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<p class="MsoNormal"><span style="font-size:11.0pt">Never mind for the problem of CRIU (tainted). I have upgraded CRIU from 3.6 to 3.10, which have fixed the problem. Now all the checks say “looks good.”<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p>&nbsp;</o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">However, I still have the following issue: when I try to restore a checkpoint, I get the following error<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p>&nbsp;</o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">“Error response from daemon: failed to retrieve OCI runtime container pid: open /run/docker/containerd/daemon/io.containerd.runtime.v1.linux/moby/7400b12f7ce1da658d44da9349893f40ff7ae512d0479fe116df16c399f1f741/init.pid:
 no such file or directory: unknown”<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p>&nbsp;</o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">How can I fix this problem?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p>&nbsp;</o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I am running on Ubuntu 18.04 (running via Parallels on MacOS). CRIU version: 3.10. Docker version: “Version: 18.06.1-ce , API version: 1.38”.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p>&nbsp;</o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p>&nbsp;</o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Thank you so much for the help.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Marco<o:p></o:p></span></p>
<div>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black">--------------------------------------------------------------------------------------------------<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black">Marco Brocanelli, Ph.D.,<br>
Assistant Professor,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black">Department of Computer Science,<br>
Wayne State University,<br>
<a href="https://engineering.wayne.edu/profile/gt2504"><span style="color:#954F72">https://engineering.wayne.edu/profile/gt2504</span></a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black">--------------------------------------------------------------------------------------------------<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt"><o:p>&nbsp;</o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p>&nbsp;</o:p></span></p>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="color:black">From: </span></b><span style="color:black">Marco BROCANELLI &lt;brok@wayne.edu&gt;<br>
<b>Date: </b>Friday, October 12, 2018 at 4:30 PM<br>
<b>To: </b>&quot;criu@openvz.org&quot; &lt;criu@openvz.org&gt;<br>
<b>Subject: </b>problem with CRIU<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt"><o:p>&nbsp;</o:p></span></p>
</div>
<p class="MsoNormal"><span style="font-size:11.0pt">Hi,</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I have installed CRIU (v. 3.6) and run the check. Here are the results:</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">&nbsp;</span><o:p></o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level1 lfo3"><span style="font-size:11.0pt">“criu check” -&gt; looks good</span><o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level1 lfo3"><span style="font-size:11.0pt">“criu check --extra” -&gt; looks good</span><o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level1 lfo3"><span style="font-size:11.0pt">“criu check --all” -&gt; “Warn&nbsp; (criu/cr-check.c:1029): CRIU built without CONFIG_COMPAT - can't C/R ia32. Looks good but some kernel features are missing
 which, depending on your process tree, may cause dump or restore failure.” How do I fix this? I run the zdtm test and got “The kernel is tainted:..” Do I get the warning from criu check –all because my kernel is tainted?
</span><o:p></o:p></li></ul>
<p class="MsoNormal"><span style="font-size:11.0pt">&nbsp;</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I have been trying to checkpoint and restore but at the time of the restore I always get the error: “Error response from daemon: failed to retrieve OCI runtime container pid:…”
</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">&nbsp;</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Are the two problems related? I followed the example available here for the checkpointing:
<a href="https://criu.org/Docker">https://criu.org/Docker</a></span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">&nbsp;</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">The experimental feature is enabled in both client and server. The checkpoint file is correctly created. However, I have also noticed that the looper in the example does NOT stop after issuing the command
 “docker checkpoint create looper checkpoint1”. According to the above guide it should stop, right?</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">&nbsp;</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Can you please help me debug this?</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">&nbsp;</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I am running on Ubuntu 18.04 (running via Parallels on MacOS). CRIU version: 3.6. Docker version: “Version: 18.06.1-ce , API version: 1.38”.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">&nbsp;</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Thank you so much for any suggestions,</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Marco</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">&nbsp;</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black">--------------------------------------------------------------------------------------------------</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black">Marco Brocanelli, Ph.D.,<br>
Assistant Professor,</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black">Department of Computer Science,<br>
Wayne State University,<br>
<a href="https://engineering.wayne.edu/profile/gt2504"><span style="color:#954F72">https://engineering.wayne.edu/profile/gt2504</span></a></span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black">--------------------------------------------------------------------------------------------------</span><o:p></o:p></p>
<p class="MsoNormal">&nbsp;<o:p></o:p></p>
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