dear :
       now i just register and unregister ,the kamailio stop ,why?
below is bebug:

DEBUG: <core> [parser/msg_parser.c:629]: parse_msg():  method:  <REGISTER>
 8(3563) DEBUG: <core> [parser/msg_parser.c:631]: parse_msg():  uri:     <sip:192.168.1.113>
 8(3563) DEBUG: <core> [parser/msg_parser.c:633]: parse_msg():  version: <SIP/2.0>
 8(3563) DEBUG: <core> [parser/parse_via.c:1284]: parse_via_param(): Found param type 235, <rport> = <n/a>; state=6
 8(3563) DEBUG: <core> [parser/parse_via.c:1284]: parse_via_param(): Found param type 232, <branch> = <z9hG4bKPjUpioznTxJADwiMJzDCFfcZD707rrtXpc>; state=16
 8(3563) DEBUG: <core> [parser/parse_via.c:2672]: parse_via(): end of header reached, state=5
 8(3563) DEBUG: <core> [parser/msg_parser.c:517]: parse_headers(): parse_headers: Via found, flags=2
 8(3563) DEBUG: <core> [parser/msg_parser.c:519]: parse_headers(): parse_headers: this is the first via
 8(3563) DEBUG: <core> [receive.c:152]: receive_msg(): After parse_msg...
 8(3563) DEBUG: <core> [receive.c:193]: receive_msg(): preparing to run routing scripts...
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=464 a=5 n=route
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=574 a=16 n=if
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=569 a=25 n=mf_process_maxfwd_header
 8(3563) DEBUG: maxfwd [mf_funcs.c:85]: is_maxfwd_present(): value = 70 
 8(3563) DEBUG: maxfwd [maxfwd.c:161]: process_maxfwd_header(): value 70 decreased to 16
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=579 a=16 n=if
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=574 a=26 n=sanity_check
 8(3563) DEBUG: <core> [parser/parse_to.c:799]: parse_to(): end of header reached, state=10
 8(3563) DEBUG: <core> [parser/msg_parser.c:190]: get_hdr_field(): DEBUG: get_hdr_field: <To> [27]; uri=[sip:elwin@192.168.1.113] 
 8(3563) DEBUG: <core> [parser/msg_parser.c:192]: get_hdr_field(): DEBUG: to body [<sip:elwin@192.168.1.113>
]
 8(3563) DEBUG: <core> [parser/msg_parser.c:170]: get_hdr_field(): get_hdr_field: cseq <CSeq>: <45784> <REGISTER>
 8(3563) DEBUG: <core> [parser/msg_parser.c:208]: get_hdr_field(): DEBUG: get_hdr_body : content_length=0
 8(3563) DEBUG: <core> [parser/msg_parser.c:106]: get_hdr_field(): found end of header
 8(3563) DEBUG: <core> [parser/parse_to.c:176]: parse_to_param(): DEBUG: add_param: tag=GHR.sqyfD0bmoQpfMxGFAVYJZaz2A67M
 8(3563) DEBUG: <core> [parser/parse_to.c:799]: parse_to(): end of header reached, state=29
 8(3563) DEBUG: sanity [mod_sanity.c:255]: w_sanity_check(): sanity checks result: 1
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=467 a=5 n=route
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=767 a=2 n=return
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=479 a=16 n=if
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=470 a=25 n=is_method
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=479 a=5 n=route
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=623 a=16 n=if
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=583 a=24 n=has_totag
 8(3563) DEBUG: siputils [checks.c:103]: has_totag(): no totag
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=483 a=24 n=t_check_trans
 8(3563) DEBUG: tm [t_lookup.c:1100]: t_check_msg(): DEBUG: t_check_msg: msg id=13 global id=12 T start=0xffffffffffffffff
 8(3563) DEBUG: tm [t_lookup.c:534]: t_lookup_request(): t_lookup_request: start searching: hash=161, isACK=0
 8(3563) DEBUG: tm [t_lookup.c:492]: matching_3261(): DEBUG: RFC3261 transaction matching failed
 8(3563) DEBUG: tm [t_lookup.c:716]: t_lookup_request(): DEBUG: t_lookup_request: no transaction found
 8(3563) DEBUG: tm [t_lookup.c:1169]: t_check_msg(): DEBUG: t_check_msg: msg id=13 global id=13 T end=(nil)
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=486 a=5 n=route
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=744 a=16 n=if
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=731 a=25 n=is_method
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=739 a=16 n=if
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=734 a=27 n=auth_check
 8(3563) DEBUG: auth_db [authorize.c:476]: auth_check(): realm [192.168.1.113] table [subscriber] flags [1]
 8(3563) DEBUG: auth [api.c:96]: pre_auth(): auth: digest-algo:  parsed value: 0
 8(3563) DEBUG: <core> [db_res.c:118]: db_new_result(): allocate 56 bytes for result set at 0x7f5a38e0ddf0
 8(3563) DEBUG: db_mysql [km_res.c:68]: db_mysql_get_columns(): 1 columns returned from the query
 8(3563) DEBUG: <core> [db_res.c:155]: db_allocate_columns(): allocate 8 bytes for result names at 0x7f5a38e0d710
 8(3563) DEBUG: <core> [db_res.c:165]: db_allocate_columns(): allocate 4 bytes for result types at 0x7f5a38e0d630
 8(3563) DEBUG: db_mysql [km_res.c:85]: db_mysql_get_columns(): allocate 16 bytes for RES_NAMES[0] at 0x7f5a38e0de50
