My first guess would be fencing.<div id="yMail_cursorElementTracker_1612588685445">Fencing kicks in when there are network issues or when the Hypervisor is stuck.</div><div id="yMail_cursorElementTracker_1612588773193"><br></div><div id="yMail_cursorElementTracker_1612588773409">Check the engine's logs to verify that guess.</div><div id="yMail_cursorElementTracker_1612588803333"><br></div><div id="yMail_cursorElementTracker_1612588803551">Best Regards,</div><div id="yMail_cursorElementTracker_1612588810190">Strahil Nikolov<br><br><div id="ymail_android_signature"><a id="ymail_android_signature_link" href="https://go.onelink.me/107872968?pid=InProduct&amp;c=Global_Internal_YGrowth_AndroidEmailSig__AndroidUsers&amp;af_wl=ym&amp;af_sub1=Internal&amp;af_sub2=Global_YGrowth&amp;af_sub3=EmailSignature">Sent from Yahoo Mail on Android</a></div> <br> <blockquote style="margin: 0 0 20px 0;"> <div style="font-family:Roboto, sans-serif; color:#6D00F6;"> <div>On Fri, Feb 5, 2021 at 11:50, francesco--- via Users</div><div>&lt;users@ovirt.org&gt; wrote:</div> </div> <div style="padding: 10px 0 0 20px; margin: 10px 0 0 0; border-left: 1px solid #6D00F6;"> <div dir="ltr">Hi all,<br></div><div dir="ltr"><br></div><div dir="ltr">I'm experiencing random reboot on several oVirt nodes (CentOS 7/8, oVirt 4.3/4.4 as well). Sometimes it happens three times in a day, and the more hosts I'm adding to my pool, the more I noticing.<br></div><div dir="ltr"><br></div><div dir="ltr">The logs are not helpful: it's like a brute poweroff cause there are no entries at all in the messages, vdsm, secure (I looked all over the logs) from the last "normal" entry (user logged in/off, normal vdsm log ecc.) until the first entry of the boot. kdump is enabled and /var/crash is empty. I used to run Xen on the servers of the same provider and I didn't have all of these frequent reboots, that's why I'm not sure it is a hardware related issue.<br></div><div dir="ltr"><br></div><div dir="ltr">Any advice on what enables for getting more info about this crash?<br></div><div dir="ltr"><br></div><div dir="ltr">Thank you for your time,<br></div><div dir="ltr">Francesco<br></div><div dir="ltr">_______________________________________________<br></div><div dir="ltr">Users mailing list -- <a ymailto="mailto:users@ovirt.org" href="mailto:users@ovirt.org">users@ovirt.org</a><br></div><div dir="ltr">To unsubscribe send an email to <a ymailto="mailto:users-leave@ovirt.org" href="mailto:users-leave@ovirt.org">users-leave@ovirt.org</a><br></div><div dir="ltr">Privacy Statement: <a href="https://www.ovirt.org/privacy-policy.html" target="_blank">https://www.ovirt.org/privacy-policy.html</a><br></div><div dir="ltr">oVirt Code of Conduct: <a href="https://www.ovirt.org/community/about/community-guidelines/" target="_blank">https://www.ovirt.org/community/about/community-guidelines/</a><br></div><div dir="ltr">List Archives: <a href="https://lists.ovirt.org/archives/list/users@ovirt.org/message/G3DOP7A7SREBYQ5IY24HBE4GYCKM6QH7/" target="_blank">https://lists.ovirt.org/archives/list/users@ovirt.org/message/G3DOP7A7SREBYQ5IY24HBE4GYCKM6QH7/</a><br></div> </div> </blockquote></div>