When BIND 9.9.0 was released, we started converting our DNSSEC-signed zones to 
inline signing.

Everything went smoothly with all but one of our zones ("pesky.zone", below). 
With that zone, after named signed it and completed an AXFR-style IXFR to each 
of four slaves, it proceeded to start repeatedly incrementing the SOA serial 
and retransferring. By the time we stopped it, named had incremented the serial 
almost 200 times, with corresponding IXFRs.

There is nothing different about this zone from any of our others, except that 
it contains somewhat more RRs. (There are no dynamic updates permitted, no DS 
records for delegated subdomains, nothing else that we could think of to 
explain the behavior.)

Why would named go crazy when we configure inline signing for this one zone, 
when all of our other zones are working fine with inline signing?

        Mar  2 14:33:14 ns0 named[806928]: received control channel command 
'reconfig'
        Mar  2 14:33:14 ns0 named[806928]: loading configuration from 
'/etc/named.conf'
        Mar  2 14:33:14 ns0 named[806928]: reading built-in trusted keys from 
file '/etc/bind.keys'
        Mar  2 14:33:14 ns0 named[806928]: using default UDP/IPv4 port range: 
[1024, 65535]
        Mar  2 14:33:14 ns0 named[806928]: using default UDP/IPv6 port range: 
[1024, 65535]
        Mar  2 14:33:14 ns0 named[806928]: prefix length for ::1 is unknown 
(assume 128)
        Mar  2 14:33:14 ns0 named[806928]: sizing zone task pool based on 207 
zones
        Mar  2 14:33:15 ns0 named[806928]: zone pesky.zone/IN: (master) removed
        Mar  2 14:33:15 ns0 named[806928]: prefix length for ::1 is unknown 
(assume 128)
        Mar  2 14:33:15 ns0 named[806928]: reloading configuration succeeded
        Mar  2 14:33:15 ns0 named[806928]: zone pesky.zone/IN (unsigned): 
loaded serial 2012030200
        Mar  2 14:33:15 ns0 named[806928]: any newly configured zones are now 
loaded
        ...
        Mar  2 14:33:15 ns0 named[806928]: zone pesky.zone/IN (signed): loaded 
serial 2012030200
        Mar  2 14:33:15 ns0 daemon:err|error named[806928]: zone pesky.zone/IN 
(signed): receive_secure_serial: unchanged
        Mar  2 14:33:15 ns0 named[806928]: zone pesky.zone/IN (signed): 
reconfiguring zone keys
        Mar  2 14:33:16 ns0 named[806928]: zone pesky.zone/IN (signed): next 
key event: 02-Mar-2012 15:33:15.740
        Mar  2 14:33:16 ns0 named[806928]: client [ns3]#42941/key ns0-ns3 
(pesky.zone): transfer of 'pesky.zone/IN': AXFR-style IXFR started: TSIG ns0-ns3
        Mar  2 14:33:17 ns0 named[806928]: client [ns4]#48695/key ns0-ns4 
(pesky.zone): transfer of 'pesky.zone/IN': AXFR-style IXFR started: TSIG ns0-ns4
        Mar  2 14:33:17 ns0 named[806928]: client [ns2]#52228/key ns0-ns2 
(pesky.zone): transfer of 'pesky.zone/IN': AXFR-style IXFR started: TSIG ns0-ns2
        Mar  2 14:33:17 ns0 named[806928]: client [ns3]#42941/key ns0-ns3 
(pesky.zone): transfer of 'pesky.zone/IN': AXFR-style IXFR ended
        Mar  2 14:33:17 ns0 named[806928]: client [ns1]#51606/key ns0-ns1 
(pesky.zone): transfer of 'pesky.zone/IN': AXFR-style IXFR started: TSIG ns0-ns1
        Mar  2 14:33:18 ns0 named[806928]: client [ns4]#48695/key ns0-ns4 
(pesky.zone): transfer of 'pesky.zone/IN': AXFR-style IXFR ended
        Mar  2 14:33:18 ns0 named[806928]: client [ns2]#52228/key ns0-ns2 
(pesky.zone): transfer of 'pesky.zone/IN': AXFR-style IXFR ended
        Mar  2 14:33:18 ns0 named[806928]: client [ns1]#51606/key ns0-ns1 
(pesky.zone): transfer of 'pesky.zone/IN': AXFR-style IXFR ended
        Mar  2 14:33:21 ns0 named[806928]: client [ns3]#42944/key ns0-ns3 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR started: TSIG ns0-ns3
        Mar  2 14:33:21 ns0 named[806928]: client [ns3]#42944/key ns0-ns3 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR ended
        Mar  2 14:33:21 ns0 named[806928]: client [ns2]#52229/key ns0-ns2 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR started: TSIG ns0-ns2
        Mar  2 14:33:21 ns0 named[806928]: client [ns4]#48700/key ns0-ns4 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR started: TSIG ns0-ns4
        Mar  2 14:33:21 ns0 named[806928]: client [ns1]#51607/key ns0-ns1 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR started: TSIG ns0-ns1
        Mar  2 14:33:22 ns0 named[806928]: client [ns2]#52229/key ns0-ns2 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR ended
        Mar  2 14:33:22 ns0 named[806928]: client [ns4]#48700/key ns0-ns4 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR ended
        Mar  2 14:33:22 ns0 named[806928]: client [ns1]#51607/key ns0-ns1 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR ended
