[SR-Users] ERROR : EAGAIN and write queue full or failed for tcp Connection

[Henning Westerholt]

Am Dienstag, 5. Februar 2019, 06:31:02 CET schrieb YASIN CANER:
> I found the problem. it is about Kamailio-master. When i test on 5.2
> version, it can relay tcp sip request to other side. I think it is a bug
> for tcp connection.
> 
> Thanks.

Hi Yasin,

did I understood you correctly, you think there is a bug in kamailio git 
master related to TCP handling? Would be great if then you could open an issue 
with more details about it.

Best regards,

Henning


> UAC:IPv6:TCP ---> Kamailio (5.2):IPv6:TCP ---> Kamailio:IPv6:TCP (works)
> 
> ________________________________
> From: sr-users <sr-users-bounces at lists.kamailio.org> on behalf of YASIN
> CANER <caner_yaso at hotmail.com> Sent: Thursday, January 31, 2019 3:01 PM
> To: Kamailio (SER) - Users Mailing List
> Subject: [SR-Users] ERROR : EAGAIN and write queue full or failed for tcp
> Connection
> 
> Hello,
> 
> Kamailio gave this error that couldnt bind tcp connection other side.
> 
> Thanks
> 
> Yasin CANER
> 
> Kamailio IPv6:TCP: -----> IPv6:TCP Kamailio -----> X ERROR XXXX IPv6:TCP
> Kamailio IPv6::C                                IPv6::8                    
>                                     IPv6::5
> 
> LOGS:
> 
>  7(15781) DEBUG: <core> [core/msg_translator.c:2937]: create_via_hf(): id
> added: <;i=1>, rcv proto=2 7(15781) DEBUG: <core>
> [core/msg_translator.c:162]: check_via_address():
> (FD61:C23C:B3B6:0:0:0:0:C, [FD61:C23C:B3B6:0:0:0:0:C], 0) 7(15781) DEBUG:
> <core> [core/tcp_main.c:1977]: tcp_send(): no open tcp connection found,
> opening new one 7(15781) DEBUG: <core> [core/ip_addr.c:242]: print_ip():
> tcpconn_new: new tcp connection: fd61:c23c:b3b6:0:0:0:0:5
> 
>  7(15781) DEBUG: <core> [core/tcp_main.c:1229]: tcpconn_new(): on port 5060,
> type 2 7(15781) DEBUG: <core> [core/tcp_main.c:1539]: tcpconn_add():
> hashes: 507:2382:0, 2 7(15781) DEBUG: <core> [core/tcp_main.c:2873]:
> tcpconn_1st_send(): pending write on new connection 0x7fd15b5e7c98 (-1/1483
> bytes written) (err: 11 - Resource temporarily unavailable) 7(15781) ERROR:
> <core> [core/tcp_main.c:2891]: tcpconn_1st_send():
> [FD61:C23C:B3B6:0:0:0:0:5]:5060: EAGAIN and write queue full or failed for
> 0x7fd15b5e7c98 7(15781) DEBUG: <core> [core/tcp_main.c:3153]:
> tcpconn_chld_put(): destroying connection 0x7fd15b5e7c98 (2, -1) flags 0060
> 
>  7(15781) ERROR: tm [../../core/forward.h:251]: msg_send_buffer(): tcp_send
> failed 7(15781) DEBUG: tm [t_fwd.c:1549]: t_send_branch(): send to
> FD61:C23C:B3B6:0:0:0:0:5:5060 (2) failed 7(15781) WARNING: tm
> [t_fwd.c:1567]: t_send_branch(): sending request on branch 0 failed
> 
> 
> CONF:
> 
> dns_try_ipv6=yes
> dns_retr_time=1
> dns_retr_no=1
> dns_cache_flags=4
> tcp_source_ipv6 = [fd61:c23c:b3b6::8]
> 
> tcp_async=yes
> tcp_rd_buf_size=65536
> tcp_wq_blk_size=3000
> listen=tcp:[fd61:c23c:b3b6::8]:5060
> tcp_connection_lifetime=3605
> 
> listen=tcp:[fd61:c23c:b3b6::8]:5060
> .....
> 
> route[]{
> 
> 
> remove_hf("Route");
> #loose_route();
> 
> 
> if (!is_method("INVITE")) return;
> $du="sip: mykamailio1.test:5060;transport=tcp";
> 
> 
> if(!t_newtran()){
>  xlog("L_WARN"," Couldnt create new transaction \r\n");
>  sl_send_reply("503", "Service not available");
>  exit;
> }
> 
> if(!t_relay()){
>  send_reply("503", "Service not available");
>  exit;
> }
> exit;
> }


-- 
Henning Westerholt - https://skalatan.de/blog/
Kamailio services - https://skalatan.de/services
Kamailio security assessment - https://skalatan.de/de/assessment