Matthew Tice
2008-Jul-24 18:40 UTC
[Xen-users] Dom0 crashes when serving java content on DomU
Hello, we''re dealing with a very odd problem related to system
crashes.
I have a Dom0 machine running OpenSuse 10.3 64bit with 128G ram. One of the
DomU''s is SLES9 serving java-based web content. The problem is that
when I
try to pull a web page from the DomU the Dom0 crashes. The only way to
bring it back up is with a hard reboot.
I''ve enabled various boot options to try to debug but I''m not
getting any
pertinent output. On the Dom0 I configured the following options:
sync_console
loglvl=debug
guest_loglvl=debug
nmi=fatal
apic_verbosity=debug
I also redirected the kernel syslog-ng facility to log to a file (instead of
console). I don''t get any info printed anywhere (console or log).
An interesting side note is that I have another webserver that just serves
static content also running SLES 9 and I don''t have problems with that
node.
To recap the system specs:
Dom0:
# cat /etc/SuSE-release
openSUSE 10.3 (X86-64)
VERSION = 10.3
# uname -a
Linux om-vm02 2.6.22.18-203-xen #1 SMP 2008-07-10 18:20:51 +0200 x86_64
x86_64 x86_64 GNU/Linux
# free -m
total used free shared buffers cached
Mem: 129243 2748 126494 0 40 59
-/+ buffers/cache: 2649 126594
Swap: 2055 0 2055
Four quad-core Xeon processors
DomU:
Running Sles 9,3
Any help would be greatly appreciated
Matt
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Ross S. W. Walker
2008-Jul-24 18:46 UTC
RE: [Xen-users] Dom0 crashes when serving java content on DomU
Matthew Tice wrote:> Hello, we''re dealing with a very odd problem related to system crashes. > I have a Dom0 machine running OpenSuse 10.3 64bit with 128G > ram. One of the DomU''s is SLES9 serving java-based web > content. The problem is that when I try to pull a web page > from the DomU the Dom0 crashes. The only way to bring it > back up is with a hard reboot. > > I''ve enabled various boot options to try to debug but I''m not > getting any pertinent output. On the Dom0 I configured the > following options: > sync_console > loglvl=debug > guest_loglvl=debug > nmi=fatal > apic_verbosity=debug > > I also redirected the kernel syslog-ng facility to log to a > file (instead of console). I don''t get any info printed > anywhere (console or log). > > An interesting side note is that I have another webserver > that just serves static content also running SLES 9 and I > don''t have problems with that node. > > To recap the system specs: > Dom0: > > # cat /etc/SuSE-release > openSUSE 10.3 (X86-64) > VERSION = 10.3 > > # uname -a > Linux om-vm02 2.6.22.18-203-xen #1 SMP 2008-07-10 18:20:51 > +0200 x86_64 x86_64 x86_64 GNU/Linux > > # free -m > total used free shared > buffers cached > Mem: 129243 2748 126494 0 > 40 59 > -/+ buffers/cache: 2649 126594 > Swap: 2055 0 2055 > > Four quad-core Xeon processors > > DomU: > Running Sles 9,3 > > Any help would be greatly appreciatedTake a look at your network drivers first. It sounds like there may be a problem with their configuration. Make sure you are running the latest drivers. Disable any proprietary TCP off-loading. -Ross ______________________________________________________________________ This e-mail, and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution or copying of this e-mail, and any attachments thereto, is strictly prohibited. If you have received this e-mail in error, please immediately notify the sender and permanently delete the original and any copy or printout thereof. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Matthew Tice
2008-Jul-25 14:22 UTC
Re: [Xen-users] Dom0 crashes when serving java content on DomU
Ross, I removed the TOE rj11 device from the mother board but it didn''t seem to correct the problem. Todd, Jvm max heap size is 1GB. Memory for the domU is 1.5GB We''re sing an apache/tomcat configuration with mod_jk to pass request to tomcat and apache serving static content. Any other ideas? This is a very odd problem indeed. Thanks, Matt On Thu, Jul 24, 2008 at 1:07 PM, Todd H. Foster <toddf@technetiuminc.com>wrote:> What version of JVM and what app server? > How much memory in the VM and heap? > Have you tried to serve up a static jsp? > > I do this all the time and have no problems. > > Thanks, > > Todd > > -----Original Message----- > From: xen-users-bounces@lists.xensource.com > [mailto:xen-users-bounces@lists.xensource.com] On Behalf Of Ross S. W. > Walker > Sent: Thursday, July 24, 2008 11:46 AM > To: Matthew Tice; xen-users@lists.xensource.com > Subject: RE: [Xen-users] Dom0 crashes when serving java content on DomU > > Matthew Tice wrote: > > > Hello, we''re dealing with a very odd problem related to system > crashes. > > I have a Dom0 machine running OpenSuse 10.3 64bit with 128G > > ram. One of the DomU''s is SLES9 serving java-based web > > content. The problem is that when I try to pull a web page > > from the DomU the Dom0 crashes. The only way to bring it > > back up is with a hard reboot. > > > > I''ve enabled various boot options to try to debug but I''m not > > getting any pertinent output. On the Dom0 I configured the > > following options: > > sync_console > > loglvl=debug > > guest_loglvl=debug > > nmi=fatal > > apic_verbosity=debug > > > > I also redirected the kernel syslog-ng facility to log to a > > file (instead of console). I don''t get any info printed > > anywhere (console or log). > > > > An interesting side note is that I have another webserver > > that just serves static content also running SLES 9 and I > > don''t have problems with that node. > > > > To recap the system specs: > > Dom0: > > > > # cat /etc/SuSE-release > > openSUSE 10.3 (X86-64) > > VERSION = 10.3 > > > > # uname -a > > Linux om-vm02 2.6.22.18-203-xen #1 SMP 2008-07-10 18:20:51 > > +0200 x86_64 x86_64 x86_64 GNU/Linux > > > > # free -m > > total used free shared > > buffers cached > > Mem: 129243 2748 126494 0 > > 40 59 > > -/+ buffers/cache: 2649 126594 > > Swap: 2055 0 2055 > > > > Four quad-core Xeon processors > > > > DomU: > > Running Sles 9,3 > > > > Any help would be greatly appreciated > > Take a look at your network drivers first. It sounds like there > may be a problem with their configuration. > > Make sure you are running the latest drivers. Disable any > proprietary TCP off-loading. > > -Ross > > ______________________________________________________________________ > This e-mail, and any attachments thereto, is intended only for use by > the addressee(s) named herein and may contain legally privileged > and/or confidential information. If you are not the intended recipient > of this e-mail, you are hereby notified that any dissemination, > distribution or copying of this e-mail, and any attachments thereto, > is strictly prohibited. If you have received this e-mail in error, > please immediately notify the sender and permanently delete the > original and any copy or printout thereof. > > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Matthew Tice
2008-Jul-25 20:20 UTC
Re: [Xen-users] Dom0 crashes when serving java content on DomU
On Fri, Jul 25, 2008 at 8:22 AM, Matthew Tice <mjtice@gmail.com> wrote:> Ross, > > I removed the TOE rj11 device from the mother board but it didn''t seem to > correct the problem. > > Todd, > > Jvm max heap size is 1GB. Memory for the domU is 1.5GB > > We''re sing an apache/tomcat configuration with mod_jk to pass request to > tomcat and apache serving static content. > Any other ideas? This is a very odd problem indeed. > > Thanks, > Matt > >Well I''ve narrowed this issue down slightly. When we hit the machine directly I don''t have any problems. When the request goes through my Netscaler load balancer both Dom0 and DomU crash. Anyone seen anything like this before? Matt _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users