<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Consolas;
panose-1:2 11 6 9 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:#954F72;
text-decoration:underline;}
pre
{mso-style-priority:99;
mso-style-link:"HTML Preformatted Char";
margin:0in;
margin-bottom:.0001pt;
font-size:10.0pt;
font-family:"Courier New";}
tt
{mso-style-priority:99;
font-family:"Courier New";}
p.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph
{mso-style-priority:34;
margin-top:0in;
margin-right:0in;
margin-bottom:0in;
margin-left:.5in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Calibri",sans-serif;}
p.msonormal0, li.msonormal0, div.msonormal0
{mso-style-name:msonormal;
mso-margin-top-alt:auto;
margin-right:0in;
mso-margin-bottom-alt:auto;
margin-left:0in;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
span.HTMLPreformattedChar
{mso-style-name:"HTML Preformatted Char";
mso-style-priority:99;
mso-style-link:"HTML Preformatted";
font-family:Consolas;}
span.EmailStyle22
{mso-style-type:personal;
font-family:"Calibri",sans-serif;
color:windowtext;}
span.EmailStyle23
{mso-style-type:personal;
font-family:"Calibri",sans-serif;
color:windowtext;}
span.EmailStyle24
{mso-style-type:personal;
font-family:"Calibri",sans-serif;
color:windowtext;}
span.EmailStyle25
{mso-style-type:personal;
font-family:"Calibri",sans-serif;
color:windowtext;}
span.EmailStyle26
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style>
</head>
<body lang="EN-US" link="#0563C1" vlink="#954F72">
<div class="WordSection1">
<p class="MsoNormal"><span style="font-size:11.0pt">Bogdan,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I no longer have the original backtrace I posted in May, but if it was the same issue then it has only happened those two times, both when under load. I have not been able to reproduce it reliably or with
single calls.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">For the double ACK, so if the MF value is changed then it is not just traced twice it was actually sent twice. But what scenario would cause retransmission of a hop-by-hop ACK? I can’t think of one. So it
still seems strange. But it may be a symptom of the issue and not a cause.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black">Ben Newlin </span>
<span style="font-size:11.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="color:black">From: </span></b><span style="color:black">Bogdan-Andrei Iancu <bogdan@opensips.org><br>
<b>Date: </b>Friday, June 7, 2019 at 9:15 AM<br>
<b>To: </b>Ben Newlin <Ben.Newlin@genesys.com>, OpenSIPS devel mailling list <devel@lists.opensips.org><br>
<b>Subject: </b>Re: [OpenSIPS-Devel] OpenSIPS Crash<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
</div>
<p class="MsoNormal"><tt><span style="font-size:10.0pt">Hi Ben,</span></tt><span style="font-size:10.0pt;font-family:"Courier New""><br>
<br>
<tt>How often/easy is to reproduce this crash (if possible) ? Brainstorming with Razvan, we suspect a race (on the msg save in shmem in transaction) between the process doing the cleanup after the async resume and the process running the failure route (due
th 503).</tt><br>
<br>
<tt>But this is just a supposition, eventually you can validate it or not by removing the async ??</tt><br>
<br>
<tt>And on the double ACK - I'm not 100% it is a actually a double one, as the second has a smaller MF value (69, versus the 70 on the first ACK).
</tt><br>
<br>
<tt>Regards,</tt><br>
<br>
</span><o:p></o:p></p>
<pre>Bogdan-Andrei Iancu<o:p></o:p></pre>
<pre><o:p> </o:p></pre>
<pre>OpenSIPS Founder and Developer<o:p></o:p></pre>
<pre> <a href="https://www.opensips-solutions.com">https://www.opensips-solutions.com</a><o:p></o:p></pre>
<pre>OpenSIPS Summit 2019<o:p></o:p></pre>
<pre> <a href="https://www.opensips.org/events/Summit-2019Amsterdam/">https://www.opensips.org/events/Summit-2019Amsterdam/</a><o:p></o:p></pre>
<div>
<p class="MsoNormal">On 06/07/2019 03:52 PM, Ben Newlin wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><span style="font-size:11.0pt">Bogdan,</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Sorry, I should have thought to actually look at the trace and examine this call.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">1) Yes</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">2) The Called Party is 10.32.20.60, which is another OpenSIPS instance. The crashed instance received the "503 Service Unavailable" approximately 8-10 ms after sending the INVITE.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">There is a SIP trace of the exchange here:
<a href="https://pastebin.com/6bttsSVD">
https://pastebin.com/6bttsSVD</a>.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">One oddity I saw is that the crashed process appears to send (or at least siptrace) the ACK twice.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black">Ben Newlin </span>
<o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="color:black">From: </span></b><span style="color:black">Bogdan-Andrei Iancu
<a href="mailto:bogdan@opensips.org"><bogdan@opensips.org></a><br>
<b>Date: </b>Thursday, June 6, 2019 at 11:42 AM<br>
<b>To: </b>OpenSIPS devel mailling list <a href="mailto:devel@lists.opensips.org">
<devel@lists.opensips.org></a>, Ben Newlin <a href="mailto:Ben.Newlin@genesys.com">
<Ben.Newlin@genesys.com></a><br>
