reject reply

[hannibal]

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!!