[Pdns-users] recursor and HUP

[Charles Sprickman]

On Dec 25, 2012, at 11:38 PM, Charles Sprickman wrote:

> Hello,
> 
> I'm not seeing anything in the documentation about what sending a HUP should do to the recursor, but here I'm seeing it kill the process.
> 
> It gets a bit stranger than that though…  We had a log rotation rule setup that was sending the recursor a HUP at midnight.  This was unneeded since syslog is how pdns logs, so I'm not sure why we even had that there.  That said, two identical boxes (same hardware, OS+version, same build of the same recursor pkg) were acting differently.  The one that died on a HUP was where I was originally fiddling with controlsocket owner/location/mode, the one that did not die on a HUP was untouched, just running with defaults.
> 
> Removing the socket after stopping the recursor and letting it set perms itself resulted in mode 700 and both now die on a HUP.  However trying 750 and 755 is not "fixing" it.  I'm suspicious of the socket owner/perms only because that's the only thing I know was originally different between the two boxes.  Setting "trace=on" in the config file gives me no further information.  In both cases the recursor just exits without logging anything.
> 
> OS is FreeBSD 8.3, recursor is 3.3.
> 
> What else can I look at to track this down?

Another datapoint…  While looking at bugs in trac, I saw this one:

http://wiki.powerdns.com/trac/changeset/988

On a clean shutdown, I always see the recursor leaving a pidfile and control socket in /var/run after the process exits.  Not sure if that's related at all, but it almost smells like something is a bit odd with signal handling.

Thanks,

Charles

> Thanks,
> 
> Charles
> 
> -- 
> Charles Sprickman
> NetEng/SysAdmin
> Bway.net - New York's Best Internet www.bway.net
> spork at bway.net - 212.655.9344
> 
> 
> 
> 
> 
> 
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