reject reply

hi, everyone, i got these logs: ---------------------------------------------------------------------------------------------- modcall: group authorize returns reject for request 37 Delaying request 37 for 1 seconds Finished request 37 // why finished request, but not send reply to client?? Going to the next request Thread 6 waiting to be assigned a request --- Walking the entire request list --- Sending Access-Reject of id 1 to 127.0.0.1:32874 // Sending this message, i think is because of process time out. Cleaning up request 37 ID 1 with timestamp 435cf28f --------------------------------------------------------------------------------------------- what happened behind? i'm a completely newbie. can someone tell me? thank you!!