Hello,

do you have ctl module loaded? If yes, you can connect with sercmd and get the pid of the fifo listener:

sercmd> ps

Then connect with gdb:

gdb /path/to/kamailio pidoffifolistener

and get the backtrace.

That should show what the fifo process is doing.

Also, you can get the pid of fifo process at startup, with kamctl ps, store it for the time when it blocks in order to use it with gdb.

I haven't encountered this issue, do you have lot of communication over fifo file? How many commands and how often are sent through fifo file?

Cheers,
Daniel


On 1/18/11 11:52 AM, Anton Roman wrote:
Hi,

my reply is inline

2011/1/18 Daniel-Constantin Mierla <miconda@gmail.com>
Hello,

do you get anything in kamailio log messages when the fifo is not responding?
 
No, I didn't find anything regarding the fifo command in the logs.

What version of kamailio do you have?
 
kamailio-3.0.2, the last time we updated the code was on August 1st, since then it is in production.

Removing and creating a new one will not help, since kamailio will not reopen, so practically will still use the old file descriptor.
 
It makes all the sense. 

Cheers,
Daniel

Thank you very much,
regards,
Anton

On 1/18/11 10:54 AM, Anton Roman wrote:
Hi all,

I'm having trouble trying to execute fifo commands with "kamctl fifo <command>". Just after restarting Kamailio it works fine, however, sometimes after some days running it doesn't respond.

kamailio1:~# kamctl fifo which

It doesn't respond so I input Crtl+c and I get:
/usr/local/lib/kamailio//kamctl/kamctl.fifo: line 89: /tmp/kamailio_fifo: Interrupted system call

If I delete and create the fifo file again (with "rm /tmp/kamailio_fifo" and "mkfifo /tmp/kamailio_fifo" and "chmod 660 /tmp/kamailio_fifo") it keeps not responding.

Any help is welcome, what can be happening? Below you can find info about the pipe and the running kamailio.

Thanks in advance,
Best regards

Antón

 

kamailio1:~# ls -hall /tmp/kamailio_fifo
prw-rw---- 1 root root 0 ene 17 12:01 /tmp/kamailio_fifo

After deleting and creating the fifo file again:

kamailio1:~# ls -hall /tmp/kamailio_fifo
prw-rw-r-- 1 root root 0 ene 18 10:28 /tmp/kamailio_fifo

kamailio1:~# ps -ef | grep kama
root     17369 17245  0 10:12 pts/0    00:00:00 grep kama
kamailio 23277     1  0 Jan15 ?        00:00:00 /usr/local/sbin/kamailio -P /var/run/kamailio/kamailio.pid -m 512 -u kamailio -g kamailio
kamailio 23289 23277  0 Jan15 ?        00:00:00 /usr/local/sbin/kamailio -P /var/run/kamailio/kamailio.pid -m 512 -u kamailio -g kamailio
kamailio 23291 23277  0 Jan15 ?        00:00:00 /usr/local/sbin/kamailio -P /var/run/kamailio/kamailio.pid -m 512 -u kamailio -g kamailio
kamailio 23293 23277  0 Jan15 ?        00:00:00 /usr/local/sbin/kamailio -P /var/run/kamailio/kamailio.pid -m 512 -u kamailio -g kamailio
kamailio 23294 23277  0 Jan15 ?        00:00:00 /usr/local/sbin/kamailio -P /var/run/kamailio/kamailio.pid -m 512 -u kamailio -g kamailio
kamailio 23295 23277  0 Jan15 ?        00:01:14 /usr/local/sbin/kamailio -P /var/run/kamailio/kamailio.pid -m 512 -u kamailio -g kamailio
kamailio 23299 23277  0 Jan15 ?        00:01:13 /usr/local/sbin/kamailio -P /var/run/kamailio/kamailio.pid -m 512 -u kamailio -g kamailio
kamailio 23300 23277  0 Jan15 ?        00:01:13 /usr/local/sbin/kamailio -P /var/run/kamailio/kamailio.pid -m 512 -u kamailio -g kamailio
kamailio 23303 23277  0 Jan15 ?        00:01:13 /usr/local/sbin/kamailio -P /var/run/kamailio/kamailio.pid -m 512 -u kamailio -g kamailio
kamailio 23305 23277  0 Jan15 ?        00:05:29 /usr/local/sbin/kamailio -P /var/run/kamailio/kamailio.pid -m 512 -u kamailio -g kamailio
kamailio 23306 23277  0 Jan15 ?        00:05:33 /usr/local/sbin/kamailio -P /var/run/kamailio/kamailio.pid -m 512 -u kamailio -g kamailio
kamailio 23309 23277  0 Jan15 ?        00:05:30 /usr/local/sbin/kamailio -P /var/run/kamailio/kamailio.pid -m 512 -u kamailio -g kamailio
kamailio 23311 23277  0 Jan15 ?        00:05:31 /usr/local/sbin/kamailio -P /var/run/kamailio/kamailio.pid -m 512 -u kamailio -g kamailio
kamailio 23312 23277  0 Jan15 ?        00:00:02 /usr/local/sbin/kamailio -P /var/run/kamailio/kamailio.pid -m 512 -u kamailio -g kamailio
kamailio 23313 23277  0 Jan15 ?        00:00:39 /usr/local/sbin/kamailio -P /var/run/kamailio/kamailio.pid -m 512 -u kamailio -g kamailio
kamailio 23315 23277  0 Jan15 ?        00:00:00 /usr/local/sbin/kamailio -P /var/run/kamailio/kamailio.pid -m 512 -u kamailio -g kamailio
kamailio 23320 23277  0 Jan15 ?        00:00:00 /usr/local/sbin/kamailio -P /var/run/kamailio/kamailio.pid -m 512 -u kamailio -g kamailio
kamailio 23321 23277  0 Jan15 ?        00:00:00 /usr/local/sbin/kamailio -P /var/run/kamailio/kamailio.pid -m 512 -u kamailio -g kamailio
kamailio 23322 23277  0 Jan15 ?        00:00:05 /usr/local/sbin/kamailio -P /var/run/kamailio/kamailio.pid -m 512 -u kamailio -g kamailio
kamailio 23323 23277  0 Jan15 ?        00:00:00 /usr/local/sbin/kamailio -P /var/run/kamailio/kamailio.pid -m 512 -u kamailio -g kamailio




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-- 
Daniel-Constantin Mierla
Kamailio (OpenSER) Advanced Training
Jan 24-26, 2011, Irvine, CA, USA
http://www.asipto.com


_______________________________________________
SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
sr-users@lists.sip-router.org
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-- 
Daniel-Constantin Mierla
Kamailio (OpenSER) Advanced Training
Jan 24-26, 2011, Irvine, CA, USA
http://www.asipto.com