[sr-dev] SR master: [tcp_main.c:700]: _wbufq_add(): ERROR: wbufq_add(371 bytes): write queue full or timeout

Iñaki Baz Castillo ibc at aliax.net
Fri Dec 10 13:39:18 CET 2010


Hi, I'm testing TCP support in Kamailio master branch.

The test is a bit special because I open a TCP connection (client and
proxy in localhost) and send a TCP data containing 5000 SIP requests
together (which is valid). Then wait for responses and parses them.
Kamailio just replies stateless for all those requests (no routing, no
forwarding, no more processing). There are two TCP workers.

Sometimes it works ok and all the replies are received, but sometimes
Kamailio gives an error after receiving N requests (i.e. 1072
requests):


kamailio[18349]: INFO: <script>: Branch = z9hG4bK1---num-request-1071#015#012
kamailio[18349]: ERROR: <core> [tcp_main.c:700]: _wbufq_add(): ERROR:
wbufq_add(372 bytes): write queue full or timeout  (32455, total
32455, last write 0 s ago)
kamailio[18349]: ERROR: sl [../../forward.h:169]: msg_send():
msg_send: ERROR: tcp_send failed
kamailio[18349]: INFO: <script>: Branch = z9hG4bK1---num-request-1072#015#012
kamailio[18350]: ERROR: <core> [tcp_main.c:3594]: handle_ser_child():
handle_ser_child: ERROR: received CON_ERROR for 0x7fc0dd172880 (id
65), refcnt 3, flags 0x601c
kamailio[18349]: ERROR: <core> [tcp_main.c:2743]: tcpconn_1st_send():
connect 127.0.0.1:51901 failed (RST) Connection refused
kamailio[18349]: ERROR: <core> [tcp_main.c:2753]: tcpconn_1st_send():
127.0.0.1:51901: connect & send  for 0x7fc0dd17c648 failed: Connection
refused (111)
kamailio[18349]: ERROR: sl [../../forward.h:169]: msg_send():
msg_send: ERROR: tcp_send failed
kamailio[18349]: INFO: <script>: Branch = z9hG4bK1---num-request-1073#015#012
kamailio[18349]: ERROR: <core> [tcp_main.c:2743]: tcpconn_1st_send():
connect 127.0.0.1:51901 failed (RST) Connection refused
kamailio[18349]: ERROR: <core> [tcp_main.c:2753]: tcpconn_1st_send():
127.0.0.1:51901: connect & send  for 0x7fc0dd17c648 failed: Connection
refused (111)
kamailio[18349]: ERROR: sl [../../forward.h:169]: msg_send():
msg_send: ERROR: tcp_send failed
kamailio[18349]: INFO: <script>: Branch = z9hG4bK1---num-request-1074#015#012
kamailio[18349]: ERROR: <core> [tcp_main.c:2743]: tcpconn_1st_send():
connect 127.0.0.1:51901 failed (RST) Connection refused
kamailio[18349]: ERROR: <core> [tcp_main.c:2753]: tcpconn_1st_send():
127.0.0.1:51901: connect & send  for 0x7fc0dd17c648 failed: Connection
refused (111)
kamailio[18349]: ERROR: sl [../../forward.h:169]: msg_send():
msg_send: ERROR: tcp_send failed
kamailio[18349]: INFO: <script>: Branch = z9hG4bK1---num-request-1075#015#012
kamailio[18349]: ERROR: <core> [tcp_main.c:2743]: tcpconn_1st_send():
connect 127.0.0.1:51901 failed (RST) Connection refused
kamailio[18349]: ERROR: <core> [tcp_main.c:2753]: tcpconn_1st_send():
127.0.0.1:51901: connect & send  for 0x7fc0dd17c648 failed: Connection
refused (111)
kamailio[18349]: ERROR: sl [../../forward.h:169]: msg_send():
msg_send: ERROR: tcp_send failed
kamailio[18349]: INFO: <script>: Branch = z9hG4bK1---num-request-1076#015#012
kamailio[18349]: ERROR: <core> [tcp_main.c:2743]: tcpconn_1st_send():
connect 127.0.0.1:51901 failed (RST) Connection refused
kamailio[18349]: ERROR: <core> [tcp_main.c:2753]: tcpconn_1st_send():
127.0.0.1:51901: connect & send  for 0x7fc0dd17c648 failed: Connection
refused (111)
kamailio[18349]: ERROR: sl [../../forward.h:169]: msg_send():
msg_send: ERROR: tcp_send failed
kamailio[18349]: INFO: <script>: Branch = z9hG4bK1---num-request-1077#015#012
kamailio[18349]: ERROR: <core> [tcp_main.c:2743]: tcpconn_1st_send():
connect 127.0.0.1:51901 failed (RST) Connection refused
kamailio[18349]: ERROR: <core> [tcp_main.c:2753]: tcpconn_1st_send():
127.0.0.1:51901: connect & send  for 0x7fc0dd17c648 failed: Connection
refused (111)
kamailio[18349]: ERROR: sl [../../forward.h:169]: msg_send():
msg_send: ERROR: tcp_send failed


And finally Kamailio closes the TCP connection:

kamailio[18349]: WARNING: <core> [tcp_read.c:1195]: handle_io():
WARNING: tcp_receive: handle_io: F_TCPCONN connection marked as bad:
0x7fc0dd172880 id 65 refcnt 1



I've no special parameters for TCP in the kamailio.cfg, just the
default config file.
Is it a bug? can it be improved by setting some parameter? However
it's strange the fact that the error just occurs sometimes (but very
often).


Thanks.


-- 
Iñaki Baz Castillo
<ibc at aliax.net>



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