<?xml version="1.0" encoding="UTF-8"?><rss xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:atom="http://www.w3.org/2005/Atom" version="2.0"><channel><title><![CDATA[XCP-ng host restarts at random intervals]]></title><description><![CDATA[<p dir="auto">I have an XCP-ng installation (8.2.1, all patches but most recent) which will restart at random intervals. Usually this interval is a couple months but has been as short as a week. This started just over one year ago. This server has been running since 2018 (with XCP-ng upgrades). The server is in a single host pool.</p>
<p dir="auto">This isn't a normal crash. A kernel panic does not occur. There is no indication of a shutdown. The kernel just stops then is booting a couple of seconds later.<br />
Kdump is working but there is no logging from kdump when this happens. I can force a kernel panic and I get logging by kdump when I force it so I know kdump is working.</p>
<p dir="auto">I would expect this to be a hardware issue however the hardware does not restart. The hardware remains running. The kernel will restart. I know this by monitoring hardware, kernel uptime and reviewing log data.</p>
<p dir="auto">There is no consistency in time of day or day of week. This usually occurs when the one VM on the server is idle.</p>
<p dir="auto">I'm unable to find any indication in any log that something's gone wrong. I only can find the kernel restarting.</p>
<p dir="auto">I've tried many hardware configurations, updated firmware on the system board, and RAID controller over the past year and continue to have the same results. I have re-installed XCP-ng and also have experienced the same issue through various patches applied though the past year.</p>
<p dir="auto">If there is a way that this could be caused by hardware without leaving any trace and not rebooting the hardware, I don't know what that could be but I'd be happy to hear any ideas.</p>
<p dir="auto">Does anyone have any thoughts on what I could monitor or what I might look into? The one thing I've not done is move the one VM on the host to another host. I don't suspect the VM itself is the cause because there is usually no load on the VM when the restart occurs. There are licensing entanglements which result in about 24 hours of downtime and require a re-install of software though the provider's support if I move the VM - so I've not done this for testing.</p>
]]></description><link>https://xcp-ng.org/forum/topic/5907/xcp-ng-host-restarts-at-random-intervals</link><generator>RSS for Node</generator><lastBuildDate>Tue, 14 Apr 2026 11:50:42 GMT</lastBuildDate><atom:link href="https://xcp-ng.org/forum/topic/5907.rss" rel="self" type="application/rss+xml"/><pubDate>Wed, 25 May 2022 15:27:03 GMT</pubDate><ttl>60</ttl><item><title><![CDATA[Reply to XCP-ng host restarts at random intervals on Tue, 21 Nov 2023 12:47:15 GMT]]></title><description><![CDATA[<p dir="auto"><a class="plugin-mentions-user plugin-mentions-a" href="/forum/user/toni" aria-label="Profile: Toni">@<bdi>Toni</bdi></a> said in <a href="/forum/post/67597">XCP-ng host restarts at random intervals</a>:</p>
<blockquote>
<p dir="auto">Please check whether something is connected via USB on the systems that have the reboot problem.</p>
</blockquote>
<p dir="auto">Hi! It's a community forum here <img src="https://xcp-ng.org/forum/assets/plugins/nodebb-plugin-emoji/emoji/android/1f642.png?v=0594cb2b96d" class="not-responsive emoji emoji-android emoji--slightly_smiling_face" style="height:23px;width:auto;vertical-align:middle" title=":)" alt="🙂" /> So it's a bit more up to you to demonstrate the bug by investigate a bit more and digging the logs, otherwise if you want an investigation on your setup, then pro support is more fit. If you want to take a look on what logs to check, take a look at <a href="https://docs.xcp-ng.org/troubleshooting/" target="_blank" rel="noopener noreferrer nofollow ugc">https://docs.xcp-ng.org/troubleshooting/</a></p>