        Mar  2 14:33:26 ns0 named[806928]: client [ns3]#42945/key ns0-ns3 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR started: TSIG ns0-ns3
        Mar  2 14:33:26 ns0 named[806928]: client [ns3]#42945/key ns0-ns3 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR ended
        Mar  2 14:33:26 ns0 named[806928]: client [ns2]#52230/key ns0-ns2 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR started: TSIG ns0-ns2
        Mar  2 14:33:26 ns0 named[806928]: client [ns4]#48702/key ns0-ns4 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR started: TSIG ns0-ns4
        Mar  2 14:33:26 ns0 named[806928]: client [ns1]#51608/key ns0-ns1 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR started: TSIG ns0-ns1
        Mar  2 14:33:27 ns0 named[806928]: client [ns4]#48702/key ns0-ns4 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR ended
        Mar  2 14:33:27 ns0 named[806928]: client [ns2]#52230/key ns0-ns2 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR ended
        Mar  2 14:33:27 ns0 named[806928]: client [ns1]#51608/key ns0-ns1 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR ended
        Mar  2 14:33:31 ns0 named[806928]: client [ns3]#42947/key ns0-ns3 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR started: TSIG ns0-ns3
        Mar  2 14:33:31 ns0 named[806928]: client [ns3]#42947/key ns0-ns3 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR ended
        Mar  2 14:33:31 ns0 named[806928]: client [ns1]#51609/key ns0-ns1 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR started: TSIG ns0-ns1
        Mar  2 14:33:31 ns0 named[806928]: client [ns4]#48703/key ns0-ns4 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR started: TSIG ns0-ns4
        Mar  2 14:33:31 ns0 named[806928]: client [ns2]#52231/key ns0-ns2 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR started: TSIG ns0-ns2
        Mar  2 14:33:32 ns0 named[806928]: client [ns4]#48703/key ns0-ns4 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR ended
        Mar  2 14:33:32 ns0 named[806928]: client [ns1]#51609/key ns0-ns1 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR ended
        Mar  2 14:33:32 ns0 named[806928]: client [ns2]#52231/key ns0-ns2 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR ended
        Mar  2 14:33:36 ns0 named[806928]: client [ns3]#42952/key ns0-ns3 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR started: TSIG ns0-ns3
        Mar  2 14:33:36 ns0 named[806928]: client [ns3]#42952/key ns0-ns3 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR ended
        Mar  2 14:33:37 ns0 named[806928]: client [ns2]#52232/key ns0-ns2 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR started: TSIG ns0-ns2
        Mar  2 14:33:37 ns0 named[806928]: client [ns4]#48706/key ns0-ns4 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR started: TSIG ns0-ns4
        Mar  2 14:33:37 ns0 named[806928]: client [ns1]#51610/key ns0-ns1 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR started: TSIG ns0-ns1
        Mar  2 14:33:37 ns0 named[806928]: client [ns2]#52232/key ns0-ns2 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR ended
        Mar  2 14:33:37 ns0 named[806928]: client [ns4]#48706/key ns0-ns4 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR ended
        Mar  2 14:33:37 ns0 named[806928]: client [ns1]#51610/key ns0-ns1 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR ended
        Mar  2 14:33:41 ns0 named[806928]: client [ns3]#42954/key ns0-ns3 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR started: TSIG ns0-ns3
        Mar  2 14:33:42 ns0 named[806928]: client [ns3]#42954/key ns0-ns3 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR ended
        Mar  2 14:33:42 ns0 named[806928]: client [ns4]#48709/key ns0-ns4 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR started: TSIG ns0-ns4
        Mar  2 14:33:42 ns0 named[806928]: client [ns2]#52233/key ns0-ns2 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR started: TSIG ns0-ns2
        Mar  2 14:33:42 ns0 named[806928]: client [ns1]#51611/key ns0-ns1 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR started: TSIG ns0-ns1
        Mar  2 14:33:42 ns0 named[806928]: client [ns4]#48709/key ns0-ns4 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR ended
        Mar  2 14:33:42 ns0 named[806928]: client [ns2]#52233/key ns0-ns2 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR ended
        Mar  2 14:33:42 ns0 named[806928]: client [ns1]#51611/key ns0-ns1 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR ended
