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8
votes
2answers
322 views

Why would a server lockup knock other servers off the network?

We have a couple dozen Proxmox servers (Proxmox runs on Debian), and about once a month, one of them will have a kernel panic and lock up. The worst part about these lock ups is that when it's a ...
7
votes
3answers
6k views

How can I see logs in a server after a kernel panic hang?

I am running a production gentoo Linux machine, and recently there was a situation where the server hung in my co-located premises and when I got there I noticed that the server was hung on what ...
7
votes
1answer
434 views

FreeNAS ZFS Kernel Panic

I'm running FreeNAS 8 and my computer had a hard reset from a power outage and now every time I try to boot I get the following error message: Error Message: panic: zfs_replay_acl_v0:898: unsupported ...
6
votes
4answers
1k views

Linux oom situation

I have continous oom&panic situation unresolved. I am not sure system fills up all the ram (36GB). Why this system triggered this oom situation? I suspect it as related to lowmem zone in 32 bit ...
4
votes
1answer
1k views

Automatic Reboot after Kernel Panic

I am currently running Ubuntu 9.04, Jaunty, and have had some issues that caused a few kernel panics to crop up. These panics cause the system to dump a bunch of information to the terminal and hang. ...
4
votes
5answers
855 views

What is the cause of this kernel panic?

I've just set up a PXE boot server on Ubuntu 14 - running kernel 3.13.0-30-generic - as it is described here https://help.ubuntu.com/community/DisklessUbuntuHowto on Supermicro X9DRFF hardware. I ...
4
votes
3answers
735 views

Compiling kernel version >= 2.6.34 on CentOS 5: RAID set “ddf1_foo” was not activated?

I want to mount a Ceph FS on some CentOS 5 servers. Since the ceph-fuse failed with below errors: # ceph-fuse --no-fuse-big-writes -m 192.168.2.15:6789 /mnt/ceph/ ceph-fuse[7528]: starting ceph ...
4
votes
2answers
661 views

How to get a kernel panic report

I have a server on datapipe clould. I am running ubuntu 12.04. My servers have been crashing in the sense that mmonit marks the server with a red dot and I cant ssh into the machine. This is due to ...
4
votes
1answer
501 views

CentOS 6.5 mdadm Raid 1 - Kernel Panic during raid data check

I have a brand new CentOS 6.5 install with two (mounted to /mnt/data) 1tb Western Digital Black drives in raid 1 with mdadm, configured via the installer. Unfortunately every now and again the entire ...
4
votes
1answer
609 views

Custom Centos5 AMI kernel panic

I'm trying to build a Custom Centos 5 AMI on Amazon and during boot it kernel panics. I've spent almost a week on it and I can't figure out what's wrong. I've followed the following recipe: ...
3
votes
3answers
2k views

Setting the timeout for HP iLO VSP in order to catch kernel panic

So i have a server that has locked up twice recently. What i want to do is catch any kernel panic/oops written to the serial console. I can ssh in and start the VSP and i'm running my SSH session in ...
3
votes
1answer
287 views

Out-of-memory kernel (3.2.0) panic (Debian 7.3) even though offending process was killed

While attempting a backup of a pretty large folder (450G) to a 2TB drive that's in that server solely as a backup destination rdiff-backup (version 1.2.8 - last marked stable) caused a kernel panic. ...
3
votes
3answers
2k views

Command to output panic/reboot history in FreeBSD

Many years ago while dealing with a FreeBSD (5.3?) box that randomly panic'ed and reboot (bad memory as it turned out), I came across a command in some forum post that when used would output ...
3
votes
2answers
3k views

Oracle Linux 6 kernel panic boot - anything I can do?

