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From "Carl" <c...@etrak-plus.com>
Subject Re: Tomcat dies suddenly
Date Fri, 12 Feb 2010 16:31:19 GMT
Chris,

Thanks for your response.

I'll try to find a memtest for 64 bit.

On the 32 bit topic.  I have run successfully for several years on a 
Slackware 12.1 32 bit system (Java 1.5 something, Tomcat 5.5.25.)  When I 
brought up Slackware 13.0 32 bit, and the latest Tomcat and Java (32 bit, of 
course), it suffered from the same problem which surprised me.  Also, one of 
the reasons for going to 64 bit was that we have had problems when some 
people were running B, C and D (permGen, very clear) so I was trying to get 
a little extra memory.

No, we are not doing remote logging (the servers are 10' away from me.)

Me stumped also... has always been so simple to set up a Tomcat server.

Do I gain anything by trying Glassfish?

Thanks,

Carl

----- Original Message ----- 
From: "Christopher Schultz" <chris@christopherschultz.net>
To: "Tomcat Users List" <users@tomcat.apache.org>
Sent: Friday, February 12, 2010 10:13 AM
Subject: Re: Tomcat dies suddenly


> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Carl,
>
> On 2/12/2010 7:20 AM, Carl wrote:
>> The 10,000 foot view:  new Dell T105 and T110, Slackware 13.0 (64 bit),
>> latest Java (64 bit) and latest Tomcat.  Machines only run Tomcat and a
>> small, special purpose Java server (which I have also moved to another
>> machine to make certain it wasn't causing any problems.)  Periodically,
>> Tomcat just dies leaving no tracks in any log that I have been able to
>> find. The application has run on a Slackware 12.1 (32 bit) for several
>> years without problems (except for application bugs.)  I have run
>> memTest86 for 30 hours on the T110 with no problems reported.
>>
>> All of the following trials have produced the same results:
>
> One last check: have you tried a 32-bit JVM running on either a 32-bit
> or 64-bit OS? Your memory needs are quire modest, so a 32-bit JVM should
> suffice. I think you mentioned that, in the past, on lesser hardware, a
> 32-bit JVM was being used.
>
>> The failures look a lot like the linux OOM killer (which Mark or Chris
>> said way back at the beginning which is now 2-3 months ago.)
>
> While the Linux OOM killer /is/ possible, I agree with Chuck that it's
> sounding less like a memory problem. I would have bet on a hardware
> problem, but memtest86 seems to have ruled that out (any x86 system I've
> suspected of having flaky hardware has always failed on it's first round
> of memtest86 testing). I wonder if there's a memtest_x64 that you should
> be trying, instead <shrug>.
>
> I honestly can't think of any other reason why Tomcat would be just
> dying with no trace: a clean shutdown would produce logs. The Linux OOM
> killer would say something in the system logs (you're not doing remote
> syslogging, and the message is somehow getting lost, are you?). A JVM
> bug would likely generate an hs_pid.log file with details of the crash.
>
> I have to admit, I'm stumped. :(
>
> - -chris
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