[Opendnssec-user] zone.xfrd-state file

[Catalin Leanca]

Hello,

I'm using DNS input/output adapter for my zone. After "ods-control stop" 
in /tmp directory
appears a file called zone.xfrd-state and the following input axfr/ixfr 
is not working
anymore. In log files there is no indication even if i use signer 
verbosity 5.
After manually deleting the file and restarting daemons input transfers 
work again.
Is this the normal operation ? If not, how to avoid this ? That is the 
purpose of this file ?

PS: ODS version 1.4.5

Thanks,
Catalin L.