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From "Allistair Crossley" <Allistair.Cross...@QAS.com>
Subject RE: tomcat 5.5, jdk1.5 on user mode debian stable hangs after a few days
Date Tue, 02 Aug 2005 11:51:14 GMT
Hi,

You can get JProbe freeware for profiling and use JMeter to issue load to your web application.

Does the same phenoneneneneom occur with a vanilla Tomcat 5.5 install with included webapps
like jsp-examples. First figure out if it is your webapp that's causing it.

Allistair.

> -----Original Message-----
> From: MDK [mailto:mdk@relivethefuture.com]
> Sent: 02 August 2005 12:29
> To: Tomcat Users List
> Subject: Re: tomcat 5.5, jdk1.5 on user mode debian stable 
> hangs after a
> few days
> 
> 
> no, the odd thing is, it wasnt even being used (and its a very simple 
> application, of course, thats a relative term)
> 
> i installed the app, tested it once and logged out.
> 
> I came back to it a few days later and the whole thing is hanging.
> 
> If you can recommed any tools i can use to detect what is 
> happening that 
> would be much appreciated
> 
> the app itself uses spring, openamf (an open source flash remoting 
> connector) with some jdbc (mysql)
> 
> so i guess that any one of these (and my code) could be the culprit.
> 
> I'll look into each of these individually and see if they could be 
> causing the problem.
> 
> thanks.
> 
> martin
> 
> 
> Allistair Crossley wrote:
> > Hi,
> > 
> > Hanging, memory up 50%, sounds very much like an 
> OutOfMemoryException to me. I know from experience that 
> Tomcat can hang with no memory and not log to stdout either 
> (although most of the time it does). 
> > 
> > Have you profiled your application under a load test?
> > 
> > Cheers, Allistair.
> > 
> > 
> >>-----Original Message-----
> >>From: MDK [mailto:mdk@relivethefuture.com]
> >>Sent: 02 August 2005 10:23
> >>To: tomcat-user@jakarta.apache.org
> >>Subject: tomcat 5.5, jdk1.5 on user mode debian stable hangs 
> >>after a few
> >>days
> >>
> >>
> >>Hello,
> >>
> >>I've searched far and wide for a definitive answer to this 
> >>problem, but 
> >>have found nothing that relates to my situation.
> >>
> >>I did find a few similar issues, but
> >>
> >>1. I have no System.exit in my code
> >>2. I am not using the root context
> >>
> >>and still after a few days tomcat stops responding.
> >>
> >>The problem also doesnt go away after i stop and re-start tomcat.
> >>
> >>And occasionally it wont stop with ./bin/shutdown.sh
> >>
> >>so i have to kill -9 the first process to stop it.
> >>
> >>when it is running, the CPU usage runs at over 90% and the 
> >>memory usage 
> >>goes up to 50% or so.
> >>
> >>It doesnt even respond when i telnet to localhost 8080.
> >>
> >>does anyone know a viable fix for this problem ?
> >>
> >>thanks,
> >>
> >>martin
> >>
> >>------------------------------------------------------------
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> >>
> >>
> > 
> > 
> > 
> > <FONT SIZE=1 FACE="VERDANA,ARIAL" COLOR=BLUE> 
> > -------------------------------------------------------
> > QAS Ltd.
> > Registered in England: No 2582055
> > Registered in Australia: No 082 851 474
> > -------------------------------------------------------
> > </FONT>
> > 
> > 
> > 
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> > 
> > 
> 
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> 

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