Peter,

The memTest is still running but clean so far.

Thanks,

Carl

----- Original Message ----- From: "Peter Crowther" <peter.crowt...@melandra.com>
To: "Tomcat Users List" <users@tomcat.apache.org>
Sent: Wednesday, January 13, 2010 12:00 PM
Subject: Re: Tomcat dies suddenly (was JVM goes away)


2010/1/13 Christopher Schultz <ch...@christopherschultz.net>:
On 1/13/2010 8:49 AM, Peter Crowther wrote:
Very difficult to know what the problem is. One thing you can now do
(as you've switched to another production server) is to run a memory
test across the "bad" server.

Usually, I would agree that physical memory problems are likely to be a
problem, but every time I've had a physical memory problem (much more
common than I'd like to admit!), the JVM has crashed in a more classic
way: that is, with an hs_log file and almost always with a SIGSEGV,
rather than this phantom thing described by Carl.

The Linux OOM killer might be a suspect, except that the process is
apparently not dying, which is very strange.

[...]
The whole thing sounds weird. :(

Oh, I agree entirely - usually something will turn a reference bad and
you'll get a memory access somewhere off in hyperspace during a GC.
But it's an easy thing to check, and there is an (admittedly small)
possibility of seeing these symptoms.  Heck, with hardware errors
there's a small probability of seeing pretty much *any* symptoms.

- Peter

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