redhat.com/show_bug.cgi?id=853714