[sr-dev] [tracker] Task opened: FIFO deadlock after dispatcher reload

sip-router bugtracker at sip-router.org
Fri Mar 1 22:25:25 CET 2013


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A new Flyspray task has been opened.  Details are below. 

User who did this - Dmitry (dmdm21) 

Attached to Project - sip-router
Summary - FIFO deadlock after dispatcher reload
Task Type - Bug Report
Category - Core
Status - Unconfirmed
Assigned To - 
Operating System - Linux
Severity - High
Priority - Normal
Reported Version - 3.3
Due in Version - Undecided
Due Date - Undecided
Details - kamailio-3.3.4

/usr/local/kamailio/sbin/kamctl fifo ds_reload
After couple of reloads FIFO interface stops responding.

After that command like bellow hangs.
/usr/local/kamailio/sbin/kamctl fifo ds_list


Normaly when FIFO is alive the process is running:

# strace -p 15519
Process 15519 attached - interrupt to quit
read(6, ^C <unfinished ...>
Process 15519 detached

After it's locked, it in this stage:

# strace -p 15519
Process 15519 attached - interrupt to quit
futex(0xaf0c8f10, FUTEX_WAIT, 2, NULL^C <unfinished ...>
Process 15519 detached


# gdb -p 15519
...
(gdb) bt
#0  0xb7732430 in __kernel_vsyscall ()
#1  0xb76826e7 in syscall () from /lib/tls/i686/cmov/libc.so.6
#2  0xaee41036 in futex_get (dsht=0xaf0c8b30) at
#../../mem/../futexlock.h:110
#3  ds_ht_clear_slots (dsht=0xaf0c8b30) at ds_ht.c:162
#4  0xaee38556 in ds_load_list (lfile=0xb71c2840
#"/usr/local/kamailio/etc/kamailio/dispatcher.list") at dispatch.c:601
#5  0xaee3c050 in ds_mi_reload (cmd_tree=0xa1dee18, param=0x0) at
#dispatcher.c:776
#6  0xb71a76f2 in run_mi_cmd (fifo_stream=0xa1ddad0) at
#../../lib/kmi/mi.h:77
#7  mi_fifo_server (fifo_stream=0xa1ddad0) at fifo_fnc.c:509
#8  0xb71a96b0 in fifo_process (rank=1) at mi_fifo.c:247
#9  0xb71a9a18 in mi_child_init (rank=0) at mi_fifo.c:211   
#10 0x08123c5f in init_mod_child (m=0xb71ba5d8, rank=0) at sr_module.c:893
#11 0x08123bd0 in init_mod_child (m=0xb71ba6f0, rank=0) at sr_module.c:890
#12 0x08123bd0 in init_mod_child (m=0xb71baac8, rank=0) at sr_module.c:890
#13 0x08123bd0 in init_mod_child (m=0xb71bb798, rank=0) at sr_module.c:890
#14 0x08123bd0 in init_mod_child (m=0xb71bbb48, rank=0) at sr_module.c:890
#15 0x08123bd0 in init_mod_child (m=0xb71bbd88, rank=0) at sr_module.c:890
#16 0x08123bd0 in init_mod_child (m=0xb71bc0e0, rank=0) at sr_module.c:890
#17 0x08123bd0 in init_mod_child (m=0xb71bdbc8, rank=0) at sr_module.c:890
#18 0x08123bd0 in init_mod_child (m=0xb71bdd68, rank=0) at sr_module.c:890
#19 0x08123bd0 in init_mod_child (m=0xb71bded0, rank=0) at sr_module.c:890
#20 0x08123bd0 in init_mod_child (m=0xb71be1e8, rank=0) at sr_module.c:890
#21 0x08123bd0 in init_mod_child (m=0xb71be828, rank=0) at sr_module.c:890
#22 0x08123bd0 in init_mod_child (m=0xb71bec88, rank=0) at sr_module.c:890
#23 0x08123bd0 in init_mod_child (m=0xb71bef48, rank=0) at sr_module.c:890
#24 0x08123bd0 in init_mod_child (m=0xb71bf0c8, rank=0) at sr_module.c:890
#25 0x08123bd0 in init_mod_child (m=0xb71bf378, rank=0) at sr_module.c:890
#26 0x08123bd0 in init_mod_child (m=0xb71bffb0, rank=0) at sr_module.c:890
#27 0x08123bd0 in init_mod_child (m=0xb71c0220, rank=0) at sr_module.c:890
#28 0x08123bd0 in init_mod_child (m=0xb71c1ac0, rank=0) at sr_module.c:890
#29 0x08123bd0 in init_mod_child (m=0xb71c1c28, rank=0) at sr_module.c:890
#30 0x08123bd0 in init_mod_child (m=0xb71c2218, rank=0) at sr_module.c:890
#31 0x08123bd0 in init_mod_child (m=0xb71c24d0, rank=0) at sr_module.c:890
#32 0x08123bd0 in init_mod_child (m=0xb71c38c8, rank=0) at sr_module.c:890
#33 0x080a8ccd in main_loop () at main.c:1710
#34 0x080ab337 in main (argc=13, argv=0xbfc04964) at main.c:2546
(gdb) quit


More information can be found at the following URL:
http://sip-router.org/tracker/index.php?do=details&task_id=275

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