This may be the same thing we are seeing on OpenStack compute nodes since upgrade. Hard crash, no output to logs, local console occasionally shows a kernel panic ending with Fatal Exception in Interrupt, shutting down CPU's.
We are seeing this reliably across 10 nodes which have been upgraded, and it doesn't happen on other nodes which are all running 3.13.0-62-generic. Have tried downgrading QEMU to 2.0, and OpenVswitch to 2.0.2-0ubuntu0.14.04.2, neither of which stop the problem happening. Hardware has also been stress tested and no memory or CPU issues. Still trying to find a reliable recreate, but seems to be connected with live migrations happening on other machines, where the node that crashes is hosting virtual instances on the same virtual networks on which the migration is happening. ** Attachment added: "Screen Shot 2016-01-21 at 05.15.02.png" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1535088/+attachment/4553994/+files/Screen%20Shot%202016-01-21%20at%2005.15.02.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1535088 Title: Linux Generic Kernel x -43 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1535088/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