I'm running Oracle Linux 6 on a HP Proliant server. It's been running fine for the last week, but seemed slow earlier so the Oracle service was stopped. Rather than restart the service, I was asked to ...
3
votes
1answer
2k views

dirty degraded array, unable superblock, kernel panic

Machine: linux centos 5.4 with 2 hdds and raid 5 (yes, 3rd disk missing). Situation: all running fine (3rd disk missing) then a power off (system shut down itself when battery power ended). ...
3
votes
1answer
363 views

Has anyone seen this kernel panic? What to do? (Ubuntu 10.04 LTS)

The last few weeks, we've been getting this kernel panic on one machine or another out of a cluster of 15, about one every four days. The machines are all running Ubuntu 10.04 LTS with Erlang R13B03; ...
3
votes
0answers
305 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 ...
2
votes
2answers
1k views

Diagnosing Hardware Problem in Linux Server that's Kernel Panicking

We have a server that has been occasionally kernel panicking for a while now that we believe has a hardware problem. How would you go about troubleshooting hardware that you don't have physical access ...
2
votes
2answers
130 views

How to get a kernel panic count [closed]

Is there any way to check the number of kernel panic that happened on a system ? If not, any idea on how to do make this new functionality ? I would like to hear about an answer for most Unix-like ...
2
votes
5answers
545 views

Troubleshooting seemingly random G4 kernel panics and lockups

Recently my 9 year old Apple G4 file server has been randomly crashing. Often it's a kernel panic, but sometimes the system just locks up. It seems almost always to happen when I'm out of my office... ...
2
votes
3answers
1k views

ext4 in debian 5 (2.6.26)

Is ext4 ready for production usage in debian 5 (with linux kernel version 2.6.26) ? Will it be stable, oops-free and bug-free?
2
votes
1answer
107 views

Debian server locked - find_busiest_group?

Just wondering if anyone sees any clues from the following screen shot as to what might have caused this server to lock up: This server also locked up 6 months ago, and I still have the screen shot ...
2
votes
1answer
610 views

Netconsole not working

I've gotten netconsole setup on a server that's been having a variety of kernel panics lately and I'm trying to log kernel messages to another server. I've tested netconsole after setting it up on the ...
2
votes
2answers
4k views

kernel panic: Out of memory and no killable processes (SuSe on VMWare ESXi)

we have a server (ESXi virtual machine) at work that time to time gets frozen because of "kernel panic: Out of memory and no killable processes..." Host's memory is 12GB. Configuration of virtual ...
2
votes
1answer
813 views

Server hangs at “Shutting down loopback interface” on reboot

I'm having some trouble understanding what's going on with connecting one of our Xen hypervisors to our iSCSI SAN. Ever since we mounted our iSCSI targets, we've experienced hanging on reboots. This ...
2
votes
1answer
385 views

CentOS OpenVZ kernel panic when mounting ext4 truecrypt volume in nokernelcrypto mode

I am experiencing kernel panic when trying to mount a ext4 filesystem which itself resides on a truecrypt volume mounted using -m nokernelcrypto option. The system is CentOS 6.3, OpenVZ Kernel ...
2
votes
1answer
305 views

Debian Server Kernel Panic - Increasing Frequency

Server first crashed a week ago into a kernel panic and then rebooted, performed an FSCK and then came back up as normal. This then happened again this morning. Same panic, reboot, FSCK and then ...
2
votes
1answer
349 views

reboot on kernel panic and drac

Does anyone know if it is possible to have a DRAC5 make a screenshot of the console when Linux reboots (automatically) due to a kernel panic? Our current system doesn't reboot automatically when it ...
1
vote
3answers
50 views

Would the data on the RAID Card Cache and Drive Cache be lost when a kernel panic happens?

Is a BBU necessary when you have A+B power? Would the data on the RAID Card Cache and Drive Cache be lost when a kernel panic happens and you are forced to do a cold reset?
1
vote
2answers
41 views

Oops in syslog and freeze the server with docker

I've got following exceptions after my server freezes and reboot for 2 times I cannot tell the relevant with docker, but it happends every time I started some containers and I cannot find any useful ...
1
vote
3answers
926 views

Ext4 kernel panic

I'm getting such kernel panics: EXT4-fs error (device md2): ext4_ext_find_extent: bad header/extent in inode #97911179: invalid magic - magic 5f69, entries 28769, max 26988(0), depth 24939(0) ...
1
vote
1answer
1k views

md/raid:md2: cannot start dirty degraded array, kernel panic

After having made use of a remote power switch, my server did not come back online. When I went to the datacenter and reboot the computer on the spot I see the server booting (I see the centos ...
1
vote
2answers
498 views

