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<p>Hello,</p>
<p>is the traffic sent over UDP?</p>
<p>Can you look with netstat and see if the receiving queue for the
socket of kamailio is buffering data?</p>
<p>What is the operating system? Do you have contrack (kernel
module) or selinux enabled in the system?</p>
<p>Verify also that you don't have pike module enabled with a low
rate limit.</p>
<p>Cheers,<br>
Daniel<br>
</p>
<div class="moz-cite-prefix">On 31.07.19 04:57, jay binks wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAO47HpdfX73OZPS=+dHjOvr9YJrwB9-MEusvYrFDZ7G3J8jHZg@mail.gmail.com">
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<div dir="ltr">Hey all,
<div>looking for a little help.</div>
<div><br>
</div>
<div>I've been tracking an issue, where a number of SIP Messages
( typically INVITE ) are sent, but Kamailio only see one of
them ( the last one). I have verified that the messages are
definitely received on the host, as verified with TCPDUMP, but
the INVITES never hit the request route block. ( the very
first thing is to log the message )
<div>
<div><br>
</div>
<div>What i've managed to find is, that if I increase worker
children, the problem goes away.</div>
<div><br>
</div>
<div>So I've got a problem, I think I've found the solution,
but what I'm struggling with is how to monitor better, so
I can be alerted to this in the future.</div>
<div><br>
</div>
<div>I started by looking at "kamctl stats | grep drop"</div>
"core:drop_replies = 14",<br>
"core:drop_requests = 10577"</div>
<div><br>
</div>
<div>however drop_requests seems to include explicit drops in
my config.</div>
<div>which I do for many reasons, but mainly bad UA or blocked
IP's, so this dosnt seem to be what im after.</div>
<div><br>
</div>
<div>I then went digging in the code ( often the best way to
find things ).</div>
in receive.c receive_msg() we find some conditions, where we
drop the packet ( before calling request route ).</div>
<div><br>
</div>
<div>right now im looking around line 251 at </div>
<div>LM_DBG("dropping the received message\n"); </div>
<div>goto error00;</div>
<div><br>
</div>
Following error00 I see it calls STATS_RX_DROPS which increments
stats->received_drops.
<div><font face="SFMono-Regular, Consolas, Liberation Mono,
Menlo, monospace" color="#24292e"><span style="font-size:12px;white-space:pre">
</span></font></div>
This is where it gets fun, I cant find where received_drops is
ever returned in the stats output.<br>
<div>
<div><br>
</div>
<div>I can see where -SIGUSR1 will trigger this to be dumped,
if Kamailio is compiled with that option ( dosnt seem the
debian packages are ). however, what im seeking
clarification on is, does this get reported in "kamctl
stats"</div>
<div><br>
</div>
<div>Am I just going crazy or is something not quite right
here?</div>
<div><br>
</div>
<div>TLDNR; how do I monitor for Kamailio not having enough
worker threads to process incoming messages.</div>
<div><br>
</div>
<div>FYI I'm seeing about 50Mbps of incoming SIP on this box,
and I do perform a decent amount of work on some message
types.</div>
<div><br>
</div>
<div>-- <br>
<div dir="ltr" class="gmail_signature"
data-smartmail="gmail_signature">Sincerely<br>
<br>
Jay</div>
</div>
</div>
</div>
<br>
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<pre class="moz-quote-pre" wrap="">_______________________________________________
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</pre>
</blockquote>
<pre class="moz-signature" cols="72">--
Daniel-Constantin Mierla -- <a class="moz-txt-link-abbreviated" href="http://www.asipto.com">www.asipto.com</a>
<a class="moz-txt-link-abbreviated" href="http://www.twitter.com/miconda">www.twitter.com/miconda</a> -- <a class="moz-txt-link-abbreviated" href="http://www.linkedin.com/in/miconda">www.linkedin.com/in/miconda</a></pre>
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