Re: [Xen-users] Dom0 crashes when serving java content on DomU

["Matthew Tice" <mjtice@xxxxxxxxx>]

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@xxxxxxxxxxxxxxxxx> 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@xxxxxxxxxxxxxxxxxxx
[mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Ross S. W.
Walker
Sent: Thursday, July 24, 2008 11:46 AM
To: Matthew Tice; xen-users@xxxxxxxxxxxxxxxxxxx
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

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