Problem with blocking connect().

Hi, list.
I have problem with kannel 1.2.0.
In production enviroment I forced to use kannel 0.12.3.
If I use 1.2.0 under heavy load (realy not so 'heavy', it's about 1-2
request per second) then kannel periodically hangs up for some time.
After some investigation it seems I find where is the problem.
I think it is in http_start_request -> write_request -> conn_open_tcp.

There is remark at begining of conn.c :
TODO: have conn_open_tcp do a non-blocking connect().

So in my case connect blocks fairly often and kannel is
unusable.

Here the wapbox.log snapshot:

(added debug points in socket.c)
2002-10-21 09:46:14 [10] DEBUG: service=80
2002-10-21 09:46:14 [10] DEBUG: our service=0
2002-10-21 09:46:14 [10] DEBUG: hostname=wap.hotelguide.com
2002-10-21 09:46:14 [10] DEBUG: interface name=(null)
2002-10-21 09:46:14 [10] DEBUG: try to connect

In case of immediate return from connect here must be somethink like this:
2002-10-21 09:46:13 [10] DEBUG: HTTP: Sending request:
and request dumping but thread [10] hangs on this point


2002-10-21 09:46:14 [1] DEBUG: WSP: machine 0x8137688, state CONNECTED, event 
S-MethodResu
lt.req
2002-10-21 09:46:14 [1] DEBUG: WSP: method 105, state PROCESSING, event 
S-MethodResult.req
2002-10-21 09:46:14 [1] DEBUG: WSP 2/105: New method state REPLYING
2002-10-21 09:46:14 [1] DEBUG: WSP 2: New state CONNECTED
2002-10-21 09:46:14 [5] DEBUG: WTP: resp_machine 105, state RESULT_WAIT, event 
TR-Result.req.
2002-10-21 09:46:14 [5] DEBUG: WTP 105: New state RESULT_RESP_WAIT
2002-10-21 09:46:14 [5] DEBUG: WTP: Created WTPRespMachine 0x81658a0 (106)
2002-10-21 09:46:14 [5] DEBUG: WTP: resp_machine 106, state LISTEN, event RcvInvoke.
2002-10-21 09:46:14 [5] DEBUG: WTP 106: New state INVOKE_RESP_WAIT
2002-10-21 09:46:14 [1] DEBUG: WSP: machine 0x813efa8, state CONNECTED, event 
TR-Invoke.ind
2002-10-21 09:46:14 [1] DEBUG: WSP: method 106, state NULL_METHOD, event 
TR-Invoke.ind
2002-10-21 09:46:14 [1] DEBUG: WSP 6/106: New method state HOLDING
2002-10-21 09:46:14 [1] DEBUG: WSP: method 106, state HOLDING, event Release
2002-10-21 09:46:14 [1] DEBUG: WSP 6/106: New method state REQUESTING
2002-10-21 09:46:14 [1] DEBUG: WSP 6: New state CONNECTED
2002-10-21 09:46:14 [1] DEBUG: WSP: machine 0x813efa8, state CONNECTED, event 
S-MethodInvoke.res
2002-10-21 09:46:14 [1] DEBUG: WSP: method 106, state REQUESTING, event 
S-MethodInvoke.res
2002-10-21 09:46:14 [1] DEBUG: WSP 6/106: New method state PROCESSING
2002-10-21 09:46:14 [1] DEBUG: WSP 6: New state CONNECTED
2002-10-21 09:46:14 [5] DEBUG: WTP: resp_machine 106, state INVOKE_RESP_WAIT, 
event TR-Invoke.res.
2002-10-21 09:46:14 [5] DEBUG: WTP 106: New state RESULT_WAIT
2002-10-21 09:46:16 [5] DEBUG: WTP: resp_machine 105, state RESULT_RESP_WAIT, 
event RcvAck.
2002-10-21 09:46:16 [5] DEBUG: WTP 105: New state LISTEN
2002-10-21 09:46:16 [5] DEBUG: WTP: Destroying WTPRespMachine 0x8165f78 (105)
2002-10-21 09:46:16 [1] DEBUG: WSP: machine 0x8137688, state CONNECTED, event 
TR-Result.cnf
2002-10-21 09:46:16 [1] DEBUG: WSP: method 105, state REPLYING, event TR-Result.cnf
2002-10-21 09:46:16 [1] DEBUG: WSP 2/105: New method state NULL_METHOD
2002-10-21 09:46:16 [1] DEBUG: Destroying WSPMethodMachine 105
2002-10-21 09:46:16 [1] DEBUG: WSP 2: New state CONNECTED
2002-10-21 09:46:18 [5] DEBUG: WTP: Created WTPRespMachine 0x8157648 (107)
2002-10-21 09:46:18 [5] DEBUG: WTP: resp_machine 107, state LISTEN, event RcvInvoke.
2002-10-21 09:46:18 [5] DEBUG: WTP 107: New state INVOKE_RESP_WAIT
2002-10-21 09:46:18 [1] DEBUG: WSP: machine 0x8136530, state CONNECTED, event 
TR-Invoke.ind
2002-10-21 09:46:18 [1] DEBUG: WSP: method 107, state NULL_METHOD, event 
TR-Invoke.ind
2002-10-21 09:46:18 [1] DEBUG: WSP 12/107: New method state HOLDING
2002-10-21 09:46:18 [1] DEBUG: WSP: method 107, state HOLDING, event Release
2002-10-21 09:46:18 [1] DEBUG: WSP 12/107: New method state REQUESTING
2002-10-21 09:46:18 [1] DEBUG: WSP 12: New state CONNECTED
2002-10-21 09:46:18 [1] DEBUG: WSP: machine 0x8136530, state CONNECTED, event 
S-MethodInvoke.res
2002-10-21 09:46:18 [1] DEBUG: WSP: method 107, state REQUESTING, event 
S-MethodInvoke.res
2002-10-21 09:46:18 [1] DEBUG: WSP 12/107: New method state PROCESSING
2002-10-21 09:46:18 [1] DEBUG: WSP 12: New state CONNECTED
2002-10-21 09:46:18 [5] DEBUG: WTP: resp_machine 107, state INVOKE_RESP_WAIT, 
event TR-Invoke.res.
2002-10-21 09:46:18 [5] DEBUG: WTP 107: New state RESULT_WAIT
2002-10-21 09:46:18 [4] DEBUG: Timeout-A elapsed.
2002-10-21 09:46:18 [5] DEBUG: WTP: resp_machine 106, state RESULT_WAIT, event 
Timeout-A.
2002-10-21 09:46:18 [5] DEBUG: WTP 106: New state RESULT_WAIT
2002-10-21 09:46:19 [5] DEBUG: WTP: Created WTPRespMachine 0x815fb50 (108)
2002-10-21 09:46:19 [5] DEBUG: WTP: resp_machine 108, state LISTEN, event RcvInvoke.
2002-10-21 09:46:19 [5] DEBUG: WTP 108: New state INVOKE_RESP_WAIT


-- 
Vjacheslav Chekushin                                mailto:[email protected]
Latvian Mobile Phone Company                        http://www.lmt.lv