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From Peter Crowther <peter.crowt...@melandra.com>
Subject Re: Tomcat dies suddenly (was JVM goes away)
Date Wed, 13 Jan 2010 17:00:34 GMT
2010/1/13 Christopher Schultz <chris@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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