]]></description><link>https://xcp-ng.org/forum/post/67606</link><guid isPermaLink="true">https://xcp-ng.org/forum/post/67606</guid><dc:creator><![CDATA[olivierlambert]]></dc:creator><pubDate>Tue, 21 Nov 2023 12:47:15 GMT</pubDate></item><item><title><![CDATA[Reply to XCP-ng host restarts at random intervals on Tue, 21 Nov 2023 04:55:51 GMT]]></title><description><![CDATA[<p dir="auto">I also have the reboot problem.<br />
It only occurs for me when a USB hard drive is connected.<br />
If there is no hard drive connected to the USB interfaces, the system will run stable for months / years.</p>
<p dir="auto">Today I had to read data into a VM via USB hard drive, so I connected one.<br />
I haven't had any problems during the data transfer so far. Only when the USB hard drive is no longer used and is still connected..</p>
<p dir="auto">Please check whether something is connected via USB on the systems that have the reboot problem.</p>
<p dir="auto">I've had this problem on other systems too. But it never bothered me because I don't normally have anything connected to the USB ports.<br />
I also had the reboot problem in earlier versions of xcp-ng or Xenserver and it also occurred on HP servers that I used before I switched to Supermicro.<br />
I have been using Xenserver since version 5.0.</p>
<hr />
<p dir="auto">Mainboard: Supermicro H11SSL-i BIOS 2.4<br />
CPU: Epyc 7551P</p>
]]></description><link>https://xcp-ng.org/forum/post/67597</link><guid isPermaLink="true">https://xcp-ng.org/forum/post/67597</guid><dc:creator><![CDATA[Toni]]></dc:creator><pubDate>Tue, 21 Nov 2023 04:55:51 GMT</pubDate></item><item><title><![CDATA[Reply to XCP-ng host restarts at random intervals on Sun, 06 Aug 2023 14:40:39 GMT]]></title><description><![CDATA[<p dir="auto"><a class="plugin-mentions-user plugin-mentions-a" href="/forum/user/christopher-petzel" aria-label="Profile: christopher-petzel">@<bdi>christopher-petzel</bdi></a> Sometimes this can happen if the host and VMs do not use the same NTPP server(s) or are not syncing properly with them, and therefore fail to keep the times all properly synchronized. I'd check to make sure all are in sync.</p>
]]></description><link>https://xcp-ng.org/forum/post/64487</link><guid isPermaLink="true">https://xcp-ng.org/forum/post/64487</guid><dc:creator><![CDATA[tjkreidl]]></dc:creator><pubDate>Sun, 06 Aug 2023 14:40:39 GMT</pubDate></item><item><title><![CDATA[Reply to XCP-ng host restarts at random intervals on Sun, 06 Aug 2023 14:28:10 GMT]]></title><description><![CDATA[<p dir="auto">We have released new patches last Friday, double check to be fully up to date and reboot <img src="https://xcp-ng.org/forum/assets/plugins/nodebb-plugin-emoji/emoji/android/1f642.png?v=0594cb2b96d" class="not-responsive emoji emoji-android emoji--slightly_smiling_face" style="height:23px;width:auto;vertical-align:middle" title=":)" alt="🙂" /></p>
]]></description><link>https://xcp-ng.org/forum/post/64486</link><guid isPermaLink="true">https://xcp-ng.org/forum/post/64486</guid><dc:creator><![CDATA[olivierlambert]]></dc:creator><pubDate>Sun, 06 Aug 2023 14:28:10 GMT</pubDate></item><item><title><![CDATA[Reply to XCP-ng host restarts at random intervals on Fri, 04 Aug 2023 22:03:07 GMT]]></title><description><![CDATA[<p dir="auto"><a class="plugin-mentions-user plugin-mentions-a" href="/forum/user/danp" aria-label="Profile: Danp">@<bdi>Danp</bdi></a> said in <a href="/forum/post/64453">XCP-ng host restarts at random intervals</a>:</p>
<blockquote>
<p dir="auto"><a class="plugin-mentions-user plugin-mentions-a" href="/forum/user/chmura" aria-label="Profile: Chmura">@<bdi>Chmura</bdi></a> There's a pending fix for a problem with the zenbleed patch. You may want to test it out to see if it resolves your rebooting issue. See <a href="https://xcp-ng.org/forum/post/64436">here</a> for more details.</p>
</blockquote>
<p dir="auto">Thanks for fast reply.</p>
<p dir="auto">Now for test on serwer3 i downgrade this package:</p>
