<div dir="ltr">Are you doing external checkpoint restore, calling CRIU directly to dump and restore the container, or are you using native "docker checkpoint" and "docker restore" commands? If latter, did you integrate C/R functionality into Docker yourself?<div><br></div><div>--Saied</div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Jul 17, 2015 at 5:56 AM, Yanbao Cui <span dir="ltr"><<a href="mailto:yygcui@gmail.com" target="_blank">yygcui@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">I use docker 1.6.0 and 1.6.2, they all have this problem.<div><br></div><div>the needed files are shared via NFS.</div></div><div class="gmail_extra"><div><div class="h5"><br><div class="gmail_quote">On Fri, Jul 17, 2015 at 11:15 AM, Saied Kazemi <span dir="ltr"><<a href="mailto:saied@google.com" target="_blank">saied@google.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Which Docker version are you using to checkpoint and restore your containers? Also, for migration, are you manually copying the container to a target machine?<div><br></div><div>--Saied</div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote"><div><div>On Tue, Jul 14, 2015 at 7:36 AM, Yanbao Cui <span dir="ltr"><<a href="mailto:yygcui@gmail.com" target="_blank">yygcui@gmail.com</a>></span> wrote:<br></div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div><p dir="ltr">Correct my reply:</p>
<p dir="ltr">_existing_ migrated connections hang.</p>
<p dir="ltr">New connection (here I mean new socket or a new process, not as like reconnection manually) is OK<br><br></p>
<br><div class="gmail_quote"><div dir="ltr">Yanbao Cui <<a href="mailto:yygcui@gmail.com" target="_blank">yygcui@gmail.com</a>>于2015年7月14日 周二 22:07写道：<br></div><div><div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><p dir="ltr">_existing_ migrated connections hang.</p>
<p dir="ltr">New connection is OK</p>
<br><div class="gmail_quote"><div dir="ltr">Pavel Emelyanov <<a href="mailto:xemul@parallels.com" target="_blank">xemul@parallels.com</a>>于2015年7月14日 周二 21:59写道：<br></div></div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On 07/14/2015 04:43 PM, Yanbao Cui wrote:<br>
> Server is working always and waiting. It seems the client, which is in the container, cannot send data out after restored.<br>
><br>
> For TCP, yeah, the client try to reconnect manually.<br>
<br>
You mean that after restore new connect()-s hang for a while? Why do these connect()-s happen?<br>
Or _existing_ migrated connections hang?<br>
<br>
> The delay is happened after restore successful, although the network is recovered<br>
><br>
><br>
> Pavel Emelyanov <<a href="mailto:xemul@parallels.com" target="_blank">xemul@parallels.com</a> <mailto:<a href="mailto:xemul@parallels.com" target="_blank">xemul@parallels.com</a>>>于2015年7月14日 周二 21:31写道：<br>
><br>
> On 07/14/2015 04:15 PM, Yanbao Cui wrote:<br>
> > Sorry for mistake.<br>
> > For UDP, I mean the sever can receive the packet from client again.<br>
><br>
> So where's the 0.5 seconds delay? Server sleeps and doesn't wake up, packets<br>
> do not reach the server or something else?<br>
><br>
> > Actually, I have analysis the tcpdump output, in my case, the client try to reconnect<br>
> > to the server again, but can not receive SYN+ACK, so it re-transmission after 1 second<br>
> > according to the client rule, and then try again.<br>
><br>
> During migration we don't reconnect TCP (with regular SYN, SYNACK, ACK sequence),<br>
> do you reconnect them manually?<br>
><br>
> -- Pavel<br>
><br>
<br>
</blockquote></div></blockquote></div></div></div>
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</blockquote></div><br><br clear="all"><div><br></div></div></div><span class="">-- <br><div><font color="#3333ff"><div><font color="#3333ff">Best Regards</font></div><div><font color="#3333ff">Cui Yanbao | 崔言宝</font></div><div><font color="#3333ff">--</font></div>龍生玖天，豈能安於凡塵！</font></div>
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