The first occurrence of this problem goes back to Feb 17th. While I keep all the VMs up to date on a daily basis, I now have doubts about the hypervisor's RAM (not ECC by the way). I brought all the VMs offline to have their FSes checked (all ext4). Several of them needed fixing by fsck. Since they are all part of a mdadm RAID1 array with 2 devices, maybe there was some bit flipping on one of the drives.
Before loosing anyone's time on this issue, I'll first make sure the hypervisor's RAM is sane. So I'll get back after some memtest86+ then I'll look at the 4.0 kernel.
The first occurrence of this problem goes back to Feb 17th. While I keep all the VMs up to date on a daily basis, I now have doubts about the hypervisor's RAM (not ECC by the way). I brought all the VMs offline to have their FSes checked (all ext4). Several of them needed fixing by fsck. Since they are all part of a mdadm RAID1 array with 2 devices, maybe there was some bit flipping on one of the drives.
Before loosing anyone's time on this issue, I'll first make sure the hypervisor's RAM is sane. So I'll get back after some memtest86+ then I'll look at the 4.0 kernel.
Thanks Joseph