<pre><code>yum downgrade linux-firmware-20190314-5.1.xcpng8.2.noarch
</code></pre>
<p dir="auto">And I will test stability.</p>
<p dir="auto">On serwer4 i downgrade all packages to my 27.12.2022 state:</p>
<pre><code>xen-libs-4.13.4-9.28.1.xcpng8.2.x86_64
message-switch-1.23.2-3.2.xcpng8.2.x86_64
forkexecd-1.18.1-1.1.xcpng8.2.x86_64
vhd-tool-0.43.0-4.1.xcpng8.2.x86_64
1:xs-openssl-libs-1.1.1k-6.1.xcpng8.2.x86_64
xen-hypervisor-4.13.4-9.28.1.xcpng8.2.x86_64
xen-dom0-libs-4.13.4-9.28.1.xcpng8.2.x86_64
2:qemu-4.2.1-4.6.2.1.xcpng8.2.x86_64
xen-tools-4.13.4-9.28.1.xcpng8.2.x86_64
edk2-20180522git4b8552d-1.4.6.xcpng8.2.x86_64
xen-dom0-tools-4.13.4-9.28.1.xcpng8.2.x86_64
xenopsd-0.150.12-1.2.xcpng8.2.x86_64
xenopsd-xc-0.150.12-1.2.xcpng8.2.x86_64
xenopsd-cli-0.150.12-1.2.xcpng8.2.x86_64
xcp-rrdd-1.33.0-6.1.xcpng8.2.x86_64
squeezed-0.27.0-5.xcpng8.2.x86_64
rrdd-plugins-1.10.8-5.1.xcpng8.2.x86_64
gpumon-0.18.0-4.2.xcpng8.2.x86_64
xapi-tests-1.249.26-2.1.xcpng8.2.x86_64
blktap-3.37.4-1.0.1.xcpng8.2.x86_64
xapi-core-1.249.26-2.1.xcpng8.2.x86_64
2:microcode_ctl-2.1-26.xs23.xcpng8.2.x86_64
sm-rawhba-2.30.7-1.3.xcpng8.2.x86_64
rrd2csv-1.2.5-7.1.xcpng8.2.x86_64
kernel-4.19.19-7.0.15.1.xcpng8.2.x86_64
xapi-xe-1.249.26-2.1.xcpng8.2.x86_64
xcp-networkd-0.56.2-1.xcpng8.2.x86_64
openvswitch-2.5.3-2.3.12.1.xcpng8.2.x86_64
xapi-storage-script-0.34.1-2.1.xcpng8.2.x86_64
varstored-guard-0.6.2-1.xcpng8.2.x86_64
sm-2.30.7-1.3.xcpng8.2.x86_64
sm-cli-0.23.0-7.xcpng8.2.x86_64
xcp-ng-xapi-plugins-1.7.2-1.xcpng8.2.noarch
linux-firmware-20190314-5.xcpng8.2.noarch
xapi-nbd-1.11.0-3.2.xcpng8.2.x86_64
xcp-ng-pv-tools-8.2.0-11.xcpng8.2.noarch
</code></pre>
<p dir="auto">Now I will evacuate all VMs from server2 to server3/4 and check the microcode package from xcp-ng-testing repo.<br />
We'll see what comes out when i use <code>yum update "xen-*" --enablerepo=xcp-ng-testing</code><br />
Funny weekend <img src="https://xcp-ng.org/forum/assets/plugins/nodebb-plugin-emoji/emoji/android/1f642.png?v=0594cb2b96d" class="not-responsive emoji emoji-android emoji--slightly_smiling_face" style="height:23px;width:auto;vertical-align:middle" title=":)" alt="🙂" /></p>
<p dir="auto">Edit: Server3 was restarted at 9PM ;(<br />
Server 4 and update Server2 (xen-... 4.13.5-9.35.1.xcp ng 8.2) still working,</p>
]]></description><link>https://xcp-ng.org/forum/post/64454</link><guid isPermaLink="true">https://xcp-ng.org/forum/post/64454</guid><dc:creator><![CDATA[Chmura]]></dc:creator><pubDate>Fri, 04 Aug 2023 22:03:07 GMT</pubDate></item><item><title><![CDATA[Reply to XCP-ng host restarts at random intervals on Fri, 04 Aug 2023 12:44:01 GMT]]></title><description><![CDATA[<p dir="auto"><a class="plugin-mentions-user plugin-mentions-a" href="/forum/user/chmura" aria-label="Profile: Chmura">@<bdi>Chmura</bdi></a> There's a pending fix for a problem with the zenbleed patch. You may want to test it out to see if it resolves your rebooting issue. See <a href="https://xcp-ng.org/forum/post/64436">here</a> for more details.</p>
]]></description><link>https://xcp-ng.org/forum/post/64453</link><guid isPermaLink="true">https://xcp-ng.org/forum/post/64453</guid><dc:creator><![CDATA[Danp]]></dc:creator><pubDate>Fri, 04 Aug 2023 12:44:01 GMT</pubDate></item><item><title><![CDATA[Reply to XCP-ng host restarts at random intervals on Fri, 04 Aug 2023 12:30:21 GMT]]></title><description><![CDATA[<p dir="auto">Hi <a class="plugin-mentions-user plugin-mentions-a" href="/forum/user/olivierlambert" aria-label="Profile: olivierlambert">@<bdi>olivierlambert</bdi></a><br />
Now, I have the same problem on 4 servers. Machines reset every few hours!!! Please HELP.</p>
<p dir="auto">The machines have been running stably since:</p>
<pre><code>reboot system boot 4.19.0+1 Wed Dec 28 12:30 - 05:50 (217+16:19)
</code></pre>
<p dir="auto">Since then, the following patches have been installed but not restarted:</p>
<pre><code>May 16 09:07:40 Updated: xen-libs-4.13.5-9.30.3.xcpng8.2.x86_64
