<p>Hi,</p>
<p>It happened again, I checked the captures and this is what is happening during the issue:</p>
<p>From KamailioB to KamailioC/D</p>
<ol>
<li>Kamailio B is sending OPTIONS to KamailioC/D.</li>
<li>KamailioC/D are replying 200.</li>
<li>Kamailio B is not acting to those 200 and has the nodes DOWN (probably because it is in that "hung" state).</li>
</ol>
<p>At the same time:</p>
<p>From KamailioC/D to KamailioB</p>
<ol>
<li>KamailioC/D are sending OPTIONS to KamailioB.</li>
<li>KamailioB is NOT replying anything.</li>
</ol>
<p>This time I had to restart Kamailio and it started working right away again.</p>
<p><a href="https://github.com/kamailio/kamailio/files/1117612/backtrace_20170701_2001.tar.gz">backtrace_20170701_2001.tar.gz</a></p>
<p>Sorry for so many posts, but I update this as things happen.</p>

<p style="font-size:small;-webkit-text-size-adjust:none;color:#666;">—<br />You are receiving this because you are subscribed to this thread.<br />Reply to this email directly, <a href="https://github.com/kamailio/kamailio/issues/1172#issuecomment-312470108">view it on GitHub</a>, or <a href="https://github.com/notifications/unsubscribe-auth/AF36ZZfY_WYe7l6kkC9ktxskKStYx-qdks5sJxudgaJpZM4OIFBs">mute the thread</a>.<img alt="" height="1" src="https://github.com/notifications/beacon/AF36ZdtskZIY3wD_NXXSgB2vy1QQZvBtks5sJxudgaJpZM4OIFBs.gif" width="1" /></p>
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