What does "deleted from unreachable cache" mean?

[Michael Hoskins (michoski)]

-----Original Message-----

From: Peter Olsson <pol at leissner.se>
Date: Thursday, August 2, 2012 10:25 AM
To: Cathy Almond <cathya at isc.org>
Cc: "bind-users at lists.isc.org" <bind-users at lists.isc.org>
Subject: Re: What does "deleted from unreachable cache" mean?

>Excellent information, thanks!

Agreed.  I really appreciate the effort ISC has put into the KB.

>However, it is worrying that the master sometimes is unreachable.
>Is there some way I can make the slave server log, with timestamp,
>what zone it was trying to refresh when it failed?

Not sure if you've already tried, but do you have xfer logging enabled?

logging {

<snip>

	channel audit_log {
    
		file "/var/named/bind/named.log";
		severity debug;
		print-time yes;
    
	};


<snip>

	category xfer-in { audit_log; };
	category xfer-out { audit_log; };
	category notify { audit_log; };
	category network { audit_log; };
	category update { audit_log; };
	// might want this to debug...
	//category queries { audit_log; };

};