[OpenSIPS-Users] first async(rest_post) timeout fail

[Liviu Chircu]

Hello koce!

Most likely, the issue is due to your restricting "connection_timeout = 
1" module parameter. To quote from libcurl's documentation [1]: /"You 
must not wait too long (more than a few seconds perhaps)". /This is why 
I chose that 500 ms pause time upon running into that error condition, 
which is basically 50% of your allowed blocking time already!

To better understand how much libcurl expects you to wait, you can apply 
an extra logging patch:

/git apply <(wget -qO - 
http://opensips.org/patches/rest_client_connect_timeout_logging.patch)

/Please re-compile your rest_client and re-run the test, and we'll draw 
final conclusions afterwards!

[1]: https://curl.haxx.se/libcurl/c/curl_multi_timeout.html

Best regards,

Liviu Chircu
OpenSIPS Developer
http://www.opensips-solutions.com

On 23.02.2016 15:46, koce at mentalchallenge.tk wrote:
> Hello I'm using OpenSIPS 2.1 latest from git and every time I call the 
> first async(rest_post) function from my script I experience 
> timeout,and the other calls to async(rest_post) after that point in 
> the script are OK, as if the first call is like a ping to the http 
> server it does not send any data to it,it only completes the TCP 
> handshake.
>  But if I put a dummy rest_post() function in front of the first 
> async(rest_post) it will send the data that is assigned to it and 
> after that the first async(rest_post) call and the rest that follow 
> will execute as planned.
> To test if there is something wrong with the server that I'm 
> connecting to I tried another server that had nothing to do with the 
> original just to see if I get the same result and YES the 
> async(rest_post) to that server failed but the other async(rest_post) 
> who are interacting with the original server executed without a hitch.
> Also I think it's related to this 
> https://github.com/OpenSIPS/opensips/issues/493 which is closed.
> Could this be a possible bug,or am I missing something obvious ?
> Also I installed curl 7.47.1 just to make sure it wasn't libcurl in 
> question and the same scenario happened again.
> the errors that I got in opensips.log
> ====================
> Feb 23 10:49:43 /sbin/opensips[25985]: 
> INFO:rest_client:start_async_http_req: curl_multi_timeout() returned 
> -1, pausing 500ms...
> Feb 23 10:49:44 /sbin/opensips[25985]: 
> ERROR:rest_client:start_async_http_req: timeout while connecting to 
> 'http://192.168.100.3:2080/jsonrpc' (1 sec)
> ====================
> Feb 23 12:28:08 /sbin/opensips[26219]: 
> INFO:rest_client:start_async_http_req: curl_multi_timeout() returned 
> -1, pausing 500ms...
> Feb 23 12:28:08 /sbin/opensips[26219]: 
> ERROR:rest_client:start_async_http_req: timeout while connecting to 
> 'http://192.168.100.2:80/jsonrpc' (1 sec)
> ====================
> NOTE: the IP's are substituted from the real ones which are public.
> I'm attaching 2 flows from wireshark.
>
>
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