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Posted to users@tomcat.apache.org by Ghulam_Hussain <gh...@yahoo.com> on 2008/06/02 11:28:12 UTC
BLACK ZONE alert on Stopping Tomcat Server
I have configured multiple tomcat servers on a remote linux machine, and
monitors linux applications through Virtuozzo.
When I shutdown the TomcatA while TomcatB is running, the Virtuozzo shows
the Black Zone alert (indicating that linux server is in serious state,
related to system memory).
Similarly when I shutdown TomcatB while TomcatA is running, the same problem
occurs.
But when the one Tomcat server is already stopped, and other Tomcat server
is shutdown, then no problem occurs.
Any clue, that why Black Zone alert occurs.................or the Tomcat
servers uses each other resources while being shutdown.
Any help will be appreciated....
--
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RE: BLACK ZONE alert on Stopping Tomcat Server
Posted by Martin Gainty <mg...@hotmail.com>.
Is there any way to tune and or configure the individual VPS parameters to respect JVM memory parameters ?
for example JAVA_OPTS could be
-Xms256m -Xmx512m -XX:MaxPermSize=512m
(for example the equivalent VMWare configuration settings)
http://kb.vmware.com/selfservice/microsites/search.do?cmd=displayKC&docType=kc&externalId=1004059&sliceId=1&docTypeID=DT_KB_1_1&dialogID=67462400&stateId=0%200%2067460275
Thank You
Martin
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> Date: Mon, 2 Jun 2008 08:05:37 -0700
> From: gabrielw@ngasi.com
> To: users@tomcat.apache.org
> Subject: Re: BLACK ZONE alert on Stopping Tomcat Server
>
> Hi Ghulam,
> Virtuozzo, is an OS level based VPS. Which means available system
> resources are shared between the VPS.
> During Shutdown, a Java process is created; this in turn utilizes a
> burst of RAM. So at that moment you have
> 3 JVMs running - TomcatA, TomcatB, and ShutdownA. That 3rd JVM may be
> stretching the available resources
> on your System. Now after TomcatA is completely shutdown, when you go to
> shutdown TomcatB,
> at that particular moment you have 2 JVMS (TomcatB,ShutdownB), which
> your system is able to easily handle.
> It is essentially a matter of available system RAM. You may want to
> increase the RAM.
>
> Ghulam_Hussain wrote:
> > I have configured multiple tomcat servers on a remote linux machine, and
> > monitors linux applications through Virtuozzo.
> >
> > When I shutdown the TomcatA while TomcatB is running, the Virtuozzo shows
> > the Black Zone alert (indicating that linux server is in serious state,
> > related to system memory).
> >
> > Similarly when I shutdown TomcatB while TomcatA is running, the same problem
> > occurs.
> >
> > But when the one Tomcat server is already stopped, and other Tomcat server
> > is shutdown, then no problem occurs.
> >
> > Any clue, that why Black Zone alert occurs.................or the Tomcat
> > servers uses each other resources while being shutdown.
> >
> > Any help will be appreciated....
> >
>
>
> --
> Regards
>
> Gabe Wong
> NGASI AppServer Manager
> JAVA AUTOMATION and SaaS Enablement
> http://www.ngasi.com
> NEW! 8.1 - Centrally manage Application Servers across multiple physical servers
>
>
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> To start a new topic, e-mail: users@tomcat.apache.org
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
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>
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Re: BLACK ZONE alert on Stopping Tomcat Server
Posted by Gabe Wong <ga...@ngasi.com>.
Hi Ghulam,
Virtuozzo, is an OS level based VPS. Which means available system
resources are shared between the VPS.
During Shutdown, a Java process is created; this in turn utilizes a
burst of RAM. So at that moment you have
3 JVMs running - TomcatA, TomcatB, and ShutdownA. That 3rd JVM may be
stretching the available resources
on your System. Now after TomcatA is completely shutdown, when you go to
shutdown TomcatB,
at that particular moment you have 2 JVMS (TomcatB,ShutdownB), which
your system is able to easily handle.
It is essentially a matter of available system RAM. You may want to
increase the RAM.
Ghulam_Hussain wrote:
> I have configured multiple tomcat servers on a remote linux machine, and
> monitors linux applications through Virtuozzo.
>
> When I shutdown the TomcatA while TomcatB is running, the Virtuozzo shows
> the Black Zone alert (indicating that linux server is in serious state,
> related to system memory).
>
> Similarly when I shutdown TomcatB while TomcatA is running, the same problem
> occurs.
>
> But when the one Tomcat server is already stopped, and other Tomcat server
> is shutdown, then no problem occurs.
>
> Any clue, that why Black Zone alert occurs.................or the Tomcat
> servers uses each other resources while being shutdown.
>
> Any help will be appreciated....
>
--
Regards
Gabe Wong
NGASI AppServer Manager
JAVA AUTOMATION and SaaS Enablement
http://www.ngasi.com
NEW! 8.1 - Centrally manage Application Servers across multiple physical servers
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