May 16 09:07:41 Updated: guest-templates-json-1.9.6-1.2.xcpng8.2.noarch
May 16 09:07:41 Updated: xcp-ng-release-presets-8.2.1-6.x86_64
May 16 09:07:41 Updated: xen-hypervisor-4.13.5-9.30.3.xcpng8.2.x86_64
May 16 09:07:42 Updated: xen-dom0-libs-4.13.5-9.30.3.xcpng8.2.x86_64
May 16 09:07:43 Updated: xen-tools-4.13.5-9.30.3.xcpng8.2.x86_64
May 16 09:07:44 Updated: xen-dom0-tools-4.13.5-9.30.3.xcpng8.2.x86_64
May 16 09:07:48 Updated: xcp-ng-release-config-8.2.1-6.x86_64
May 16 09:07:49 Updated: xcp-ng-release-8.2.1-6.x86_64
May 16 09:07:49 Updated: guest-templates-json-data-other-1.9.6-1.2.xcpng8.2.noarch
May 16 09:07:50 Updated: guest-templates-json-data-linux-1.9.6-1.2.xcpng8.2.noarch
May 16 09:07:50 Updated: guest-templates-json-data-windows-1.9.6-1.2.xcpng8.2.noarch
May 16 09:07:51 Updated: sudo-1.8.23-10.el7_9.3.x86_64
May 16 09:08:01 Updated: linux-firmware-20190314-5.1.xcpng8.2.noarch
May 16 09:08:03 Updated: 2:microcode_ctl-2.1-26.xs23.1.xcpng8.2.x86_64
May 29 06:57:47 Updated: xen-libs-4.13.5-9.31.1.xcpng8.2.x86_64
May 29 06:57:48 Updated: xcp-ng-release-presets-8.2.1-9.x86_64
May 29 06:57:49 Updated: message-switch-1.23.2-4.1.xcpng8.2.x86_64
May 29 06:57:50 Updated: forkexecd-1.18.1-2.1.xcpng8.2.x86_64
May 29 06:57:50 Updated: xen-hypervisor-4.13.5-9.31.1.xcpng8.2.x86_64
May 29 06:57:51 Updated: xen-dom0-libs-4.13.5-9.31.1.xcpng8.2.x86_64
May 29 06:57:56 Updated: 2:qemu-4.2.1-4.6.3.1.xcpng8.2.x86_64
May 29 06:58:00 Updated: xen-tools-4.13.5-9.31.1.xcpng8.2.x86_64
May 29 06:58:01 Updated: xen-dom0-tools-4.13.5-9.31.1.xcpng8.2.x86_64
May 29 06:58:03 Updated: xenopsd-0.150.14-1.1.xcpng8.2.x86_64
May 29 06:58:03 Updated: xenopsd-cli-0.150.14-1.1.xcpng8.2.x86_64
May 29 06:58:05 Updated: xenopsd-xc-0.150.14-1.1.xcpng8.2.x86_64
May 29 06:58:06 Updated: gpumon-0.18.0-4.3.xcpng8.2.x86_64
May 29 06:58:06 Updated: xcp-rrdd-1.33.2-1.1.xcpng8.2.x86_64
May 29 06:58:08 Updated: rrdd-plugins-1.10.8-5.2.xcpng8.2.x86_64
May 29 06:58:09 Updated: xapi-tests-1.249.28-1.2.xcpng8.2.x86_64
May 29 06:58:13 Updated: xapi-core-1.249.28-1.2.xcpng8.2.x86_64
May 29 06:58:16 Updated: sm-2.30.8-2.1.xcpng8.2.x86_64
May 29 06:58:20 Updated: xcp-ng-release-config-8.2.1-9.x86_64
May 29 06:58:21 Updated: xcp-ng-release-8.2.1-9.x86_64
May 29 06:58:22 Updated: 2:microcode_ctl-2.1-26.xs25.1.xcpng8.2.x86_64
May 29 06:58:28 Updated: linux-firmware-20190314-7.1.xcpng8.2.noarch
May 29 06:58:33 Updated: xapi-xe-1.249.28-1.2.xcpng8.2.x86_64
May 29 06:58:34 Updated: varstored-guard-0.6.2-2.xcpng8.2.x86_64
May 29 06:58:35 Updated: xcp-networkd-0.56.2-2.xcpng8.2.x86_64
May 29 06:58:36 Updated: sm-rawhba-2.30.8-2.1.xcpng8.2.x86_64
Jul 28 10:10:40 Updated: xen-libs-4.13.5-9.34.1.xcpng8.2.x86_64
Jul 28 10:10:41 Updated: xen-hypervisor-4.13.5-9.34.1.xcpng8.2.x86_64
Jul 28 10:10:42 Updated: xen-dom0-libs-4.13.5-9.34.1.xcpng8.2.x86_64
Jul 28 10:10:42 Updated: xen-tools-4.13.5-9.34.1.xcpng8.2.x86_64
Jul 28 10:10:44 Updated: xen-dom0-tools-4.13.5-9.34.1.xcpng8.2.x86_64
Jul 28 10:10:54 Updated: linux-firmware-20190314-8.1.xcpng8.2.noarch
</code></pre>
<p dir="auto">Yesterday morning  at 5:30 to 5:50 I reset the all servers (zenbleed patch), since then i have random reboots on all 4 servers.</p>
<p dir="auto">server1: 2x AMD EPYC 7282, ASUS Mainboard</p>
<pre><code>reboot   system boot  4.19.0+1         Thu Aug  3 10:57 - 13:25 (1+02:27)   
reboot   system boot  4.19.0+1         Thu Aug  3 07:33 - 13:25 (1+05:51)
reboot   system boot  4.19.0+1         Thu Aug  3 05:57 - 13:25 (1+07:27)   
reboot   system boot  4.19.0+1         Thu Aug  3 05:36 - 13:25 (1+07:48)
</code></pre>
<p dir="auto">serwer2: 2x AMD EPYC 7282, ASUS Mainboard</p>
<pre><code>reboot   system boot  4.19.0+1         Fri Aug  4 13:07 - 13:25  (00:18)    
reboot   system boot  4.19.0+1         Fri Aug  4 00:21 - 13:25  (13:04)    
reboot   system boot  4.19.0+1         Thu Aug  3 07:51 - 13:25 (1+05:34)
reboot   system boot  4.19.0+1         Thu Aug  3 05:55 - 13:25 (1+07:30)   
</code></pre>
