<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=us-ascii">
<meta name="Generator" content="Microsoft Word 12 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
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:11.0pt;
font-family:"Calibri","sans-serif";}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri","sans-serif";
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
/* List Definitions */
@list l0
{mso-list-id:156850056;
mso-list-type:hybrid;
mso-list-template-ids:1443269176 67698705 67698713 67698715 67698703 67698713 67698715 67698703 67698713 67698715;}
@list l0:level1
{mso-level-text:"%1\)";
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
ol
{margin-bottom:0in;}
ul
{margin-bottom:0in;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="EN-US" link="blue" vlink="purple">
<div class="WordSection1">
<p class="MsoNormal">Hello everyone,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have a FreeSWITCH instance that has been running for months without an issue, until last Monday. The setup is for a hotline where we receive incoming calls transferred from the Client Cisco UCM to our FreeSWITCH instance, and the calls
are handled by a custom Java application via ESL.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">As I said it was working flawlessly for weeks, but last Monday FreeSWITCH just stopped accepting new calls. I was able to see the SIP messages flowing back and forth from FS<->UCM, but looks like FreeSWITCH was unable to create new channels.
Once I restarted FreeSWITCH everything was back to normal. Here are links to the SIP/console logs I was able to capture which covers both scenarios (non-working FS and working FS):<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Non-working: <a href="http://pastebin.freeswitch.org/20275">
http://pastebin.freeswitch.org/20275</a><o:p></o:p></p>
<p class="MsoNormal">Working: <a href="http://pastebin.freeswitch.org/20274">http://pastebin.freeswitch.org/20274</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">As you can see, in the non-working scenario no channels were created on FreeSWITCH, so no 200 ACK message was sent back to UCM after the INVITE, which caused the UCM to send a CANCEL message after a few seconds and a 487 Request terminated
from FS -> UCM. Restarting the application fixed the issue, but I have a couple of questions regarding this:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">1)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>We have a lot of monitoring in place for all our applications, and I could probably alerted our Operations team if FreeSWITCH crashed or some error was logged in the FS log. However I was unable to found anything meaningful in the logs
that indicates any sort of error. It just suddenly stopped creating new channels, and we get the alert/complain from the client – ouch!<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">2)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>I was also not sure what other information I should collect when something like this happens. As the application didn’t crash it didn’t create any coredump files. I know that restarting it fixes the problem, but that is not what the
client wants to hear.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Any recommendations on what to do/look at to proactively detect this kind of issues and/or how to collect the appropriate info to get the root cause will be greatly appreciated.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thank you all for your time,<o:p></o:p></p>
<p class="MsoNormal">Hector<o:p></o:p></p>
</div>
</body>
</html>