PID:

Process::  ID=0 PID=9950 Type=attendant
Process::  ID=1 PID=9962 Type=event-route handler
Process::  ID=2 PID=9963 Type=RTPP timeout receiver
Process::  ID=3 PID=9964 Type=MI Datagram
Process::  ID=4 PID=9966 Type=MI FIFO
Process::  ID=5 PID=9968 Type=time_keeper
Process::  ID=6 PID=9969 Type=timer
Process::  ID=7 PID=9970 Type=SIP receiver udp:213.170.100.146:5060
Process::  ID=8 PID=9971 Type=SIP receiver udp:213.170.100.146:5060
Process::  ID=9 PID=9973 Type=SIP receiver udp:213.170.100.146:5060
Process::  ID=10 PID=9974 Type=SIP receiver udp:213.170.100.146:5060
Process::  ID=11 PID=9977 Type=SIP receiver udp:213.170.100.146:5060
Process::  ID=12 PID=9978 Type=SIP receiver udp:213.170.100.146:5060
Process::  ID=13 PID=9981 Type=SIP receiver udp:213.170.100.146:5060
Process::  ID=14 PID=9982 Type=SIP receiver udp:213.170.100.146:5060
Process::  ID=15 PID=9984 Type=SIP receiver udp:213.170.100.146:5068
Process::  ID=16 PID=9985 Type=SIP receiver udp:213.170.100.146:5068
Process::  ID=17 PID=9989 Type=SIP receiver udp:213.170.100.146:5068
Process::  ID=18 PID=9990 Type=SIP receiver udp:213.170.100.146:5068
Process::  ID=19 PID=9991 Type=SIP receiver udp:213.170.100.146:5068
Process::  ID=20 PID=9993 Type=SIP receiver udp:213.170.100.146:5068
Process::  ID=21 PID=9995 Type=SIP receiver udp:213.170.100.146:5068
Process::  ID=22 PID=9999 Type=SIP receiver udp:213.170.100.146:5068

LOG:

Mar 28 15:49:32 opensips-mirror /usr/local/opensips2.1/sbin/opensips[9950]: INFO:core:handle_sigs: child process 9966 exited by a signal 11
Mar 28 15:49:32 opensips-mirror /usr/local/opensips2.1/sbin/opensips[9950]: INFO:core:handle_sigs: core was generated
Mar 28 15:49:32 opensips-mirror /usr/local/opensips2.1/sbin/opensips[9950]: INFO:core:handle_sigs: terminating due to SIGCHLD
Mar 28 15:49:32 opensips-mirror /usr/local/opensips2.1/sbin/opensips[9982]: INFO:core:sig_usr: signal 15 received
Mar 28 15:49:32 opensips-mirror /usr/local/opensips2.1/sbin/opensips[9964]: INFO:core:sig_usr: signal 15 received

GDB (bt full):
#0  0x000000000050c2fc in ?? ()
No symbol table info available.
#1  0x0000000000000020 in ?? ()
No symbol table info available.
#2  0x000000000050c42e in ?? ()
No symbol table info available.
#3  0x0000000000000400 in ?? ()
No symbol table info available.
#4  0x00007f36cd10b310 in ?? ()
No symbol table info available.
#5  0x0000000000000014 in ?? ()
No symbol table info available.
#6  0x00000000004de9e6 in ?? ()
No symbol table info available.
#7  0x00007f36c6858388 in ?? ()
No symbol table info available.
#8  0x00000000004de788 in ?? ()
No symbol table info available.
#9  0x00007f36ed0c9f58 in ?? ()
No symbol table info available.
#10 0x00007f36ed0c9f78 in ?? ()
No symbol table info available.
#11 0x0000000000000000 in ?? ()
No symbol table info available.