I have presence service with RLS on opensips 1.7.1 stable svn revision 8695. I have noticed if address book resource list contains more 300 contacts and if i try to subscribe that address book, the subscription requests goes successful but when opensips tries to send first NOTIFY to sip client with all addresses and their initial presence, the sending UDP socket fails with following error.
Feb 13 13:48:16 sip-service: ERROR:core:udp_send: sendto(sock,0x97ac2140,223857,0,0x97ac1290,16): Message too long(90)
Feb 13 13:48:16 sip-service: ERROR:tm:msg_send: udp_send failed
and NOTIFY with presence event never arrives.