With some name server implementations, you can limit the amount of time that an outbound zone transfer is allowed to run. Setting this time interval to a value that is too short can have adverse affects on ADNR's ability to communicate with the name server. ADNR must request full zone transfers from the name servers it manages. If the period of time allowed for a zone transfer is shorter than the amount of time it normally takes to transfer an ADNR-managed zone, ADNR cannot successfully manage that zone; adjust the name server configuration to provide adequate time for a full zone transfer.
For the BIND 9 name server, the amount of time to allow for an outbound zone transfer is specified on the max-transfer-time-out option.