        Mar  2 14:33:46 ns0 named[806928]: client [ns3]#42957/key ns0-ns3 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR started: TSIG ns0-ns3
        Mar  2 14:33:47 ns0 named[806928]: client [ns3]#42957/key ns0-ns3 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR ended
        Mar  2 14:33:47 ns0 named[806928]: client [ns1]#51612/key ns0-ns1 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR started: TSIG ns0-ns1
        Mar  2 14:33:47 ns0 named[806928]: client [ns2]#52234/key ns0-ns2 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR started: TSIG ns0-ns2
        Mar  2 14:33:47 ns0 named[806928]: client [ns4]#48710/key ns0-ns4 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR started: TSIG ns0-ns4
        Mar  2 14:33:47 ns0 named[806928]: client [ns1]#51612/key ns0-ns1 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR ended
        Mar  2 14:33:47 ns0 named[806928]: client [ns4]#48710/key ns0-ns4 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR ended
        Mar  2 14:33:47 ns0 named[806928]: client [ns2]#52234/key ns0-ns2 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR ended
        Mar  2 14:33:52 ns0 named[806928]: client [ns3]#42960/key ns0-ns3 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR started: TSIG ns0-ns3
        Mar  2 14:33:52 ns0 named[806928]: client [ns3]#42960/key ns0-ns3 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR ended
        Mar  2 14:33:52 ns0 named[806928]: client [ns1]#51613/key ns0-ns1 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR started: TSIG ns0-ns1
        Mar  2 14:33:52 ns0 named[806928]: client [ns4]#48713/key ns0-ns4 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR started: TSIG ns0-ns4
        Mar  2 14:33:52 ns0 named[806928]: client [ns2]#52235/key ns0-ns2 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR started: TSIG ns0-ns2
        Mar  2 14:33:52 ns0 named[806928]: client [ns4]#48713/key ns0-ns4 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR ended
        Mar  2 14:33:52 ns0 named[806928]: client [ns1]#51613/key ns0-ns1 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR ended
        Mar  2 14:33:52 ns0 named[806928]: client [ns2]#52235/key ns0-ns2 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR ended
        Mar  2 14:33:57 ns0 named[806928]: client [ns3]#42962/key ns0-ns3 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR started: TSIG ns0-ns3
        Mar  2 14:33:57 ns0 named[806928]: client [ns3]#42962/key ns0-ns3 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR ended
        Mar  2 14:33:57 ns0 named[806928]: client [ns1]#51614/key ns0-ns1 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR started: TSIG ns0-ns1
        Mar  2 14:33:57 ns0 named[806928]: client [ns4]#48715/key ns0-ns4 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR started: TSIG ns0-ns4
        Mar  2 14:33:57 ns0 named[806928]: client [ns2]#52236/key ns0-ns2 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR started: TSIG ns0-ns2
        Mar  2 14:33:58 ns0 named[806928]: client [ns4]#48715/key ns0-ns4 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR ended
        Mar  2 14:33:58 ns0 named[806928]: client [ns1]#51614/key ns0-ns1 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR ended
        Mar  2 14:33:58 ns0 named[806928]: client [ns2]#52236/key ns0-ns2 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR ended
        Mar  2 14:34:02 ns0 named[806928]: client [ns3]#42963/key ns0-ns3 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR started: TSIG ns0-ns3
        Mar  2 14:34:02 ns0 named[806928]: client [ns3]#42963/key ns0-ns3 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR ended
        Mar  2 14:34:02 ns0 named[806928]: client [ns4]#48718/key ns0-ns4 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR started: TSIG ns0-ns4
        Mar  2 14:34:02 ns0 named[806928]: client [ns2]#52237/key ns0-ns2 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR started: TSIG ns0-ns2
        Mar  2 14:34:02 ns0 named[806928]: client [ns1]#51615/key ns0-ns1 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR started: TSIG ns0-ns1
        Mar  2 14:34:03 ns0 named[806928]: client [ns4]#48718/key ns0-ns4 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR ended
        Mar  2 14:34:03 ns0 named[806928]: client [ns2]#52237/key ns0-ns2 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR ended
        Mar  2 14:34:03 ns0 named[806928]: client [ns1]#51615/key ns0-ns1 
(pesky.zone): transfer of 'pesky.zone/IN': IXFR ended
        ....


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