 8(3563) DEBUG: db_mysql [km_res.c:92]: db_mysql_get_columns(): RES_NAMES(0x7f5a38e0de50)[0]=[password]
 8(3563) DEBUG: db_mysql [km_res.c:136]: db_mysql_get_columns(): use DB1_STRING result type
 8(3563) DEBUG: <core> [db_res.c:184]: db_allocate_rows(): allocate 16 bytes for rows at 0x7f5a38e0d600
 8(3563) DEBUG: <core> [db_row.c:119]: db_allocate_row(): allocate 32 bytes for row values at 0x7f5a38e0d780
 8(3563) DEBUG: <core> [db_val.c:117]: db_str2val(): converting STRING [elwin]
 8(3563) DEBUG: auth_db [authorize.c:196]: get_ha1(): HA1 string calculated: 34049bf85f5010d95bb0f9729b71f370
 8(3563) DEBUG: auth [api.c:211]: auth_check_response(): check_response: Our result = '5143b47433f1518159f7341d660de56a'
 8(3563) DEBUG: auth [api.c:218]: auth_check_response(): check_response: Authorization is OK
 8(3563) DEBUG: <core> [db_res.c:81]: db_free_columns(): freeing 1 columns
 8(3563) DEBUG: <core> [db_res.c:85]: db_free_columns(): freeing RES_NAMES[0] at 0x7f5a38e0de50
 8(3563) DEBUG: <core> [db_res.c:94]: db_free_columns(): freeing result names at 0x7f5a38e0d710
 8(3563) DEBUG: <core> [db_res.c:99]: db_free_columns(): freeing result types at 0x7f5a38e0d630
 8(3563) DEBUG: <core> [db_res.c:54]: db_free_rows(): freeing 1 rows
 8(3563) DEBUG: <core> [db_row.c:97]: db_free_row(): freeing row values at 0x7f5a38e0d780
 8(3563) DEBUG: <core> [db_res.c:62]: db_free_rows(): freeing rows at 0x7f5a38e0d600
 8(3563) DEBUG: <core> [db_res.c:136]: db_free_result(): freeing result set at 0x7f5a38e0ddf0
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=741 a=16 n=if
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=739 a=25 n=is_method
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=751 a=16 n=if
 8(3563) DEBUG: <core> [socket_info.c:589]: grep_sock_info(): grep_sock_info - checking if host==us: 13==9 && [192.168.1.113] == [127.0.0.1]
 8(3563) DEBUG: <core> [socket_info.c:593]: grep_sock_info(): grep_sock_info - checking if port 5060 (advertise 0) matches port 5060
 8(3563) DEBUG: <core> [socket_info.c:589]: grep_sock_info(): grep_sock_info - checking if host==us: 13==13 && [192.168.1.113] == [192.168.1.113]
 8(3563) DEBUG: <core> [socket_info.c:593]: grep_sock_info(): grep_sock_info - checking if port 5060 (advertise 0) matches port 5060
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=751 a=2 n=return
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=490 a=25 n=remove_hf
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=495 a=16 n=if
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=491 a=25 n=is_method
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=501 a=16 n=if
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=495 a=25 n=is_method
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=501 a=5 n=route
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=818 a=16 n=if
 8(3563) DEBUG: <core> [socket_info.c:589]: grep_sock_info(): grep_sock_info - checking if host==us: 13==9 && [192.168.1.113] == [127.0.0.1]
 8(3563) DEBUG: <core> [socket_info.c:593]: grep_sock_info(): grep_sock_info - checking if port 5060 (advertise 0) matches port 5060
 8(3563) DEBUG: <core> [socket_info.c:589]: grep_sock_info(): grep_sock_info - checking if host==us: 13==13 && [192.168.1.113] == [192.168.1.113]
 8(3563) DEBUG: <core> [socket_info.c:593]: grep_sock_info(): grep_sock_info - checking if port 5060 (advertise 0) matches port 5060
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=506 a=5 n=route
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=711 a=16 n=if
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=686 a=25 n=is_method
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=687 a=2 n=return
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=509 a=5 n=route
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=640 a=16 n=if
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=627 a=25 n=is_method
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=635 a=16 n=if
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=629 a=41 n=isflagset
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=638 a=16 n=if
 8(3563) ERROR: *** cfgtrace: c=[/usr/local/etc/kamailio/kamailio.cfg] l=635 a=25 n=save
 8(3563) DEBUG: registrar [reg_mod.c:444]: w_save2(): registrar/reg_mod.c w_save2 function
 8(3563) DEBUG: registrar [save.c:839]: save(): registrar/save.c save function
 8(3563) DEBUG: registrar [common.c:58]: extract_aor(): registrar/common.c extract_aor function
 8(3563) DEBUG: registrar [save.c:789]: add_contacts(): registrar/save.c add_contacts function
17(3577) DEBUG: <core> [tcp_main.c:3597]: handle_ser_child(): enter handle_ser_child
17(3577) : <core> [pass_fd.c:294]: receive_fd(): ERROR: receive_fd: EOF on 15
17(3577) DEBUG: <core> [tcp_main.c:3607]: handle_ser_child(): DBG: handle_ser_child: dead child 6, pid 3561 (shutting down?)
