Hello,
Today my server stopped responding. i went to the console and on the screen there were a continuous loop of the following info shown on the screen:
BUG: soft lockup - CPU#0 stuck for 10s! [java:13959]
and alot of other information. ii've took a screen shot of the info shown , you can find it under the following url: http://img585.imageshack.us/i/img00012201103070833.jpg/ and had to hard reset for it to be back up and running.
i tried googling with no luck for direct relevant info. so hoping you can help out
Thanks,
--Roland
Am 07.03.2011 08:31, schrieb Roland RoLaNd:
Hello,
Today my server stopped responding. i went to the console and on the screen there were a continuous loop of the following info shown on the screen:
BUG: soft lockup - CPU#0 stuck for 10s! [java:13959]
and alot of other information. ii've took a screen shot of the info shown , you can find it under the following url: http://img585.imageshack.us/i/img00012201103070833.jpg/ and had to hard reset for it to be back up and running.
i tried googling with no luck for direct relevant info. so hoping you can help out
Thanks,
--Roland
A good reason why to run CentOS 5.4 (at least its kernel)?
Running remotely vulnerable Oracle Java which can be affected by a DoS throug a web application?
Alexander
On Mon, 07 Mar 2011 09:31:42 +0200 Roland RoLaNd wrote:
BUG: soft lockup - CPU#0 stuck for 10s! [java:13959]
i tried googling with no luck for direct relevant info.
The first google result for the above string takes me here:
http://bugs.centos.org/view.php?id=3582
Which in turn contains a reference that takes me here:
https://bugzilla.redhat.com/show_bug.cgi?id=484590
And it appears that this issue was fixed with kernel version 2.6.18-164.
Am 07.03.2011 08:46, schrieb Frank Cox:
On Mon, 07 Mar 2011 09:31:42 +0200 Roland RoLaNd wrote:
BUG: soft lockup - CPU#0 stuck for 10s! [java:13959]
i tried googling with no luck for direct relevant info.
The first google result for the above string takes me here:
http://bugs.centos.org/view.php?id=3582
Which in turn contains a reference that takes me here:
https://bugzilla.redhat.com/show_bug.cgi?id=484590
And it appears that this issue was fixed with kernel version 2.6.18-164.
Roland's screencopy shows a java process rather than openswan.
Alexander
2011/3/7 Alexander Dalloz ad+lists@uni-x.org:
Am 07.03.2011 08:46, schrieb Frank Cox:
Roland's screencopy shows a java process rather than openswan.
indeed, could it be http://www.iss.net/threats/414.html DoS? I would not expect that this is happening in the kernel, though...
well i'm already running that kernel version. i've upgraded to the latest *194*
Date: Mon, 7 Mar 2011 01:46:45 -0600 From: theatre@sasktel.net To: centos@centos.org Subject: Re: [CentOS] BUG: soft lockup CPU stuck for 10seconds (Server went down)
On Mon, 07 Mar 2011 09:31:42 +0200 Roland RoLaNd wrote:
BUG: soft lockup - CPU#0 stuck for 10s! [java:13959]
i tried googling with no luck for direct relevant info.
The first google result for the above string takes me here:
http://bugs.centos.org/view.php?id=3582
Which in turn contains a reference that takes me here:
https://bugzilla.redhat.com/show_bug.cgi?id=484590
And it appears that this issue was fixed with kernel version 2.6.18-164.
-- MELVILLE THEATRE ~ Melville Sask ~ www.melvilletheatre.com www.creekfm.com - FIFTY THOUSAND WATTS of POW WOW POWER! _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
----- Original Message ----- | Hello, | | Today my server stopped responding. | i went to the console and on the screen there were a continuous loop | of the following info shown on the screen: | | BUG: soft lockup - CPU#0 stuck for 10s! [java:13959] | | and alot of other information. | ii've took a screen shot of the info shown , you can find it under the | following url: http://img585.imageshack.us/i/img00012201103070833.jpg/ | and had to hard reset for it to be back up and running. | | i tried googling with no luck for direct relevant info. | so hoping you can help out | | Thanks, | | --Roland | | _______________________________________________ | CentOS mailing list | CentOS@centos.org | http://lists.centos.org/mailman/listinfo/centos
This is likely due to thread deadlock. What is the load on the machine at the time that this error occurs? I've seen this very error when running The Mathworks Distributed Computing Toolbox server. The machine would become very "unsettled" when it tried to run on more than four 2 CPUs. How many CPUs are in this system?
i couldn't connect to it to check through ssh. and when it comes to the console, i couldn't do anything either as a repetitive output as the screen shot attached keeps appearing.
this is an internal testing server with apache and mysql installed. usually the load average is 8 % max.
server's specs:
Intel Core i7-950 3.06GHz 8MB Quad Core 4.8GT/s 8 GB of RAM
it's worth mentioning that i have software raid and LVM set on it. iv'e reach online that the weekly raid schedule may cause this though i cant seem to b sure of that any advice how to check?
Date: Mon, 7 Mar 2011 09:24:16 -0800 From: jpeltier@sfu.ca To: centos@centos.org Subject: Re: [CentOS] BUG: soft lockup CPU stuck for 10seconds (Server went down)
----- Original Message ----- | Hello, | | Today my server stopped responding. | i went to the console and on the screen there were a continuous loop | of the following info shown on the screen: | | BUG: soft lockup - CPU#0 stuck for 10s! [java:13959] | | and alot of other information. | ii've took a screen shot of the info shown , you can find it under the | following url: http://img585.imageshack.us/i/img00012201103070833.jpg/ | and had to hard reset for it to be back up and running. | | i tried googling with no luck for direct relevant info. | so hoping you can help out | | Thanks, | | --Roland | | _______________________________________________ | CentOS mailing list | CentOS@centos.org | http://lists.centos.org/mailman/listinfo/centos
This is likely due to thread deadlock. What is the load on the machine at the time that this error occurs? I've seen this very error when running The Mathworks Distributed Computing Toolbox server. The machine would become very "unsettled" when it tried to run on more than four 2 CPUs. How many CPUs are in this system?
-- James A. Peltier IT Services - Research Computing Group Simon Fraser University - Burnaby Campus Phone : 778-782-6573 Fax : 778-782-3045 E-Mail : jpeltier@sfu.ca Website : http://www.sfu.ca/itservices http://blogs.sfu.ca/people/jpeltier
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
On 07/03/11 08:31, Roland RoLaNd wrote:
Hello,
Today my server stopped responding. i went to the console and on the screen there were a continuous loop of the following info shown on the screen:
BUG: soft lockup - CPU#0 stuck for 10s! [java:13959]
and alot of other information. ii've took a screen shot of the info shown , you can find it under the following url: http://img585.imageshack.us/i/img00012201103070833.jpg/ and had to hard reset for it to be back up and running.
i tried googling with no luck for direct relevant info. so hoping you can help out
Some real kernel developers might have better insight on why this happens. But this hits APIC timers during a syscall. I would probably try to boot the box with 'noapic' in the kernel command line, to see if this improves things or not.
Do you see the "soft lockup - CPU#0" always? or does it also happen to other CPUs as well? And if it does, is the java process running on more CPUs?
kind regards,
David Sommerseth
-
Alexander Dalloz -
Alexander Georgiev -
David Sommerseth -
Frank Cox -
James A. Peltier -
Roland RoLaNd