<p dir="auto">Server3: 2x AMD EPYC 7282, Supermicro Mainboard</p>
<pre><code>reboot   system boot  4.19.0+1         Fri Aug  4 13:07 - 13:14  (00:06)    
reboot   system boot  4.19.0+1         Fri Aug  4 00:21 - 13:14  (12:53)    
reboot   system boot  4.19.0+1         Thu Aug  3 07:51 - 13:14 (1+05:23)   
reboot   system boot  4.19.0+1         Thu Aug  3 05:55 - 13:14 (1+07:19)
</code></pre>
<p dir="auto">server4: 2x AMD EPYC 7282, Supermicro Mainboard</p>
<pre><code>reboot   system boot  4.19.0+1         Fri Aug  4 00:33 - 13:26  (12:52)    
reboot   system boot  4.19.0+1         Thu Aug  3 05:46 - 13:26 (1+07:40)
</code></pre>
<p dir="auto">What can I provide you to solve the problem.</p>
<p dir="auto">Hardware issues ruled out, power supply also OK (2 power supplies, 2 independent outlets).</p>
<p dir="auto">In /var/crash i have old file</p>
<pre><code>ls -al /var/crash/
-rw-r--r--  1 root root 67108864 2022-12-28  .sacrificial-space-for-logs
</code></pre>
<p dir="auto">When one server restarted, I catch It and that was a full machine restart POST BIOS.</p>
<p dir="auto">Please help</p>
]]></description><link>https://xcp-ng.org/forum/post/64452</link><guid isPermaLink="true">https://xcp-ng.org/forum/post/64452</guid><dc:creator><![CDATA[Chmura]]></dc:creator><pubDate>Fri, 04 Aug 2023 12:30:21 GMT</pubDate></item><item><title><![CDATA[Reply to XCP-ng host restarts at random intervals on Thu, 08 Jun 2023 18:40:44 GMT]]></title><description><![CDATA[<p dir="auto">Thanks for the feedback <img src="https://xcp-ng.org/forum/assets/plugins/nodebb-plugin-emoji/emoji/android/1f642.png?v=0594cb2b96d" class="not-responsive emoji emoji-android emoji--slightly_smiling_face" style="height:23px;width:auto;vertical-align:middle" title=":)" alt="🙂" /></p>
<p dir="auto">Well, at least keep us posted if you have the same issue with another hardware, we'll be happy to help <img src="https://xcp-ng.org/forum/assets/plugins/nodebb-plugin-emoji/emoji/android/1f642.png?v=0594cb2b96d" class="not-responsive emoji emoji-android emoji--slightly_smiling_face" style="height:23px;width:auto;vertical-align:middle" title=":)" alt="🙂" /></p>
]]></description><link>https://xcp-ng.org/forum/post/63042</link><guid isPermaLink="true">https://xcp-ng.org/forum/post/63042</guid><dc:creator><![CDATA[olivierlambert]]></dc:creator><pubDate>Thu, 08 Jun 2023 18:40:44 GMT</pubDate></item><item><title><![CDATA[Reply to XCP-ng host restarts at random intervals on Thu, 08 Jun 2023 13:28:20 GMT]]></title><description><![CDATA[<p dir="auto">I believe I have the definitive cause for this 'random host reboot' issue.</p>
<p dir="auto">After 6 months of problem-free operation, I have experienced the host reboot issue again on this server. The host was running only Linux VMs, so the theory of Windows VMs on the host contributing to the reboot issue has proven false. As with each time before, there are no indications in any relevant log files that the host is going to reboot. I think at this point I can definitively say that the reboot is caused by a faulty SuperMicro motherboard.</p>
<p dir="auto">I've learned my lesson: use HPE servers! This SuperMicro system will be melted down for scrap.</p>
]]></description><link>https://xcp-ng.org/forum/post/63035</link><guid isPermaLink="true">https://xcp-ng.org/forum/post/63035</guid><dc:creator><![CDATA[christopher-petzel]]></dc:creator><pubDate>Thu, 08 Jun 2023 13:28:20 GMT</pubDate></item><item><title><![CDATA[Reply to XCP-ng host restarts at random intervals on Wed, 26 Apr 2023 20:32:45 GMT]]></title><description><![CDATA[<p dir="auto">The <code>/var/crash</code> folder might also being interesting (Dom0.log and Xen log to see who is triggering the crash)</p>
