HI I have following issue ( kernel 3.2.28):
a device sending udp traffic to UDP Port x -> my udp app ( listen on port x) at first, it was working. my app did get udp traffic. after a while, strace showed that my app stuck at recvfrom, no udp traffic but tcpdump showed the udp traffic still coming. Even if I restart my app, strace showed that no udp traffic at my app. it seems the kernel did not deliver the udp packet to my app. I have to restart NIC interface, then I could see udp traffic received at my app. What could be wrong? thanks. min