17(3577) DEBUG: <core> [io_wait.h:617]: io_watch_del(): DBG: io_watch_del (0x89bd40, 15, -1, 0x0) fd_no=22 called
 0(3554) ALERT: <core> [main.c:788]: handle_sigs(): child process 3561 exited by a signal 11
 0(3554) ALERT: <core> [main.c:791]: handle_sigs(): core was generated
 0(3554) INFO: <core> [main.c:803]: handle_sigs(): INFO: terminating due to SIGCHLD
15(3575) INFO: <core> [main.c:854]: sig_usr(): INFO: signal 15 received
14(3574) INFO: <core> [main.c:854]: sig_usr(): INFO: signal 15 received
 1(3556) INFO: <core> [main.c:854]: sig_usr(): INFO: signal 15 received
 2(3557) INFO: <core> [main.c:854]: sig_usr(): INFO: signal 15 received
 3(3558) INFO: <core> [main.c:854]: sig_usr(): INFO: signal 15 received
13(3572) INFO: <core> [main.c:854]: sig_usr(): INFO: signal 15 received
 5(3560) INFO: <core> [main.c:854]: sig_usr(): INFO: signal 15 received
12(3570) INFO: <core> [main.c:854]: sig_usr(): INFO: signal 15 received
16(3576) INFO: <core> [main.c:854]: sig_usr(): INFO: signal 15 received
 7(3562) INFO: <core> [main.c:854]: sig_usr(): INFO: signal 15 received
 4(3559) INFO: <core> [main.c:854]: sig_usr(): INFO: signal 15 received
11(3566) INFO: <core> [main.c:854]: sig_usr(): INFO: signal 15 received
17(3577) INFO: <core> [main.c:854]: sig_usr(): INFO: signal 15 received
 9(3564) INFO: <core> [main.c:854]: sig_usr(): INFO: signal 15 received
 8(3563) INFO: <core> [main.c:854]: sig_usr(): INFO: signal 15 received
10(3565) INFO: <core> [main.c:854]: sig_usr(): INFO: signal 15 received
 0(3554) DEBUG: registrar [reg_mod.c:622]: mod_destroy(): enter mod_destroy  
 0(3554) DEBUG: usrloc [urecord.c:327]: wb_timer(): Binding 'elwin','sip:elwin@192.168.1.112:5060' has expired
 0(3554) DEBUG: usrloc [ucontact.c:1286]: uldb_delete_attrs(): trying to delete location attributes
 0(3554) DEBUG: <core> [db_pool.c:102]: pool_remove(): removing connection from the pool
 0(3554) DEBUG: tm [t_funcs.c:118]: tm_shutdown(): DEBUG: tm_shutdown : start
 0(3554) DEBUG: tm [t_funcs.c:121]: tm_shutdown(): DEBUG: tm_shutdown : emptying hash table
 0(3554) DEBUG: tm [t_funcs.c:123]: tm_shutdown(): DEBUG: tm_shutdown : removing semaphores
 0(3554) DEBUG: tm [t_funcs.c:125]: tm_shutdown(): DEBUG: tm_shutdown : destroying tmcb lists
 0(3554) DEBUG: tm [t_funcs.c:128]: tm_shutdown(): DEBUG: tm_shutdown : done
 0(3554) DEBUG: <core> [mem/shm_mem.c:242]: shm_mem_destroy(): shm_mem_destroy
 0(3554) DEBUG: <core> [mem/shm_mem.c:245]: shm_mem_destroy(): destroying the shared memory lock
 0(3554) DEBUG: <core> [main.c:807]: handle_sigs(): terminating due to SIGCHLD