Hi,

Just to add that in my case I had a problem when after some period of time with a lot of TLS clients(100k+) I got a lot of TCP connections in CLOSE_WAIT state. When connections in CLOSE_WAIT state hit more then 1k, then kamailio stopped to receive traffic via TLS, nevertheless UDP at same time worked fine. From my point of view it looked like there was issue somewhere on Linux side, cause Kamailio never got anything... At least this is what I remember... I still plan to work on it someday. :) And if I will find out, I'll let you know.

Jurijs


On Wed, Feb 27, 2019 at 1:13 PM Kristijan Vrban <vrban.lkml@gmail.com> wrote:
when is strace to the kamailio process that is attached to the tcp
port. it get sporadic this:

[], 46, 5000)            = 0
epoll_wait(17, [{EPOLLIN, {u32=2692971064, u64=139924137540152}}], 46, 5000) = 1
accept(14, {sa_family=AF_INET, sin_port=htons(59766),
sin_addr=inet_addr("xxx.xx.xxx.xxx")}, [28->16]) = 275
fcntl(275, F_GETFL)                     = 0x2 (flags O_RDWR)
fcntl(275, F_SETFL, O_RDWR|O_NONBLOCK)  = 0
epoll_ctl(17, EPOLL_CTL_ADD, 275, {EPOLLIN|EPOLLRDHUP,
{u32=2692977328, u64=139924137546416}}) = 0
epoll_wait(17, [{EPOLLIN, {u32=2692977328, u64=139924137546416}}], 47, 5000) = 1
epoll_ctl(17, EPOLL_CTL_DEL, 275, 0x7ffdae44ee4c) = 0
recvmsg(53, {msg_namelen=0}, MSG_DONTWAIT) = -1 EAGAIN (Resource
temporarily unavailable)
recvfrom(56, 0x7ffdae44ed90, 16, MSG_DONTWAIT, NULL, NULL) = -1 EAGAIN
(Resource temporarily unavailable)
sendmsg(56, {msg_name=NULL, msg_namelen=0,
msg_iov=[{iov_base="\210ku\230B\177\0\0", iov_len=8}], msg_iovlen=1,
msg_control=[{cmsg_len=20, cmsg_level=SOL_SOCKET,
cmsg_type=SCM_RIGHTS, cmsg_data=[275]}], msg_controllen=20,
msg_flags=0}, 0) = 8
epoll_wait(17,

But that's all, no further processing by kamailio.

Am Mi., 27. Feb. 2019 um 11:53 Uhr schrieb Kristijan Vrban
<vrban.lkml@gmail.com>:
>
> Hi kamailios,
>
> i have a creepy situation with v5.2.1 stable Kamilio. After a day or
> so, Kamailio stop to process incoming SIP traffic via TCP. The
> incoming TCP network packages get TCP-ACK from the OS (Debian 9,
> 4.18.0-15-generic-Linux) but Kamailio does not show any processing for
> the SIP-Traffic incoming via TCP. No logs, nothing. While traffic via
> UDP is working just totally fine.
>
> When i look via command "netstat -ntp" is see, that the Recv-Q get
> bigger and bigger. e.g.:
>
> Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program
> name tcp 4566 0 172.17.217.12:5060 xxx.xxx.xxx.xxx:57252 ESTABLISHED
> 31347/kamailio
>
> After Kamailio restart, all is working fine again for a day. We have
> maybe 10-20 devices online via TCP and low call volume (1-2 call per
> minute). The only settings for tcp we have is "tcp_delayed_ack=no"
>
> How to could we debug this situation? Again, no error, no warings in
> the log. Just nothing.
>
> Kristijan

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