[SR-Users] kamailio slow/no response for requests on particular ports

[Karthik Srinivasan]

Hi Daniel,

Thanks for the response.

We are not using the pike module.

The requests to a port are not dismissed;  rather, in most cases, there is
a delay in response from kamailio.   Also, the delay is not restricted to
any particular message request.  it happens for any type of request.
(register; subscribe; etc...).

But those same requests, if pointed to different port, have no issues.

Also, to note, I am not restarting kamailio when the issue occurs on a
particular port.  kamailio is kept running and pointing traffic to a
non-problematic port seems fine.

Karthik

On Mon, May 11, 2015 at 12:41 PM, Daniel-Constantin Mierla <
miconda at gmail.com> wrote:

>  Hello,
>
> do you have pike module loaded and enabled?
>
> Are all requests to a port dismissed or just some of them?
>
> Cheers,
> Daniel
>
> On 11/05/15 19:20, Karthik Srinivasan wrote:
>
>  Hi,
>
>  I have encountered an issue with kamailio and am hoping someone on this
> email distro can help:
>
>  Here's my setup and description of the issue:
>
>  I am running kamailio version 3.1.4.
>
>  I have the kamailio process bound to ports 5060, 5070, and 5090.  all
> UDP.
>
>  I have several client devices registering to the kamailio registrar.
>
>  The issue I have encountered is this:
>
>  SIP registrations to port 5070 are fine for a period of time;  by fine I
> mean clients send SIP registration requests to kamailio; and kamailio
> responds promptly to the request.   by period of time I mean (this could be
> somewhat random) that for10 hours;  12 hours;  1 hour; that kamailo has no
> issue processing requests.  after this random time period has elapsed,
> kamailo isn't able to respond to sip registrations and other messages in
> timely manner;   to the point where the clients timeout and have to resend
> their registration requests.  at times, kamailio does respond to the
> requests (with a significant delay) and at other times no response is
> received by the client.  the user experience is intermittent registration
> delays/failures.
>
>  The same behavior is seen on port 5090.
>
>  I have not encountered the issue yet on port 5060.
>
>  During times when kamailio isn't able to respond timely to requests on a
> particular port,  requests to other ports are responded to timely.
>
>  for ex:   if port 5070 encounters the issue;  port 5060 and 5090 seem
> fine.  meaning, I can point my client devices to 5060 or  5090 and kamailio
> processes the requests timely.
>
>  I have studied a tcp dump on the server end (kamailio side) and noticed
> that the network layer shows the messages from the client to be received
> timely while kamailio is encountering this issue.   which indicates to me
> that it probably isn't a network lag related issue.
>
>  Something at the application layer is probably causing kamailio to not
> respond timely.
>
>  Furthermore the issue resolves itself after a period of time;  that is,
> kamailio begins to respond to messages timely on the problematic port.
> I haven't had a chance yet to determine exactly how long it takes to
> recover.  it certainly takes some time though.  at least 30 minutes; maybe
> more.
>
>  I can also state that the load on the kamailio system is minimal.  far
> below than what the performance metrics state it can handle.
>
>  Has anyone encountered this issue where kamalio isn't responding to
> registration and other requests timely on a particular port but does so
> fine for other ports?
>
>  Any help on this would be appreciated.
>
>  Thanks,
>
>  Karthik
>
>
>
>
>
>
>
> _______________________________________________
> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing listsr-users at lists.sip-router.orghttp://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>
>
> --
> Daniel-Constantin Mierlahttp://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
> Kamailio World Conference, May 27-29, 2015
> Berlin, Germany - http://www.kamailioworld.com
>
>
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