multi-master and ixfr-from-differences: failed: new serial (2010060900) out of range"

[Matus UHLAR - fantomas]

Hello,

I run slaves for root zone on two machines, they behave as one of masters
for each other and for all our resurcive servers providing ixfr 
 (I work for an ISP so I think
it's feasible for us) and I ocationally get these error in log file:

Jun  9 23:11:58 mydb02 named[1427]: general: error: zone ./IN: ixfr-from-differences: failed: new serial (2010060900) out of range [2010060901 - 4157544547]
Jun  9 23:11:58 mydb02 named[1427]: xfer-in: error: transfer of './IN' from 192.228.79.201#53: failed while receiving responses: out of range
Jun  9 23:11:58 mydb02 named[1427]: xfer-in: info: transfer of './IN' from 192.228.79.201#53: Transfer completed: 2 messages, 3564 records, 112157 bytes, 1.812 secs (61896 bytes/sec)

Jun  9 23:11:59 mydb02 named[1427]: general: info: zone ./IN: transferred serial 2010060901
Jun  9 23:11:59 mydb02 named[1427]: xfer-in: info: transfer of './IN' from 192.5.5.241#53: Transfer completed: 3 messages, 3564 records, 125268 bytes, 0.522 secs (239977 bytes/sec)
Jun  9 23:11:59 mydb02 named[1427]: notify: info: zone ./IN: sending notifies (serial 2010060901)

I wonder what should this mean. I have turned multi-master yes for this zone
so I expected that BIND should be quiet if the SOA on master is "smaller".

However this looks like BIND notices higher serial on one of masters, but
then tried to fetch from different master where the SOA hasn't changed yet.

Is ther an bug/issue with multiple masters configuration?
-- 
Matus UHLAR - fantomas, uhlar at fantomas.sk ; http://www.fantomas.sk/
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