<b>Subject: </b>Re: [OpenSIPS-Devel] OpenSIPS Crash</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
</div>
<p class="MsoNormal"><tt><span style="font-size:10.0pt">Hi Ben,</span></tt><span style="font-size:10.0pt;font-family:"Courier New""><br>
<br>
<tt>Thanks for "another" report :).</tt><br>
<br>
<tt>Questions:</tt><br>
<tt>1) do you do any async for the INVITE in this crash ?</tt><br>
<tt>2) if it is an YES to (1), is the caller party generating the "503 Service Unavailable" (which triggers the crash) - 10.32.20.60 ?? - a really close (from net delay perspective) and fast to answer party ?</tt><br>
<br>
<tt>Regards,</tt><br>
<br>
<br>
</span><o:p></o:p></p>
<pre>Bogdan-Andrei Iancu<o:p></o:p></pre>
<pre> <o:p></o:p></pre>
<pre>OpenSIPS Founder and Developer<o:p></o:p></pre>
<pre> <a href="https://www.opensips-solutions.com">https://www.opensips-solutions.com</a><o:p></o:p></pre>
<pre>OpenSIPS Summit 2019<o:p></o:p></pre>
<pre> <a href="https://www.opensips.org/events/Summit-2019Amsterdam/">https://www.opensips.org/events/Summit-2019Amsterdam/</a><o:p></o:p></pre>
<div>
<p class="MsoNormal">On 06/05/2019 10:02 PM, Ben Newlin wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><span style="font-size:11.0pt">We have had another crash today.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Backtrace is here: <a href="https://pastebin.com/q4RQC7kS">
https://pastebin.com/q4RQC7kS</a></span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I found this in the log at the time of the crash:</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Jun 5 17:54:10 [4978] CRITICAL:core:sig_usr: segfault in process pid: 4978, id: 8</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Please let me know if any further information can be useful.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black">Ben Newlin </span>
<o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="color:black">From: </span></b><span style="color:black">Devel
<a href="mailto:devel-bounces@lists.opensips.org"><devel-bounces@lists.opensips.org></a> on behalf of Ben Newlin
<a href="mailto:Ben.Newlin@genesys.com"><Ben.Newlin@genesys.com></a><br>
<b>Reply-To: </b>OpenSIPS devel mailling list <a href="mailto:devel@lists.opensips.org">
<devel@lists.opensips.org></a><br>
<b>Date: </b>Friday, May 10, 2019 at 6:31 PM<br>
<b>To: </b>OpenSIPS devel mailling list <a href="mailto:devel@lists.opensips.org">
<devel@lists.opensips.org></a><br>
<b>Subject: </b>Re: [OpenSIPS-Devel] OpenSIPS Crash</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
</div>
<p class="MsoNormal"><span style="font-size:11.0pt">I found this in the log at the time of the crash:</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">kernel: opensips[5003]: segfault at 30 ip 00007fbd4c8f59d0 sp 00007ffcaa850c80 error 6 in tm.so[7fbd4c887000+8e000]</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black">Ben Newlin </span>
<o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="color:black">From: </span></b><span style="color:black">Devel
<a href="mailto:devel-bounces@lists.opensips.org"><devel-bounces@lists.opensips.org></a> on behalf of Ben Newlin
<a href="mailto:Ben.Newlin@genesys.com"><Ben.Newlin@genesys.com></a><br>
<b>Reply-To: </b>OpenSIPS devel mailling list <a href="mailto:devel@lists.opensips.org">
<devel@lists.opensips.org></a><br>
<b>Date: </b>Friday, May 10, 2019 at 5:44 PM<br>
<b>To: </b>OpenSIPS devel mailling list <a href="mailto:devel@lists.opensips.org">
<devel@lists.opensips.org></a><br>
<b>Subject: </b>[OpenSIPS-Devel] OpenSIPS Crash</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
</div>
<p class="MsoNormal"><span style="font-size:11.0pt">Hello,</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">We had a crash today of our OpenSIPS instance.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Backtrace is here: </span><a href="https://pastebin.com/QbRJimwx">https://pastebin.com/QbRJimwx</a><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"># opensips -V</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">version: opensips 2.4.5 (x86_64/linux)</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">flags: STATS: On, DISABLE_NAGLE, USE_MCAST, SHM_MMAP, PKG_MALLOC, F_MALLOC, FAST_LOCK-ADAPTIVE_WAIT</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16, MAX_URI_SIZE 1024, BUF_SIZE 65535</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">poll method support: poll, epoll, sigio_rt, select.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">git revision: d025b4f61</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">main.c compiled on 20:58:31 May 9 2019 with gcc 7</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black">Ben Newlin </span>
<o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><br>
<br>
<br>
<br>
</span><o:p></o:p></p>
<pre>_______________________________________________<o:p></o:p></pre>
<pre>Devel mailing list<o:p></o:p></pre>
<pre><a href="mailto:Devel@lists.opensips.org">Devel@lists.opensips.org</a><o:p></o:p></pre>
<pre><a href="http://lists.opensips.org/cgi-bin/mailman/listinfo/devel">http://lists.opensips.org/cgi-bin/mailman/listinfo/devel</a><o:p></o:p></pre>
</blockquote>
<p class="MsoNormal"><span style="font-size:11.0pt"><br>
<br>
<br>
</span><o:p></o:p></p>
</blockquote>
<p class="MsoNormal"><span style="font-size:11.0pt"><br>
<br>
<o:p></o:p></span></p>
</div>
</body>
</html>