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    <font face="monospace">Just as a quick update here, the whole
      troubleshooting is undergoing in the GH ticket, as Ben mentioned.<br>
      <br>
      And so far, a it seems to be TLS specific, not TPC, and even more,
      to be related to the TLS async writing. For the moment it's
      WIP.....<br>
      <br>
      Best regards,<br>
    </font>
    <pre class="moz-signature" cols="72">Bogdan-Andrei Iancu

OpenSIPS Founder and Developer
  <a class="moz-txt-link-freetext" href="https://www.opensips-solutions.com">https://www.opensips-solutions.com</a>
OpenSIPS eBootcamp 2021 
  <a class="moz-txt-link-freetext" href="https://opensips.org/training/OpenSIPS_eBootcamp_2021/">https://opensips.org/training/OpenSIPS_eBootcamp_2021/</a></pre>
    <div class="moz-cite-prefix">On 1/12/22 2:59 AM, Ben Newlin wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:BN0PR10MB5208EE5D96DF7441B0FB3CA395529@BN0PR10MB5208.namprd10.prod.outlook.com">
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        <p class="MsoNormal">We are just migrating to OpenSIPS 3.2 and I
          also have seen these errors, though I saw them under
          significant load.<o:p></o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal">I opened a Github issue for it here: <a
            href="https://github.com/OpenSIPS/opensips/issues/2724"
            moz-do-not-send="true">
            https://github.com/OpenSIPS/opensips/issues/2724</a><o:p></o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <div>
          <p class="MsoNormal"><span style="color:black">Ben Newlin </span><o:p></o:p></p>
        </div>
        <p class="MsoNormal"><o:p> </o:p></p>
        <div style="border:none;border-top:solid #B5C4DF
          1.0pt;padding:3.0pt 0in 0in 0in">
          <p class="MsoNormal" style="margin-bottom:12.0pt"><b><span
                style="font-size:12.0pt;color:black">From:
              </span></b><span style="font-size:12.0pt;color:black">Users
              <a class="moz-txt-link-rfc2396E" href="mailto:users-bounces@lists.opensips.org"><users-bounces@lists.opensips.org></a> on behalf of Jeff
              Pyle <a class="moz-txt-link-rfc2396E" href="mailto:jeff@ugnd.org"><jeff@ugnd.org></a><br>
              <b>Date: </b>Tuesday, January 11, 2022 at 7:25 PM<br>
              <b>To: </b>OpenSIPS users mailling list
              <a class="moz-txt-link-rfc2396E" href="mailto:users@lists.opensips.org"><users@lists.opensips.org></a><br>
              <b>Subject: </b>[OpenSIPS-Users] TCP-related errors<o:p></o:p></span></p>
        </div>
        <div>
          <div>
            <p class="MsoNormal">Hello,<o:p></o:p></p>
          </div>
          <div>
            <p class="MsoNormal"><o:p> </o:p></p>
          </div>
          <div>
            <p class="MsoNormal">I have two similarly configured systems
              running a recent OpenSIPS 3.2 with may errors like this:<o:p></o:p></p>
          </div>
          <div>
            <p class="MsoNormal"><o:p> </o:p></p>
          </div>
          <div>
            <div style="margin-left:30.0pt">
              <p class="MsoNormal">CRITICAL:core:io_watch_add: <br>
                >>> fd_array idx 1 (fd=193) points to bogus map
                (fd=-1,type=0,flags=20000000,data=(nil))<br>
                <br>
                It seems you have hit a programming bug.<br>
                Please help us make OpenSIPS better by reporting it at <a
                  href="https://github.com/OpenSIPS/opensips/issues"
                  moz-do-not-send="true">
                  https://github.com/OpenSIPS/opensips/issues</a><o:p></o:p></p>
            </div>
            <p class="MsoNormal"><o:p> </o:p></p>
          </div>
          <div>
            <p class="MsoNormal">and<o:p></o:p></p>
          </div>
          <div>
            <p class="MsoNormal"><o:p> </o:p></p>
          </div>
          <div style="margin-left:30.0pt">
            <p class="MsoNormal">ERROR:tls_openssl:openssl_tls_async_connect:
              failed to retrieve SO_ERROR [server=<a
                href="http://52.114.76.76:5061" moz-do-not-send="true">52.114.76.76:5061</a>]
              (3) No such process<br>
              ERROR:proto_tls:tls_async_write: failed to do pre-tls
              handshake!<br>
              ERROR:tls_openssl:openssl_tls_accept: SSL_ERROR_SYSCALL
              err=Success(0)<br>
              ERROR:tls_openssl:openssl_tls_accept: New TLS connection
              from <a href="http://52.114.32.169:6912"
                moz-do-not-send="true">
                52.114.32.169:6912</a> failed to accept<br>
              ERROR:proto_tls:tls_read_req: failed to do pre-tls
              handshake!<br>
              ERROR:tls_openssl:openssl_tls_accept: SSL_ERROR_SYSCALL
              err=Success(0)<br>
              ERROR:tls_openssl:openssl_tls_accept: New TLS connection
              from <a href="http://52.114.132.46:3008"
                moz-do-not-send="true">
                52.114.132.46:3008</a> failed to accept<br>
              ERROR:proto_tls:tls_read_req: failed to do pre-tls
              handshake!<br>
              ERROR:tls_openssl:openssl_tls_accept: SSL_ERROR_SYSCALL
              err=Success(0)<br>
              ERROR:tls_openssl:openssl_tls_accept: New TLS connection
              from <a href="http://52.114.32.169:3072"
                moz-do-not-send="true">
                52.114.32.169:3072</a> failed to accept<o:p></o:p></p>
          </div>
          <div style="margin-left:30.0pt">
            <p class="MsoNormal"><o:p> </o:p></p>
          </div>
          <div>
            <p class="MsoNormal">I'm wondering if this is truly a bug as
              the text suggests, or if I have a misconfiguration.  I
              increased the number of file descriptors available to
              opensips in /etc/security/limits.conf on one of the
              systems about 10 minutes ago, and so far, no more errors. 
              Normally I would have seen them by now.<o:p></o:p></p>
          </div>
          <div>
            <p class="MsoNormal"><o:p> </o:p></p>
          </div>
          <div>
            <p class="MsoNormal">Both systems have low traffic, less
              than 1 cps.<o:p></o:p></p>
          </div>
          <div>
            <p class="MsoNormal"><o:p> </o:p></p>
          </div>
          <div>
            <p class="MsoNormal">I don't have a lot of experience using
              OpenSIPS with TCP.  It wouldn't surprise me if I've missed
              something.<o:p></o:p></p>
          </div>
          <div>
            <p class="MsoNormal"><o:p> </o:p></p>
          </div>
          <div>
            <p class="MsoNormal"><o:p> </o:p></p>
          </div>
          <div>
            <p class="MsoNormal"><o:p> </o:p></p>
          </div>
          <div>
            <p class="MsoNormal">- Jeff<o:p></o:p></p>
          </div>
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            <p class="MsoNormal"><o:p> </o:p></p>
          </div>
          <div>
            <p class="MsoNormal"><o:p> </o:p></p>
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      <pre class="moz-quote-pre" wrap="">_______________________________________________
Users mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Users@lists.opensips.org">Users@lists.opensips.org</a>
<a class="moz-txt-link-freetext" href="http://lists.opensips.org/cgi-bin/mailman/listinfo/users">http://lists.opensips.org/cgi-bin/mailman/listinfo/users</a>
</pre>
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