I wrote a program with Multithreading access the ABAddressBookCreate()'s instance,
then the program crash,in the same time all of the contacts information has been disappear.
now the contacts can add,modify and delete,but this log
Tue Aug 31 18:08:44 unknown com.apple.launchd[1] <Warning>: (com.apple.AddressBook) Throttling respawn: Will start in 10 seconds