<div dir="ltr">> I don't think it is a socket issue because I can connect successfully with 'telnet'.<div><br></div><div>tcpdump gives more information(rabbit also binds to <a href="http://10.4.16.12:5672">10.4.16.12:5672</a>):</div>
<div style>1. the tcp connection is successfully setup</div><div style>2. client sends a packet to server</div><div style>3. server sends a packet to client</div><div style>4. client sends another packet to server, server replies with ack followed by a reset packet.</div>
<div style><br></div><div style> tcpdump output:</div><div><div>18:38:08.396524 IP 192.168.20.41.61353 > 10.4.16.12.5672: Flags [S], seq 3696040838, win 14600, options [mss 1460,nop,nop,sackOK,nop,wscale 9], length 0</div>
<div>18:38:08.396716 IP 10.4.16.12.5672 > 192.168.20.41.61353: Flags [S.], seq 2115356865, ack 3696040839, win 14600, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0</div><div>18:38:08.396869 IP 192.168.20.41.61353 > 10.4.16.12.5672: Flags [.], ack 2115356866, win 29, length 0</div>
<div>18:38:08.397156 IP 192.168.20.41.61353 > 10.4.16.12.5672: Flags [P.], seq 3696040839:3696040847, ack 2115356866, win 29, length 8</div><div>18:38:08.397467 IP 10.4.16.12.5672 > 192.168.20.41.61353: Flags [.], ack 3696040847, win 115, length 0</div>
<div>18:38:08.397899 IP 10.4.16.12.5672 > 192.168.20.41.61353: Flags [P.], seq 2115356866:2115357201, ack 3696040847, win 115, length 335</div><div>18:38:08.397993 IP 192.168.20.41.61353 > 10.4.16.12.5672: Flags [.], ack 2115357201, win 31, length 0</div>
<div>18:38:08.399485 IP 192.168.20.41.61353 > 10.4.16.12.5672: Flags [P.], seq 3696040847:3696041097, ack 2115357201, win 31, length 250</div><div>18:38:08.436617 IP 10.4.16.12.5672 > 192.168.20.41.61353: Flags [.], ack 3696041097, win 123, length 0</div>
<div>18:38:11.401038 IP 10.4.16.12.5672 > 192.168.20.41.61353: Flags [R.], seq 2115357201, ack 3696041097, win 123, length 0</div><div class="gmail_extra"><br><br><div class="gmail_quote">On Sun, Jul 14, 2013 at 6:17 PM, Rubo Liang <span dir="ltr"><<a href="mailto:liangrubo@bytedance.com" target="_blank">liangrubo@bytedance.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="ltr">Hi,<div><br></div><div>I didn't take any action on this during this period of time and the problem remains( Server B and server C are clustered and I can connect to neither B nor C).</div>
<div>
<br></div><div>I don't think it is a socket issue because I can connect successfully with 'telnet'.</div><div><br></div><div>Logs in the log file seems abnormal:<br></div><div>1. no client is connected to the cluster, but rabbit emits "=INFO REPORT====" and "=WARNING REPORT===" pairs to the log file every 5 seconds(see below).</div>
<div>2. 10.4.16.221 is a virtual ip which rabbit binds to, the log shows connections are from 10.4.16.221, why is this?</div><div><br></div><div>log example:</div><div><br></div><div><div>=INFO REPORT==== 14-Jul-2013::18:06:01 ===</div>
<div>accepting AMQP connection <0.19551.11> (<a href="http://10.4.16.221:42919" target="_blank">10.4.16.221:42919</a> -> <a href="http://10.4.16.221:5672" target="_blank">10.4.16.221:5672</a>)</div><div><br></div>
<div>=WARNING REPORT==== 14-Jul-2013::18:06:01 ===</div>
<div>closing AMQP connection <0.19551.11> (<a href="http://10.4.16.221:42919" target="_blank">10.4.16.221:42919</a> -> <a href="http://10.4.16.221:5672" target="_blank">10.4.16.221:5672</a>):</div><div>connection_closed_abruptly</div>
<div><br></div>
<div>=INFO REPORT==== 14-Jul-2013::18:06:06 ===</div><div>accepting AMQP connection <0.19556.11> (<a href="http://10.4.16.221:42920" target="_blank">10.4.16.221:42920</a> -> <a href="http://10.4.16.221:5672" target="_blank">10.4.16.221:5672</a>)</div>
<div><br></div><div>=WARNING REPORT==== 14-Jul-2013::18:06:06 ===</div><div>closing AMQP connection <0.19556.11> (<a href="http://10.4.16.221:42920" target="_blank">10.4.16.221:42920</a> -> <a href="http://10.4.16.221:5672" target="_blank">10.4.16.221:5672</a>):</div>
<div>connection_closed_abruptly</div></div><div><br></div><div>Thanks,</div><div>Robert</div><div><br></div><div><br></div><div class="gmail_extra"><br><br><div class="gmail_quote"><div><div class="h5">On Fri, Jul 12, 2013 at 7:08 PM, Michael Klishin <span dir="ltr"><<a href="mailto:mklishin@gopivotal.com" target="_blank">mklishin@gopivotal.com</a>></span> wrote:<br>
</div></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div><div class="h5">Rubo Liang:<br>
<div><br>
> I guess this won't cause the problem I got, right?<br>
><br>
> I left the problem as it was for further investigation, is there any suggestion on debugging this problem?<br>
<br>
</div>correct, this likely is caused by your socket issue, not the other way around.<br>
--<br>
MK<br>
<br>
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