failed while receiving responses: end of file

[Carl Byington]

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I have a problem with one zone, that does not appear with other zones
that have almost identical zone files.

Mar 21 16:27:53 ns1 named[7390]: transfer of 'k12ebooks.com/IN' from
205.147.40.34#53: failed while receiving responses: end of file
Mar 21 16:27:53 ns1 named[7390]: transfer of 'k12ebooks.com/IN' from
205.147.40.34#53: end of transfer

The roots are still handing out the register.com servers for
k12ebooks.com, but we will eventually change that to
{ns,ns1,ns2}.five-ten-sg.com. The master on ns.five-ten-sg.com seems
to be running ok, but ns1 fails to transfer the zone with the above
error messages. A manual 'dig @ns k12ebooks.com axfr' returns the
expected data.

Any clues?
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