]]></description><link>https://xcp-ng.org/forum/post/61488</link><guid isPermaLink="true">https://xcp-ng.org/forum/post/61488</guid><dc:creator><![CDATA[olivierlambert]]></dc:creator><pubDate>Wed, 26 Apr 2023 20:32:45 GMT</pubDate></item><item><title><![CDATA[Reply to XCP-ng host restarts at random intervals on Wed, 26 Apr 2023 19:11:57 GMT]]></title><description><![CDATA[<p dir="auto"><a class="plugin-mentions-user plugin-mentions-a" href="/forum/user/splastunov" aria-label="Profile: splastunov">@<bdi>splastunov</bdi></a> Yes, all VMs are for in-house use and all were built by me personally.</p>
<p dir="auto">I have previously followed the same steps that you followed in your case. I updated the BIOS on the host server and moved VMs one by one.</p>
<p dir="auto">Moving VMs one by one is how I eventually found that I only had the problem when a Windows Server VM was on the host. When I had this problem occur with a fresh Windows Server 2022 VM which had no applications installed, I started to suspect that it was related to Windows. I was then able to confirm that this only occurred with Windows VMs.</p>
<p dir="auto">Thanks for the info. I think these are great steps toward finding the problem.</p>
]]></description><link>https://xcp-ng.org/forum/post/61485</link><guid isPermaLink="true">https://xcp-ng.org/forum/post/61485</guid><dc:creator><![CDATA[christopher-petzel]]></dc:creator><pubDate>Wed, 26 Apr 2023 19:11:57 GMT</pubDate></item><item><title><![CDATA[Reply to XCP-ng host restarts at random intervals on Tue, 25 Apr 2023 20:16:28 GMT]]></title><description><![CDATA[<p dir="auto">Hello!</p>
<p dir="auto">Are all VMs on this host belongs to you and you certainly know what processes running on them?</p>
<p dir="auto">I had same issue with Dell R630.<br />
The solution was to update to latest BIOS.<br />
I think that some clients ran some software that triggered some bug and host rebooted.</p>
<p dir="auto">XCP-ng security updates does not helped.<br />
In my case only BIOS update fixed suddenly crushes.</p>
<p dir="auto">So the work around will be to move VMs one by one to another host and check if it will solve the problem.</p>
]]></description><link>https://xcp-ng.org/forum/post/61449</link><guid isPermaLink="true">https://xcp-ng.org/forum/post/61449</guid><dc:creator><![CDATA[splastunov]]></dc:creator><pubDate>Tue, 25 Apr 2023 20:16:28 GMT</pubDate></item><item><title><![CDATA[Reply to XCP-ng host restarts at random intervals on Tue, 25 Apr 2023 17:46:39 GMT]]></title><description><![CDATA[<p dir="auto">Thanks for keeping us posted <img src="https://xcp-ng.org/forum/assets/plugins/nodebb-plugin-emoji/emoji/android/1f642.png?v=0594cb2b96d" class="not-responsive emoji emoji-android emoji--slightly_smiling_face" style="height:23px;width:auto;vertical-align:middle" title=":)" alt="🙂" /></p>
]]></description><link>https://xcp-ng.org/forum/post/61442</link><guid isPermaLink="true">https://xcp-ng.org/forum/post/61442</guid><dc:creator><![CDATA[olivierlambert]]></dc:creator><pubDate>Tue, 25 Apr 2023 17:46:39 GMT</pubDate></item><item><title><![CDATA[Reply to XCP-ng host restarts at random intervals on Tue, 25 Apr 2023 17:27:58 GMT]]></title><description><![CDATA[<p dir="auto">Since I last posted on this topic, I've found that the random reboots only occur when there are Windows Server VMs on the host (Tested with 2019 and 2022). The issue will not occur when running Linux VMs.</p>
<p dir="auto">My issue seems very similar to the problem described (and solved) in <a href="https://xcp-ng.org/forum/topic/6683/windows-server-2019-sporadic-reboot/7">https://xcp-ng.org/forum/topic/6683/windows-server-2019-sporadic-reboot/7</a></p>
<p dir="auto">The difference is that in my case, the host restarted and in the other post, the poster reports that the VMs are restarting. Since the poster also tested RAM and found no problems but was able to solve the issue by replacing a suspected DIMM, that information may be useful in the host reboot scenario that I experience.</p>
<p dir="auto">FYI, I have not replaced the RAM yet and may not actually do it since the server in question is aging and will likely be replaced (with HP hardware) soon.</p>