New kernel compilation on CentOS

I'm trying to compile and install kernel 3.2.9 for CentOS 5.6. I compiled new kernel and installed kernel modules: make && make modules_install I also created new initrd image: mkinitrd ...
1
vote
2answers
339 views

Issues debugging a kernel panic (custom kernel)

I'm looking to compile a custom kernel from the official source tree (kernel.org). The machine itself runs the latest stable RHEL kernel without issues but I can't seem to figure out why it's ...
1
vote
2answers
830 views

kernel panic messages to another file

Is there a way to get kernel panic information to log to either the local machine via a log file (I'm assuming possibly no, since it's panic'd) or would I have to enable remote syslog or netdump to ...
1
vote
1answer
766 views

Debian Lenny syslog kernel messages

I've recently got a hard drive swap on my colo'd box. I reinstalled Debian Lenny on the new drive and setup everything. Recently I've been getting these messages from the kernel (viewed on the ...
1
vote
1answer
399 views

Kernel Panic after Installation Issues with Ubuntu 10.04.3 LTS

Update 2 The installation from Update 1 was successful. Update 1 Just removed RAID10 from all six drives, and RAID10 configured only the first four devices. After doing so, the installation was ...
1
vote
2answers
2k views

What can cause a kernel hang on redhat 4?

I've to solve a nasty problem on a ten machine "cluster": randomly one of these machine hang during an hard computation, sometime still ping sometime not. The problem was described me at the phone, ...
1
vote
3answers
1k views

Kernel Panic with gentoo boot (root partition not found)

Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(1,0) grub.conf default 0 timeout 30 splashimage=(hd0,0)/boot/grub/splash.xpm.gz title Gentoo Linux 2.6.34-r6 root (hd0,0) ...
1
vote
2answers
2k views

How should I capture Linux kernel panic stack traces?

What's current best practice to capture full kernel stack traces on a Linux system (RHEL 5.x, kernel 2.6.18) that occasionally panics in a device driver? I'm used to the "old" SunOS way of doing ...
1
vote
0answers
21 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
1answer
142 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 ...
1
vote
0answers
399 views

Migrate CentOS VM using LVM on IDE to run with VirtIO

I'm trying to migrate existing IDE-using, LVM-based CentOS 5.2 VMs to use virtio. The symptom is a kernel panic upon boot when the system can't find any volume groups. Does anyone know how to make ...
1
vote
0answers
166 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
472 views

Kernel Panic - not syncing: VFS: Unable to mount root fs on unknown-bloc(8,2)

I am a spanish speaker so excuse me for my bad english. I am learning how to compile slackware kernel, so I have downloaded linux-3.2.7.tar.bz2 from http://www.kernel.org Conditions: Slackware ...
1
vote
0answers
179 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 ...
1
vote
4answers
514 views

IBM X3650 with Red Hat Enterprise 4.8 kernel panics with error on empty memory bank

I have 3 IBM X3650 load balanced (round robin) with Red Hat Enterprise 4.8. One of them has intermittent kernel panics and reports an error on 2 particular memory banks (3 and 5) which are empty. I ...
0
votes
1answer
472 views

web server “task blocked for more than 120 seconds”

my web server is down every 2 days. it became unresponsive and I can only see the message below on the console. task **** blocked for more than 120 seconds. The only way to bring it up is resetting ...
0
votes
2answers
206 views

Dell PowerEdge 1950 strange reboot

I have Dell PowerEdge 1950 with debian which reboot without reason, and after reboot BIOS write that "previous shutdown was with error press f1 for continue". First of all, is it possible switch of ...
0
votes
1answer
204 views

How to log kernel panics without KVM

My server is crashing and I can't find an answer why. It all started after my datacenter upgrade RAM from 16 GB to 32 GB. I also found such logs in dmesg - they've started to show itself just before ...