[OpenSIPS-Users] TCP Errors

Bogdan-Andrei Iancu bogdan at opensips.org
Wed Jun 25 11:54:04 CEST 2014


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
     - try to understand the SIP patterns where such TCP connect fails 
so you can avoid them at script level.


Bogdan-Andrei Iancu
OpenSIPS Founder and Developer

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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> Users at lists.opensips.org
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