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6
votes
1answer
890 views

Failing to mount root from ramdisk while PXE boot

I have a working TFTP/DHCP PXE boot environment where I've already booted some images successful. Now I built an CentOS 6.5 diskless image and this one is failing booting with the following error: No ...
3
votes
1answer
932 views

FreeBSD 10.1 how to autoreboot on kernel panic

Recently I installed FreeBSD 10.1 on machine that for years was working fine with FreeBSD 6.2. Since machine is located in datacenter I configured remote access via serial console. After installation ...
1
vote
1answer
187 views

Server crashes with “huge task timeout”

First things first, I've read a lot about the "huge task timeout" kernel panic and know that this often happens if the server is out of resources. Error messages which appear only in the VNC console ...
1
vote
1answer
227 views

kvm hypervisor kernel panic

My kvm hypervisor had been running with 20+ vps guests for a few months. But a few days ago it went to kernel panic. There were no abnormal operation that I found would cause the problem, except that ...
0
votes
1answer
131 views

Kernel panic - not syncing: BRKADRINT

One of the machines on the network started beeping continuously and was unresponsive locally as well over the network. We shut it down keeping power pressed. Upon reboot, the boot stopped with Kernel ...
3
votes
0answers
283 views

'BUG: unable to handle kernel NULL pointer dereference at' on Google Compute Engine

On a semi-regular basis, I've seen GCE instances freezing with the following error message (from the serial console): g[1375589.784755] BUG: unable to handle kernel NULL pointer dereference at ...
2
votes
0answers
64 views

Kernel Crash - kernel: BUG: unable to handle kernel paging request at 00000000ff8179b9

One of my Oracle Linux 6.5 Server running Oracle ASM/GRID experienced a kernel crash, it didn't respond i have performed a hard reboot. Server is Oracle Linux 6.5, kernel 2.6.39-400.214.3.el6uek....
2
votes
0answers
42 views

How to reliably capture Linux kernel log messages in case of a system debilitating crash (BUG, panic)?

I'd like to have access to the lines/tracebacks/whatever whispered by the kernel right before dying. This has proven problematic, because all interfaces I have access to become disabled. Post-reboot, ...
2
votes
0answers
73 views

After Upgrading to Ubuntu 15.10 from 15.04, EC2 Webservers are Crashing

I have a variety of Ubuntu machines on EC2 running in production, with about 30 that were upgraded from 15.04 to 15.10. With most of the machines, the upgrade went flawlessly and experienced no issues ...
1
vote
0answers
73 views

XenServer 6.2 - could not find filesystem '/dev/root'

We have a Citrix Xenserver 6.2 install. Today we had an incident where power to the server was suddenly cut off from the server. It had been running for quite some time without issue. It has quite a ...
1
vote
0answers
23 views

BSOD BugCheck on Multi-core system - What thread caused the crash?

I am aware that a Windows' system will crash with a stop error and "blue screen" for a few common reasons, some of which may be: A device driver or OS function that runs in kernel-mode space ...
1
vote
0answers
138 views

Auto-Reboot on Kernel BUG (not tainted, “fixing recursive fault but reboot is needed”)

I'm running a sometimes highly loaded Debian 7 VM with the latest 3.2.x kernel on a XenServer 6.2 host. Sometimes this VM runs into the following state: Ping is okay, All Services unreachable (...
1
vote
0answers
39 views

RAID5 needs drive to be added every reboot

I have a 3 disk RAID5 mdadm array total 4TB on an Ubuntu Server 14.04.3 LTS. Since a kernel panic caused by a device unrelated to the array and that has been already replaced, after every reboot the ...
1
vote
0answers
103 views

CoreOS Random Reboot Kernel Panic with Obscure Message - How to debug?

I'm relatively new to the CoreOS world, we had a server reboot and the messaging in the Journal is extremely vague: Sep 18 07:10:27 ip-x-x-x-x.us-west-2.compute.internal kernel: BUG: unable to handle ...
1
vote
0answers
87 views

Server crashes because of SMP

My web server is crashing every few days unless I disable SMP with "nosmp" parameter in Grub config. It is not an hardware failure because the problem persists after moving everything to a new machine....
1
vote
0answers
428 views

Copying from NFS mount crashes Linux client machine

I have NFS share mounted on CLIENT in /etc/fstab: SERVER:/share on /mnt/share type nfs (rw,users,noexec,nosuid,nodev,timeo=14,hard,intr,addr=1.2.3.4) Intensive use on client like copying a lot of ...
1
vote
0answers
257 views

OpenStack compute nodes kernel panic

I'm fairly new to the OpenStack world and have been working on getting our first cluster up and running. I've primarily been using this document http://wiki.debian.org/OpenStackPuppetHowto among ...
1
vote
0answers
238 views

Corrupted Kernel Output via Serial Connection

I have a server that Kernel Panics every once in a while, and I'm trying to get all of the output in order to debug it further. It is running RedHat 4, so the kernel version is only 2.6.9, too old ...
0
votes
0answers
17 views

kernel: OUT setsockopt exception observed in syslogs

We are facing the issue of sudden reboot of the machine. There are no errors in the iLO logs. We are observing below exception repeatedly in the syslog, which I am unable understand. kernel: ###OUT ...
0
votes
0answers
160 views

Got kernel panic with 3w-sas driver after kernel update

I use CentOS 6.7 and I've got kernel panic related to LSI 3ware 9750-4i Controller after kernel update from 2.6.32-431.17.1.el6.x86_64 to 2.6.32-573.12.1.el6.x86_64. It is minor update, so I think it ...
0
votes
0answers
39 views

X9SRL-F Crashing Ubuntu

We are running a KVM server node on Ubuntu 14.04.3 LTS with some VMs for a while now. About 3 months ago we noticed a random crash at night without any crashdata, the system seemed to be frozen back ...
0
votes
0answers
327 views

task nginx:4164 blocked for more than 120 seconds

My server was working fine for 173 days then it started to happen. Upgrading CentOS 6.6 kernel to latest one didn't helped. Rebooting helps for about 10 minutes then it starts all over again. I'm ...
0
votes
0answers
452 views

how to turn a rescue kernel into a working one?

A yum update today made one of my CentOS 7 servers unusable: there is kernel panic as soon as the boot starts. I tried to start previous kernels from GRUB but all of them crash the same way. I even ...
0
votes
0answers
799 views

Server crash : “unable to handle kernel paging request”

My fresh new Ubuntu webserver randomly crashes with the following error in the syslog. It doesn't respond anymore and I have to do a hard reboot. It happens almost one time a day. Server kernel is : ...
0
votes
0answers
302 views

Java causing kernel panic

I'm running quite a lot of computations on Ubuntu 12.04 (3.8.0-35-generic), application is written in Java (Oracle 1.7.0_45-b18) on a server which has 12 AMD cores. Typically the computations uses 10 ...
0
votes
0answers
67 views

FreeIPA issue: after ipa1 server kernel panic, not switching to ipa2 failover server

Our setup is as follows. All machines are running under Centos 5.8. We have a gateway machine with a firewall, gw.example.com, through which all external traffic is funneled. Behind it we have 2 ...