I have a pair of servers running the dhcp3-server package using the failover
funcationality. Periodically I get log entries like the following:

Jan  2 16:27:00 artemis dhcpd: DHCPDISCOVER from 00:24:14:2e:15:19 via
134.173.131.254: peer holds all free leases

That repeats with a high frequency suggesting that the client isn't getting
assigned an address. When I look at the pool statistics both servers in the
pair have a large number of free addresses:

Jan  2 16:25:50 artemis dhcpd: balancing pool 9653d48 134.173.130/23  total 470  free 227  backup 224  lts -1  max-own (+/-)45
Jan  2 16:25:50 artemis dhcpd: balanced pool 9653d48 134.173.130/23  total 470  free 227  backup 224  lts -1  max-misbal 68

Relevant failover declaration information:

Primary
=======
  max-response-delay 180;
  mclt 1800;
  split 128;
  load balance max seconds 3;

Secondary
=========
  max-response-delay 180;
  load balance max seconds 3;

(I've ommited [peer] address/port declaration information.)

Let me know what other data will be helpful.

After some seemingly unrelated troubleshooting this morning, I figured
out some additional data. I have a class defined to block certain types
of devices from getting IPs in certain subnets. (This was done so if a
device was plugged in incorrectly, it wouldn't come up and presumably it
would get identified/fixed reasonably quickly.) In this case the devices
I've been seeing reporting that error were members of that class, which
was denied access to that pool. As a result, it looks like the issue is
more of an issue with a bad/incorrect error message. The current message
implies it's a problem with the peer setup. Perhaps something along the
lines of "Jan  2 16:27:00 artemis dhcpd: DHCPDISCOVER from
00:24:14:2e:15:19 via 134.173.131.254: client member of class denied
access to pool" or something like that would be helpful.

Dear submitter,

as the package isc-dhcp has just been removed from the Debian archive
unstable we hereby close the associated bug reports.  We are sorry
that we couldn't deal with your issue properly.

For details on the removal, please see https://bugs.debian.org/1143544

The version of this package that was in Debian prior to this removal
can still be found using https://snapshot.debian.org/.

Please note that the changes have been done on the master archive and
will not propagate to any mirrors until the next dinstall run at the
earliest.

This message was generated automatically; if you believe that there is
a problem with it please contact the archive administrators by mailing
ftpmaster@ftp-master.debian.org.

Debian distribution maintenance software
pp.
Thorsten Alteholz (the ftpmaster behind the curtain)