Hi, We are facing a core issue in 4.0.2 version. Please find the GDB trace below #0 udp_rcv_loop () at udp_server.c:471 471 fromlen=sockaddru_len(bind_address->su); (gdb) bt #0 udp_rcv_loop () at udp_server.c:471 #1 0x0000000000475c14 in main_loop () at main.c:1851 #2 0x000000000047a98b in main (argc=<value optimized out>, argv=<value optimized out>) at main.c:2939 We have simulated this so many times in load mode. Machine details: Linux PLT-RA-RD-W167A.localdomain 2.6.18-308.el5 #1 SMP Fri Jan 27 17:17:51 EST 2012 x86_64 x86_64 x86_64 GNU/Linux Can anyone help me on this Regards Surendra