]]></description><link>https://xcp-ng.org/forum/post/61441</link><guid isPermaLink="true">https://xcp-ng.org/forum/post/61441</guid><dc:creator><![CDATA[christopher-petzel]]></dc:creator><pubDate>Tue, 25 Apr 2023 17:27:58 GMT</pubDate></item><item><title><![CDATA[Reply to XCP-ng host restarts at random intervals on Mon, 20 Jun 2022 13:45:25 GMT]]></title><description><![CDATA[<p dir="auto">I'm not entirely surprised (we tell people to use Dell or HPE). Sometimes there's a bit of lottery for Supermicro, but we also know hosting companies using SM at scale without problem…</p>
]]></description><link>https://xcp-ng.org/forum/post/50317</link><guid isPermaLink="true">https://xcp-ng.org/forum/post/50317</guid><dc:creator><![CDATA[olivierlambert]]></dc:creator><pubDate>Mon, 20 Jun 2022 13:45:25 GMT</pubDate></item><item><title><![CDATA[Reply to XCP-ng host restarts at random intervals on Mon, 20 Jun 2022 13:36:40 GMT]]></title><description><![CDATA[<p dir="auto"><a class="plugin-mentions-user plugin-mentions-a" href="/forum/user/olivierlambert" aria-label="Profile: olivierlambert">@<bdi>olivierlambert</bdi></a> Just tell people to stick with HP hardware <img src="https://xcp-ng.org/forum/assets/plugins/nodebb-plugin-emoji/emoji/android/1f604.png?v=0594cb2b96d" class="not-responsive emoji emoji-android emoji--smile" style="height:23px;width:auto;vertical-align:middle" title=":smile:" alt="😄" /> This problem server is a SuperMicro system board and it's the second of the same model of which I've had a hardware problem. The other board stopped working completely so it was a different failure mode. Once I obsolete this hardware, I will have no more SuperMicro boards in production.</p>
]]></description><link>https://xcp-ng.org/forum/post/50316</link><guid isPermaLink="true">https://xcp-ng.org/forum/post/50316</guid><dc:creator><![CDATA[christopher-petzel]]></dc:creator><pubDate>Mon, 20 Jun 2022 13:36:40 GMT</pubDate></item><item><title><![CDATA[Reply to XCP-ng host restarts at random intervals on Mon, 20 Jun 2022 13:28:38 GMT]]></title><description><![CDATA[<p dir="auto">Ah "great" news then <img src="https://xcp-ng.org/forum/assets/plugins/nodebb-plugin-emoji/emoji/android/1f642.png?v=0594cb2b96d" class="not-responsive emoji emoji-android emoji--slightly_smiling_face" style="height:23px;width:auto;vertical-align:middle" title=":)" alt="🙂" /> Is there anything else we can do to help?</p>
]]></description><link>https://xcp-ng.org/forum/post/50314</link><guid isPermaLink="true">https://xcp-ng.org/forum/post/50314</guid><dc:creator><![CDATA[olivierlambert]]></dc:creator><pubDate>Mon, 20 Jun 2022 13:28:38 GMT</pubDate></item><item><title><![CDATA[Reply to XCP-ng host restarts at random intervals on Mon, 20 Jun 2022 13:18:23 GMT]]></title><description><![CDATA[<p dir="auto"><a class="plugin-mentions-user plugin-mentions-a" href="/forum/user/olivierlambert" aria-label="Profile: olivierlambert">@<bdi>olivierlambert</bdi></a> I have been able to confirm this is a hardware reboot. Since I've been working this issue for a year and the restarts were so rare, at some point I convinced myself that the hardware was not restarting even thought my monitoring and logging was telling me otherwise.</p>
<p dir="auto">Thanks for your help in guiding me to reconsider what I thought I already knew. Thankfully the restarts have become more frequent and I have had 3 reboots in 10 days. That frequency has allowed me to catch what was really happening.</p>
]]></description><link>https://xcp-ng.org/forum/post/50312</link><guid isPermaLink="true">https://xcp-ng.org/forum/post/50312</guid><dc:creator><![CDATA[christopher-petzel]]></dc:creator><pubDate>Mon, 20 Jun 2022 13:18:23 GMT</pubDate></item><item><title><![CDATA[Reply to XCP-ng host restarts at random intervals on Tue, 31 May 2022 21:55:18 GMT]]></title><description><![CDATA[<p dir="auto">I was wrong about the hypervisor, it is restarting. I confused myself and didn't make the connection.</p>
