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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">As Kai Qiang mentioned, magnum gate recently had a bunch of random failures, which occurred on creating a nova instance with 2G of RAM. According to the error
message, it seems that the hypervisor tried to allocate memory to the nova instance but couldn¡¯t find enough free memory in the host. However, by adding a few ¡°nova hypervisor-show XX¡± before, during, and right after the test, it showed that the host has 6G
of free RAM, which is far more than 2G. Here is a snapshot of the output [1]. You can find the full log here [2].<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Another observation is that most of the failure happened on a node with name ¡°devstack-trusty-ovh-*¡± (You can verify it by entering a query [3] at
<a href="http://logstash.openstack.org/">http://logstash.openstack.org/</a> ). It seems that the jobs will be fine if they are allocated to a node other than ¡°ovh¡±.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Any hints to debug this issue further? Suggestions are greatly appreciated.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">[1]
<a href="http://paste.openstack.org/show/481746/">http://paste.openstack.org/show/481746/</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">[2]
<a href="http://logs.openstack.org/48/256748/1/check/gate-functional-dsvm-magnum-swarm/56d79c3/console.html">
http://logs.openstack.org/48/256748/1/check/gate-functional-dsvm-magnum-swarm/56d79c3/console.html</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">[3]
<a href="https://review.openstack.org/#/c/254370/2/queries/1521237.yaml">https://review.openstack.org/#/c/254370/2/queries/1521237.yaml</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Best regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hongbin<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Kai Qiang Wu [mailto:wkqwu@cn.ibm.com]
<br>
<b>Sent:</b> December-09-15 7:23 AM<br>
<b>To:</b> openstack-dev@lists.openstack.org<br>
<b>Subject:</b> [openstack-dev] [Infra][nova][magnum] Jenkins failed quite often for "Cannot set up guest memory 'pc.ram': Cannot allocate memory"<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p>Hi All,<br>
<br>
I am not sure what changes these days, We found quite often now, the Jenkins failed for:<br>
<br>
<br>
<tt><span style="font-size:13.5pt"><a href="http://logs.openstack.org/07/244907/5/check/gate-functional-dsvm-magnum-k8s/5305d7a/logs/libvirt/libvirtd.txt.gz">http://logs.openstack.org/07/244907/5/check/gate-functional-dsvm-magnum-k8s/5305d7a/logs/libvirt/libvirtd.txt.gz</a></span></tt><br>
<br>
<a href="http://logs.openstack.org/07/244907/5/check/gate-functional-dsvm-magnum-k8s/5305d7a/logs/libvirt/libvirtd.txt.gz#_2015-12-09_08_52_27_892"><tt><span style="font-size:13.5pt;color:#A11F12">2015-12-09 08:52:27.892</span></tt></a><tt><span style="font-size:13.5pt">+0000:
22957: debug : qemuMonitorJSONCommandWithFd:264 : Send command '{"execute":"qmp_capabilities","id":"libvirt-1"}' for write with FD -1</span></tt><br>
<a href="http://logs.openstack.org/07/244907/5/check/gate-functional-dsvm-magnum-k8s/5305d7a/logs/libvirt/libvirtd.txt.gz#_2015-12-09_08_52_27_892"><tt><span style="font-size:13.5pt;color:#A11F12">2015-12-09 08:52:27.892</span></tt></a><tt><span style="font-size:13.5pt">+0000:
22957: debug : qemuMonitorSend:959 : QEMU_MONITOR_SEND_MSG: mon=0x7fa66400c6f0 msg={"execute":"qmp_capabilities","id":"libvirt-1"}</span></tt><br>
<tt><span style="font-size:13.5pt"> fd=-1</span></tt><br>
<a href="http://logs.openstack.org/07/244907/5/check/gate-functional-dsvm-magnum-k8s/5305d7a/logs/libvirt/libvirtd.txt.gz#_2015-12-09_08_52_27_941"><tt><span style="font-size:13.5pt;color:#A11F12">2015-12-09 08:52:27.941</span></tt></a><tt><span style="font-size:13.5pt">+0000:
22951: debug : virNetlinkEventCallback:347 : dispatching to max 0 clients, called from event watch 6</span></tt><br>
<a href="http://logs.openstack.org/07/244907/5/check/gate-functional-dsvm-magnum-k8s/5305d7a/logs/libvirt/libvirtd.txt.gz#_2015-12-09_08_52_27_941"><tt><span style="font-size:13.5pt;color:#A11F12">2015-12-09 08:52:27.941</span></tt></a><tt><span style="font-size:13.5pt">+0000:
22951: debug : virNetlinkEventCallback:360 : event not handled.</span></tt><br>
<a href="http://logs.openstack.org/07/244907/5/check/gate-functional-dsvm-magnum-k8s/5305d7a/logs/libvirt/libvirtd.txt.gz#_2015-12-09_08_52_27_941"><tt><span style="font-size:13.5pt;color:#A11F12">2015-12-09 08:52:27.941</span></tt></a><tt><span style="font-size:13.5pt">+0000:
22951: debug : virNetlinkEventCallback:347 : dispatching to max 0 clients, called from event watch 6</span></tt><br>
<a href="http://logs.openstack.org/07/244907/5/check/gate-functional-dsvm-magnum-k8s/5305d7a/logs/libvirt/libvirtd.txt.gz#_2015-12-09_08_52_27_941"><tt><span style="font-size:13.5pt;color:#A11F12">2015-12-09 08:52:27.941</span></tt></a><tt><span style="font-size:13.5pt">+0000:
22951: debug : virNetlinkEventCallback:360 : event not handled.</span></tt><br>
<a href="http://logs.openstack.org/07/244907/5/check/gate-functional-dsvm-magnum-k8s/5305d7a/logs/libvirt/libvirtd.txt.gz#_2015-12-09_08_52_27_941"><tt><span style="font-size:13.5pt;color:#A11F12">2015-12-09 08:52:27.941</span></tt></a><tt><span style="font-size:13.5pt">+0000:
22951: debug : virNetlinkEventCallback:347 : dispatching to max 0 clients, called from event watch 6</span></tt><br>
<a href="http://logs.openstack.org/07/244907/5/check/gate-functional-dsvm-magnum-k8s/5305d7a/logs/libvirt/libvirtd.txt.gz#_2015-12-09_08_52_27_941"><tt><span style="font-size:13.5pt;color:#A11F12">2015-12-09 08:52:27.941</span></tt></a><tt><span style="font-size:13.5pt">+0000:
22951: debug : virNetlinkEventCallback:360 : event not handled.</span></tt><br>
<a href="http://logs.openstack.org/07/244907/5/check/gate-functional-dsvm-magnum-k8s/5305d7a/logs/libvirt/libvirtd.txt.gz#_2015-12-09_08_52_28_070"><tt><span style="font-size:13.5pt;color:#A11F12">2015-12-09 08:52:28.070</span></tt></a><tt><span style="font-size:13.5pt">+0000:
22951: error : qemuMonitorIORead:554 : Unable to read from monitor: Connection reset by peer</span></tt><br>
<a href="http://logs.openstack.org/07/244907/5/check/gate-functional-dsvm-magnum-k8s/5305d7a/logs/libvirt/libvirtd.txt.gz#_2015-12-09_08_52_28_070"><tt><span style="font-size:13.5pt;color:#A11F12">2015-12-09 08:52:28.070</span></tt></a><tt><span style="font-size:13.5pt">+0000:
22951: error : qemuMonitorIO:690 : internal error: early end of file from monitor: possible problem:</span></tt><br>
<tt><span style="font-size:13.5pt">Cannot set up guest memory 'pc.ram': Cannot allocate memory</span></tt><br>
<br>
<br>
<br>
<br>
<span style="font-size:13.5pt;color:#0020C2">It not hit such resource issue before. I am not sure if Infra or nova guys know about it ?
</span><br>
<br>
<br>
Thanks<br>
<br>
Best Wishes,<br>
--------------------------------------------------------------------------------<br>
Kai Qiang Wu (<span lang="ZH-CN">Î⿪ǿ</span> Kennan<span lang="ZH-CN">£©</span><br>
IBM China System and Technology Lab, Beijing<br>
<br>
E-mail: <a href="mailto:wkqwu@cn.ibm.com">wkqwu@cn.ibm.com</a><br>
Tel: 86-10-82451647<br>
Address: Building 28(Ring Building), ZhongGuanCun Software Park, <br>
No.8 Dong Bei Wang West Road, Haidian District Beijing P.R.China 100193<br>
--------------------------------------------------------------------------------<br>
Follow your heart. You are miracle! <o:p></o:p></p>
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