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From "Noam Camiel" <n...@mdrm.com>
Subject Re: tomcat jitters, then hangs - please help
Date Wed, 15 Oct 2003 10:37:07 GMT
Hi Euan

Please note the server is now up for 48 hours strait.
The change I've made is I've set LD_ASSUME_KERNEL to 2.2.5
I will update again in another 48 hours or if the server hangs, whichever
comes first.....

Regards,
Noam

----- Original Message -----
From: "Euan Guttridge" <EGuttridge@buildonline.com>
To: <noam@mdrm.com>
Sent: Wednesday, October 15, 2003 9:42 AM
Subject: FW: tomcat jitters, then hangs - please help


> Hi Noam,
>
> I work with Ryan on tomcat issues. I would be grateful if you would let me
> know if your tomcat installation is *still* up (another 24 hours) since
the
> NPTL change as below.
>
>
> Regards,
> Euan
>
> -----Original Message-----
> From: Noam Camiel [mailto:noam@mdrm.com]
> Sent: 14 October 2003 14:46
> To: Tomcat Users List
> Subject: Re: tomcat jitters, then hangs - please help
>
>
> Hi,
>
> On Friday, October 10, 2003 11:09 AM "Ryan Lissack"
> <rlissack@buildonline.com>  wrote:
>
> > Remy pointed out to me previously that RH9 uses a new form of threading
> and
> > based on this we have done some investigation.
> >
> > RH9 uses NTPL (Native POSIX Thread Library)
> > http://www.redhat.com/docs/manuals/linux/RHL-9-Manual/release-notes/x86/
> >
> > It is possible to revert to the older form of threading, "LinuxThreads",
> by
> > setting an environment variable, namely:
> > LD_ASSUME_KERNEL=<kernel-version>
> > - 2.4.1 - Linuxthreads with floating stacks
> > - 2.2.5 - Linuxthreads without floating stacks
> >
> > This does not revert back to an older kernel, it just changes the GNU C
> > library used http://www-106.ibm.com/developerworks/java/library/j-jtc/
> >
> > We will be testing with these settings starting today and, if we
continue
> to
> > have problems, we will be trying another distro.
>
> setting the LD_ASSUME_KERNEL variable, the server is now running over 24
> hours strait.
> Still, nothing conclusive as of yet......
> Ryan, thanks for the information above.  Do you have move information
> regarding this configuration? do you still encounter problems?
>
>
> On Monday, October 13, 2003 9:59 PM "Joe Zendle" <joe.zendle@vericept.com>
> wrote:
>
> > We had the same problem w/ TC 4.1.27, sun jvm 1.4.2 and redhat 9. The
> > thing wouldn't work for more than about 12 hours. IMHO, there are some
> > fundamental problems with tomcat as of late. Hate to say it but we
> > solved the problem by throwing away tomcat and using jetty! We are very
> > pleased so far. Jetty is very fast and about 1/3 the memory footprint.
> >
> > Good luck.
>
>
> Hi Joe,
> Thanks for sharing the info, I am considering what you suggest as well.
> As a last try before moving away from Tomcat, I'm trying out the
suggestion
> from Ryan above.
> Regards,
> Noam.
>
>
>
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