[OpenSIPS-Users] TCP Errors

Liviu Chircu liviu at opensips.org
Tue Jul 1 14:05:12 CEST 2014


Hello Gary,

That "error" is most likely due to out-of-dialog ACKs to 487 responses 
(CANCEL scenarios). Thank you for reporting - it should actually be a 
debugging message.

Best regards,

Liviu Chircu
OpenSIPS Developer
http://www.opensips-solutions.com

On 06/30/2014 07:00 PM, Gary Nyquist wrote:
> Hi Vlad,
> Thanks for taking up this issue.
> 1.  Yes. tcp_async=1
> 2.  Running on CentOS ( 2.6.32-358.6.2.el6.x86_64 )
> 3.  It's occurring on every INVITE
> May be unrelated to this bug; but I am also seeing error messages like:
> ERROR:script_helper:run_helper_logic: failed to match dialog, ci 
> '4E14BD6E-53B17A8F00026071-6B1EA700'
> Thanks again...
> BR
> -Gary
> *Sent:* Monday, June 30, 2014 at 5:06 AM
> *From:* "Vlad Paiu" <vladpaiu at opensips.org>
> *To:* users at lists.opensips.org
> *Cc:* gn62 at gmx.us
> *Subject:* Re: [OpenSIPS-Users] TCP Errors
> Hello,
>
> First of all, are you using the async_tcp option in your OpenSIPS script ?
> Also, what architecture / OS are you running on ?
> What steps are you taking in reproducing this ?
>
> Best Regards,
> Vlad Paiu
> OpenSIPS Developer
> http://www.opensips-solutions.com  
> On 27.06.2014 19:59, Gary Nyquist wrote:
>
>     Thanks Bogdan for looking into it.
>     Here is the version:
>     opensips -V
>     version: opensips 1.11.1-tls (x86_64/linux)
>     flags: STATS: On, USE_TCP, USE_TLS, DISABLE_NAGLE, SHM_MEM,
>     SHM_MMAP, PKG_MALLOC, F_MALLOC, USE_SHM_MEM, FAST_LOCK-ADAPTIVE_WAIT
>     ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN
>     16, MAX_URI_SIZE 1024, BUF_SIZE 65535
>     poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
>     git revision: dbc8653
>     main.c compiled on 16:17:43 Jun 26 2014 with gcc 4.4.7
>     Yes, this bug is reproducable.
>     When it appears, the log file instantly gets filled with hundreds
>     of repeating lines like this:
>     Jun 26 20:30:31 ip-10-0-0-30 /usr/sbin/opensips[15229]:
>     DBG:core:handle_tcpconn_ev: data available on 0x7f40bcec7398 6
>     Jun 26 20:30:31 ip-10-0-0-30 /usr/sbin/opensips[15229]:
>     DBG:core:io_watch_del: io_watch_del op on index -1 6 (0x7dff20, 6,
>     -1, 0x0,0x1) fd_no=110 called
>     Jun 26 20:30:31 ip-10-0-0-30 /usr/sbin/opensips[15229]:
>     ERROR:core:io_watch_del: BUG - trying to del fd 6 with flags 2 1
>     Jun 26 20:30:31 ip-10-0-0-30 /usr/sbin/opensips[15229]:
>     DBG:core:handle_tcpconn_ev: data available on 0x7f40bcec7398 6
>     Jun 26 20:30:31 ip-10-0-0-30 /usr/sbin/opensips[15229]:
>     DBG:core:io_watch_del: io_watch_del op on index -1 6 (0x7dff20, 6,
>     -1, 0x0,0x1) fd_no=110 called
>     Jun 26 20:30:31 ip-10-0-0-30 /usr/sbin/opensips[15229]:
>     ERROR:core:io_watch_del: BUG - trying to del fd 6 with flags 2 1
>     Thanks again for your help.
>     BR
>     -Gary
>     *Sent:* Thursday, June 26, 2014 at 10:56 AM
>     *From:* "Bogdan-Andrei Iancu" <bogdan at opensips.org>
>     *To:* "Gary Nyquist" <gn62 at gmx.us>
>     *Cc:* "OpenSIPS users mailling list" <users at lists.opensips.org>
>     *Subject:* Re: [OpenSIPS-Users] TCP Errors
>     Hi,
>
>     That bug log actually says OpenSIPS tries to remove a connection
>     marked as READ from a list for WRITEs :)..
>
>     I will look into that. What exact version do you use (opensips -V)
>     ? also, can you reproduce this  bug ?
>
>     Thanks and regards,
>
>     Bogdan-Andrei Iancu
>     OpenSIPS Founder and Developer
>     http://www.opensips-solutions.com
>
>     On 25.06.2014 20:27, Gary Nyquist wrote:
>
>         Thanks Bogdan for the detailed reply.
>         I implemented your advice.
>         Those error messages are now gone.
>         But seeing a new error now; not sure if it is related to that...
>         ERROR:core:io_watch_del: BUG - trying to del fd 36 with flags 2 1
>         Any advice?
>         BR
>         -Gary
>         *Sent:* Wednesday, June 25, 2014 at 5:54 AM
>         *From:* "Bogdan-Andrei Iancu" <bogdan at opensips.org>
>         *To:* "OpenSIPS users mailling list"
>         <users at lists.opensips.org>, gn62 at gmx.us
>         *Subject:* Re: [OpenSIPS-Users] TCP Errors
>         Hi,
>
>         Those messages say that OpenSIPS tried to open a TCP
>         connection to a party which does not respond -> there was a
>         timeout for connect in 10 seconds. Because of this blocking in
>         connects, there were not more opensips workers available to
>         handle other traffic.
>
>         So what you need to do is :
>             - minimize the impact of the blocking connect - see my
>         previous email on reducing the connect timeout
>             - you may configure OpenSIPS not to open new TCP connect
>         (but to reuse the existing ones, open by clients). See
>         tcp_no_new_conn_bflag
>         http://www.opensips.org/Documentation/Script-CoreParameters-1-11#toc96
>             - try to understand the SIP patterns where such TCP
>         connect fails so you can avoid them at script level.
>
>         Regards,
>
>         Bogdan-Andrei Iancu
>         OpenSIPS Founder and Developer
>         http://www.opensips-solutions.com
>
>         On 24.06.2014 21:34, Gary Nyquist wrote:
>
>             Hi,
>
>             The following lines are repeating in the log.
>
>             ERROR:core:tcp_blocking_connect: timeout 10 s elapsed from
>             10 s
>             ERROR:core:tcpconn_connect: tcp_blocking_connect failed
>             ERROR:core:tcp_send: connect failed
>             ERROR:tm:msg_send: tcp_send failed
>
>             INFO:core:send2child: no free tcp receiver, connection
>             passed to the least busy one
>
>             Any guess, what could be the reason?
>
>             Best
>
>             --Gary
>
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