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<tt>Hi<tt> Rahul,<br>
<br>
<tt>I <tt>tried to rep<tt>roduce <tt>your <tt>scenario<tt>
during the la<tt>st 2 days. <tt>Thanks to the
detailed <tt>instructions and stepping, I man<tt>anged
to <tt>get (as described) to the last <tt>step.
But inste<tt>ad of getting the error you
mentioned, the tcp conn timeout event
was properly handled:<br>
<br>
<tt>[23203]
DBG:core:__tcpconn_lifetime: timeout
for hash=3 - 0x7f94f298fea0 (322
> 317)<br>
[23203] DBG:core:io_watch_del:
[TCP_main] io_watch_del op on index
-1 29 (0x8828a0, 29, -1, 0x10,0x3)
fd_no=22 called<br>
<br>
<tt>Are you sure you are using the
latest GI<tt>T code (I tested both
2.1 and 1.11).<br>
<br>
<tt>Regards,</tt><br>
</tt></tt></tt><br>
</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt>
<pre class="moz-signature" cols="72">Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
<a class="moz-txt-link-freetext" href="http://www.opensips-solutions.com">http://www.opensips-solutions.com</a></pre>
<div class="moz-cite-prefix">On 31.07.2015 17:40, Gupta, Rahul
wrote:<br>
</div>
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<p class="MsoNormal"><span style="color:#1F497D">Hi Bogdan,
thanks for looking into this issue. Let me know if anyway I
can help to get to the bottom of this issue, like providing
logs etc<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Thanks<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Rahul<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #B5C4DF
1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">
Bogdan-Andrei Iancu [<a class="moz-txt-link-freetext" href="mailto:bogdan@opensips.org">mailto:bogdan@opensips.org</a>]
<br>
<b>Sent:</b> Tuesday, July 28, 2015 1:13 PM<br>
<b>To:</b> Gupta, Rahul; <a class="moz-txt-link-abbreviated" href="mailto:users@lists.opensips.org">users@lists.opensips.org</a><br>
<b>Subject:</b> Re: ERROR:core:io_watch_del: BUG -
trying to del fd 38 with flags 2 1<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><tt><span style="font-size:10.0pt">Hi
Rahul,</span></tt><span
style="font-size:10.0pt;font-family:"Courier New""><br>
<br>
<tt>These are great news - that you find a way to reproduce
it. Let me do it and start debugging.</tt><br>
<br>
<tt>I really do appreciate your effort in dealing with this
error.</tt><br>
<br>
<tt>Regards,</tt><br>
<br>
</span><o:p></o:p></p>
<pre>Bogdan-Andrei Iancu<o:p></o:p></pre>
<pre>OpenSIPS Founder and Developer<o:p></o:p></pre>
<pre><a moz-do-not-send="true" href="http://www.opensips-solutions.com">http://www.opensips-solutions.com</a><o:p></o:p></pre>
<div>
<p class="MsoNormal">On 24.07.2015 00:19, Gupta, Rahul wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><span style="color:#1F497D">Hi Bogdan,</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">Almost a
month ago, I have raised the issue regarding the opensips
log file filling up with the following message
</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">ERROR:core:io_watch_del:
BUG - trying to del fd 38 with flags 2 1</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">Now I can
reproduce it every time with the following scenario:</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in"><span
style="color:#1F497D">1)</span><span
style="font-size:7.0pt;font-family:"Times New
Roman","serif";color:#1F497D">
</span><span style="color:#1F497D">UAC and UAS are connected
to opensips proxy with TCP transport</span><o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in"><span
style="color:#1F497D">2)</span><span
style="font-size:7.0pt;font-family:"Times New
Roman","serif";color:#1F497D">
</span><span style="color:#1F497D">Connections looks good</span><o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in"><span
style="color:#1F497D">3)</span><span
style="font-size:7.0pt;font-family:"Times New
Roman","serif";color:#1F497D">
</span><span style="color:#1F497D">Netstat shows the
connection to UAC in ESTABLISHED state and the
tcp_conn_lists of opensips also looks fine for that UAC</span><o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in"><span
style="color:#1F497D">4)</span><span
style="font-size:7.0pt;font-family:"Times New
Roman","serif";color:#1F497D">
</span><span style="color:#1F497D">Now unplug the Ethernet
cable on UAC</span><o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in"><span
style="color:#1F497D">5)</span><span
style="font-size:7.0pt;font-family:"Times New
Roman","serif";color:#1F497D">
</span><span style="color:#1F497D">After tcp connection
timeout (set to 5 mins in opensips.cfg), the tcp
connection goes away from netstat as well as from
tcp_conn_lists</span><o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in"><span
style="color:#1F497D">6)</span><span
style="font-size:7.0pt;font-family:"Times New
Roman","serif";color:#1F497D">
</span><span style="color:#1F497D">UAS tries another tcp
call to the UAC which is still unplugged</span><o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in"><span
style="color:#1F497D">7)</span><span
style="font-size:7.0pt;font-family:"Times New
Roman","serif";color:#1F497D">
</span><span style="color:#1F497D">tcp_conn_lists shows the
tcp connection to the UAC and netstat shows the connection
in SYN_SENT state</span><o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in"><span
style="color:#1F497D">8)</span><span
style="font-size:7.0pt;font-family:"Times New
Roman","serif";color:#1F497D">
</span><span style="color:#1F497D">After the tcp connection
timeout (set to 5 mins in opensips.cfg), the connection
goes away from netstat however it remains there in
tcp_conn_lists and at that moment the “BUG - trying to del
fd 38 with flags 2 1” starts printing in infinite loop.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">I looked at
the source code and observed the following</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in"><span
style="color:#1F497D">1)</span><span
style="font-size:7.0pt;font-family:"Times New
Roman","serif";color:#1F497D">
</span><span style="color:#1F497D">When the network cable is
plugged in </span><o:p></o:p></p>
<p class="MsoListParagraph"><span style="color:#1F497D">The
io_watch_add happens with flag IO_WATCH_READ in tcp_main.c
when the command is CONN_NEW</span><o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in"><span
style="color:#1F497D">2)</span><span
style="font-size:7.0pt;font-family:"Times New
Roman","serif";color:#1F497D">
</span><span style="color:#1F497D">When the network cable is
unplugged</span><o:p></o:p></p>
<p class="MsoListParagraph"><span style="color:#1F497D">The
io_watch_add happens with flag IO_WATCH_WRITE in
tcp_main.c when the command is ASYNC_CONNECT</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in"><span
style="color:#1F497D">3)</span><span
style="font-size:7.0pt;font-family:"Times New
Roman","serif";color:#1F497D">
</span><span style="color:#1F497D">While doing io_watch_del
after timeout, from handle_tcpconn_ev method, io_watch_del
always uses IO_WATCH_READ to delete the fd, which gives
this error in case of unplugged cable.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">Please look
into this and suggest how can I fix this issue ?</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">Thanks</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">Rahul Gupta</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoListParagraph"><span style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p>
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