You have to locate the core file, it should be in / or in the folder the OS was configured to write core dumps (usually a file named core or core.7066 or something starting with core). Then get the backtrace from it with gdb:

``` gdb /path/to/kamailio /path/to/corefile bt full ```

Add the output to this issue.

You are also running the master branch with version 4.3.0-pre0, at this moment the latest is 4.3.0-pre1, which includes some more fixes. Might be good to upgrade. Be aware that you may need to upgrade database schema, see:

* http://www.kamailio.org/wiki/install/upgrade/stable-to-devel

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Going to close the issue as it was about devel version, testing hasn't reported any similar issue and no follow up was made in three weeks. If there is anything new related to this issue, re-open.

--- Reply to this email directly or view it on GitHub: https://github.com/kamailio/kamailio/issues/158#issuecomment-108386914

Hi, we had this same kind of crash last night:

``` kamailio[19419]: ERROR: <core> [io_wait.h:394]: io_watch_add(): trying to overwrite entry 564 watched for 1 in the hash(564, 2, 0x7fc348f5b960) with (564, 2, 0x7fc34aca4420) kamailio[19419]: CRITICAL: <core> [tcp_main.c:4049]: handle_new_connect(): failed to add new socket to the fd list kamailio[19419]: CRITICAL: <core> [pass_fd.c:293]: receive_fd(): EOF on 125 kamailio[19324]: ALERT: <core> [main.c:784]: handle_sigs(): child process 19417 exited by a signal 11 kamailio[19324]: ALERT: <core> [main.c:787]: handle_sigs(): core was generated ```

We have the backtrace:

``` #0 0x0000000000566906 in local_timer_list_expire (l=0xa37f80 <tcp_reader_ltimer>, t=1559677467, h=0xa42138 <tcp_reader_ltimer+41400>) at local_timer.c:214 #1 0x0000000000566a60 in local_timer_expire (h=0xa37f80 <tcp_reader_ltimer>, t=1559677467) at local_timer.c:243 #2 0x0000000000566d0a in local_timer_run (lt=0xa37f80 <tcp_reader_ltimer>, saved_ticks=1559677469) at local_timer.c:266 #3 0x00000000005f94fe in tcp_reader_timer_run () at tcp_read.c:1713 #4 0x00000000005f986f in tcp_receive_loop (unix_sock=129) at tcp_read.c:1765 #5 0x00000000004e75d8 in tcp_init_children () at tcp_main.c:4880 #6 0x0000000000517828 in main_loop () at main.c:1714 #7 0x000000000051caec in main (argc=15, argv=0x7fff764de168) at main.c:2581 ``` local_timer.c:214 corresponds to:

``` while(h->next!=(struct timer_ln*)h){ tl=h->next; => _timer_rm_list(tl); /* detach */ tl->next=tl->prev=0; /* debugging */ /*FIXME: process tcpconn */ ```

We are running kamailio 4.2.4 (with backports of tcpops module and ursloc's close_expired_tcp new feature)

Any idea?

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Thanks, we will update our kamailio to include it. We don't use tm suspend/continue on this particular box though.

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Closed #158.

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