Hi,

I'm working with Kamailio 1.5 (rev 5968) and from time to time kamailio freezes and stops processing messages. Kamailio is working only in UDP. I really don't know in which conditions this problem is happening: it happens both in high and low load.
Here is a backtrace of one of the UDP working processes when kamailio is frozen (all the other UDP process backtraces look similar) :

#0  0xb7fdf410 in ?? ()
#1  0xbfbfec28 in ?? ()
#2  0x00000001 in ?? ()
#3  0xa7392ad0 in ?? ()
#4  0xb7f3b4ac in sched_yield () from /lib/tls/i686/cmov/libc.so.6
#5  0xb7ba9463 in lock_hash (i=10361) at ../../mem/../fastlock.h:182
#6  0xb7bc4587 in t_lookup_request (p_msg=0x823fc70, leave_new_locked=1) at t_lookup.c:468
#7  0xb7bc54ae in t_newtran (p_msg=0x823fc70) at t_lookup.c:1124
#8  0xb7bb740c in t_relay_to (p_msg=0x823fc70, proxy=0x0, flags=1) at t_funcs.c:212
#9  0xb7bb8f6c in t_replicate (p_msg=0x823fc70, dst=0x817cdf8, flags=1) at t_fwd.c:763
#10 0xb7bc7fce in w_t_replicate (p_msg=0x823fc70, dst=0x817cdf8 "\230ê\030\b\016", flags=0x0) at tm.c:957
#11 0x0805301c in do_action (a=0x818eb20, msg=0x823fc70) at action.c:874
#12 0x080557aa in run_action_list (a=0x818eb20, msg=0x823fc70) at action.c:145
#13 0x08054491 in do_action (a=0x818ec78, msg=0x823fc70) at action.c:746
#14 0x080557aa in run_action_list (a=0x818c940, msg=0x823fc70) at action.c:145
#15 0x08053efb in do_action (a=0x81b38e0, msg=0x823fc70) at action.c:120
#16 0x080557aa in run_action_list (a=0x81b3878, msg=0x823fc70) at action.c:145
#17 0x08054491 in do_action (a=0x81b5f00, msg=0x823fc70) at action.c:746
#18 0x080557aa in run_action_list (a=0x81b5f00, msg=0x823fc70) at action.c:145
#19 0x08054f2d in do_action (a=0x81b5f68, msg=0x823fc70) at action.c:752
#20 0x080557aa in run_action_list (a=0x81b5f68, msg=0x823fc70) at action.c:145
#21 0x08054f2d in do_action (a=0x81b5fd0, msg=0x823fc70) at action.c:752
#22 0x080557aa in run_action_list (a=0x81aefd0, msg=0x823fc70) at action.c:145
#23 0x08053efb in do_action (a=0x818bc08, msg=0x823fc70) at action.c:120
#24 0x080557aa in run_action_list (a=0x8187910, msg=0x823fc70) at action.c:145
#25 0x08055b43 in run_top_route (a=0x8187910, msg=0x823fc70) at action.c:120
#26 0x0808c659 in receive_msg (
    buf=0x8158040 "REGISTER sip:xxxxxxxxxxx.com SIP/2.0\r\nFrom: <sip:xxxxxx@xxxxxxxxxxxx.com>;tag=as516fcce2\r\nTo: <sip:xxxxxxx@xxxxxxxxxxxx.com>\r\nCall-ID: 01e4ea8e185c85332ea68874543c810e@xxxxxxxxxxxxxx.com\r\nCSeq: 383 REGISTER\r\nVia: SIP"..., len=794, rcv_info=0xbfc004d4) at receive.c:175
#27 0x080c3ea3 in udp_rcv_loop () at udp_server.c:449
#28 0x0806e394 in main (argc=9, argv=0xbfc006b4) at main.c:774

Any idea of what might be happening?

Best regards,

Santi

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