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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>People, I’m getting desperate here…
anyone from ERLANG development team care to comment?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>V.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
owner-erlang-questions@erlang.org [mailto:owner-erlang-questions@erlang.org] <b><span
style='font-weight:bold'>On Behalf Of </span></b>Valentin Micic [ MTN -
Innovation Centre ]<br>
<b><span style='font-weight:bold'>Sent:</span></b> Wednesday, 31 May 2006 10:33
AM<br>
<b><span style='font-weight:bold'>To:</span></b> erlang-questions@erlang.org<br>
<b><span style='font-weight:bold'>Cc:</span></b> Ognian Pantov [ MTN -
Innovation Centre ]; Primanathan Reddy [ MTN - Innovation Centre ]; Wayne Swart
[ MTN - Innovation Centre ]<br>
<b><span style='font-weight:bold'>Subject:</span></b> Erlang R9C-2 NODE stops
accepting new connections</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-ZA style='font-size:
10.0pt;font-family:Arial'>Hi,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-ZA style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-ZA style='font-size:
10.0pt;font-family:Arial'>We have a reoccurring problem on one of our nodes,
call it node1@host1.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-ZA style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-ZA style='font-size:
10.0pt;font-family:Arial'>Under some circumstances (we suspect intermittent network
instability), the main listening port (the port that is published with EPMD)
stops accepting new connections.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-ZA style='font-size:
10.0pt;font-family:Arial'>The active connections are serviced though. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-ZA style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-ZA style='font-size:
10.0pt;font-family:Arial'>I did verify that empd (using epmd –names) has
an entry indicating node1 and port, say, P1.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-ZA style='font-size:
10.0pt;font-family:Arial'>Using netstat, I did verify that port P1 is used.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-ZA style='font-size:
10.0pt;font-family:Arial'>I’ve used pfiles (Solaris 9) to verify that
this port is used by this particular run-time (node1@host1).<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-ZA style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-ZA style='font-size:
10.0pt;font-family:Arial'>Finally, in desperation, I’ve attempted to
telnet to this particular port, and noticed that netstat reports SYN_SENT, but
no further action is taken.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-ZA style='font-size:
10.0pt;font-family:Arial'>This indicates a potential problem with SOLARIS,
however, had a similar situation on LINUX as well, thus, concluding that it
might be ERLANG related.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-ZA style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-ZA style='font-size:
10.0pt;font-family:Arial'>It seems that erlang process that is servicing this
erlang port (linked-in tcp driver) somehow lost a link to it, however without
terminating it, as indicated by messege:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-ZA style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-ZA style='font-size:
10.0pt;font-family:Arial'>#Port<0.7>: tcp_inet: Input driver gone away
without deselecting!<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-ZA style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-ZA style='font-size:
10.0pt;font-family:Arial'>Any ideas?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-ZA style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-ZA style='font-size:
10.0pt;font-family:Arial'>V.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-ZA style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><br>
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