<p dir="auto">In <code>/var/log/xen/hypervisor.log...</code> I see an entry <code>Logfile Opened</code> with the timestamp of when the log rotates then I see another <code>Logfile Opened</code> at the timestamp that the hypervisor restarts, followed by the Xen log data during boot.</p>
<p dir="auto">So I guess I need to be thinking about why the hypervisor is restarting. Now I'm questioning if the hardware is restarting. I have not seen a hardware restart in the IPMI data and the recovery time seemed too short for a hardware restart HOWEVER the lack of evidence is not evidence itself so I think my next move will be to monitor the hardware in a way that I can confirm or deny a hardware restart.</p>
<p dir="auto">Thanks for your help <a class="plugin-mentions-user plugin-mentions-a" href="/forum/user/olivierlambert" aria-label="Profile: olivierlambert">@<bdi>olivierlambert</bdi></a> . It may be a couple of months before this happens again but I'll report back what I find once it happens.</p>
]]></description><link>https://xcp-ng.org/forum/post/49728</link><guid isPermaLink="true">https://xcp-ng.org/forum/post/49728</guid><dc:creator><![CDATA[christopher-petzel]]></dc:creator><pubDate>Tue, 31 May 2022 21:55:18 GMT</pubDate></item><item><title><![CDATA[Reply to XCP-ng host restarts at random intervals on Tue, 31 May 2022 21:33:20 GMT]]></title><description><![CDATA[<p dir="auto">Hmm interesting. Have you took a look on Xen side of things in terms of logs?</p>
]]></description><link>https://xcp-ng.org/forum/post/49725</link><guid isPermaLink="true">https://xcp-ng.org/forum/post/49725</guid><dc:creator><![CDATA[olivierlambert]]></dc:creator><pubDate>Tue, 31 May 2022 21:33:20 GMT</pubDate></item><item><title><![CDATA[Reply to XCP-ng host restarts at random intervals on Tue, 31 May 2022 21:31:21 GMT]]></title><description><![CDATA[<p dir="auto">I was able to run Memtest for 86 hours, completed 9 passes and had no memory errors.</p>
<p dir="auto">Maybe I'm approaching this incorrectly. I've been assuming there is a problem in dom0 since the kernel is starting without any indication as to why. What could be telling the kernel to restart? The hardware never restarts and since dom0 restarts in a very short period of time (seconds, from best I can tell), the hypervisor seems to keep running.</p>
<p dir="auto">I have a very limited knowledge of this stack so I know I could be completely wrong.</p>
]]></description><link>https://xcp-ng.org/forum/post/49724</link><guid isPermaLink="true">https://xcp-ng.org/forum/post/49724</guid><dc:creator><![CDATA[christopher-petzel]]></dc:creator><pubDate>Tue, 31 May 2022 21:31:21 GMT</pubDate></item><item><title><![CDATA[Reply to XCP-ng host restarts at random intervals on Wed, 25 May 2022 16:14:39 GMT]]></title><description><![CDATA[<p dir="auto"><a class="plugin-mentions-user plugin-mentions-a" href="/forum/user/olivierlambert" aria-label="Profile: olivierlambert">@<bdi>olivierlambert</bdi></a> Sadly, nothing showing but the restart. I'll run Memtest. I think I did this at some point but I don't have a record of doing it and it's not a bad idea anyway.</p>
]]></description><link>https://xcp-ng.org/forum/post/49546</link><guid isPermaLink="true">https://xcp-ng.org/forum/post/49546</guid><dc:creator><![CDATA[christopher-petzel]]></dc:creator><pubDate>Wed, 25 May 2022 16:14:39 GMT</pubDate></item><item><title><![CDATA[Reply to XCP-ng host restarts at random intervals on Wed, 25 May 2022 15:44:08 GMT]]></title><description><![CDATA[<p dir="auto">Hi,</p>
<p dir="auto">So I suppose there's no trace at all in <code>dmesg</code> or even <code>xl dmesg</code> (and their corresponding log files).</p>
<p dir="auto">edit: at this point, I would run memtest on that machine to be sure.</p>
]]></description><link>https://xcp-ng.org/forum/post/49536</link><guid isPermaLink="true">https://xcp-ng.org/forum/post/49536</guid><dc:creator><![CDATA[olivierlambert]]></dc:creator><pubDate>Wed, 25 May 2022 15:44:08 GMT</pubDate></item></channel></rss>