[Kamailio-Users] tcp_blocking_connect related errors and Kamailio using 100% CPU

[Pascal Maugeri]

Hi

Using Kamailio 1.5 we periodically get the following errors:

Jul  1 09:54:41 localhost /usr/local/sbin/openser[3836]:
ERROR:core:tcp_blocking_connect: poll error: flags 18
Jul  1 09:54:41 localhost /usr/local/sbin/openser[3836]:
ERROR:core:tcp_blocking_connect: failed to retrieve SO_ERROR (110)
Connection timed out
Jul  1 09:54:41 localhost /usr/local/sbin/openser[3836]:
ERROR:core:tcpconn_connect: tcp_blocking_connect failed
Jul  1 09:54:41 localhost /usr/local/sbin/openser[3836]:
ERROR:core:tcp_send: connect failed
Jul  1 09:54:41 localhost /usr/local/sbin/openser[3836]: ERROR:tm:msg_send:
tcp_send failed

They are several emails in this mailing list explaining we should play with
tcp parameters. I will try to change my configuration and see if we can
solve this issue.

But when this kind of error happen we observe that the kamailio processes
are using 100% of CPU (top).

Our client is using SIP over TCP only (no UDP).

Do you have any hint on how to configure Kamailio to improve TCP support ?
Is it normal to kamailio processes to overload CPU ?

Regards,
Pascal
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