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Subject: RE: tomcat 5.5,
 jdk1.5 on user mode debian stable hangs after a few    days
Date: Tue, 2 Aug 2005 12:51:14 +0100
Message-ID: <5684A7E6FB10504393A2806C1F4C0210076CE1E2@orion.qas.com>
Thread-Topic: tomcat 5.5,
 jdk1.5 on user mode debian stable hangs after a few    days
Thread-Index: AcWXVV2uimaD/7zwQ6i0SroopXBlwAAAs5Yg
From: "Allistair Crossley" <Allistair.Crossley@QAS.com>
To: "Tomcat Users List" <tomcat-user@jakarta.apache.org>

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=20
> hangs after a
> few days
>=20
>=20
> no, the odd thing is, it wasnt even being used (and its a very simple=20
> application, of course, thats a relative term)
>=20
> i installed the app, tested it once and logged out.
>=20
> I came back to it a few days later and the whole thing is hanging.
>=20
> If you can recommed any tools i can use to detect what is=20
> happening that=20
> would be much appreciated
>=20
> the app itself uses spring, openamf (an open source flash remoting=20
> connector) with some jdbc (mysql)
>=20
> so i guess that any one of these (and my code) could be the culprit.
>=20
> I'll look into each of these individually and see if they could be=20
> causing the problem.
>=20
> thanks.
>=20
> martin
>=20
>=20
> Allistair Crossley wrote:
> > Hi,
> >=20
> > Hanging, memory up 50%, sounds very much like an=20
> OutOfMemoryException to me. I know from experience that=20
> Tomcat can hang with no memory and not log to stdout either=20
> (although most of the time it does).=20
> >=20
> > Have you profiled your application under a load test?
> >=20
> > Cheers, Allistair.
> >=20
> >=20
> >>-----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=20
> >>after a few
> >>days
> >>
> >>
> >>Hello,
> >>
> >>I've searched far and wide for a definitive answer to this=20
> >>problem, but=20
> >>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=20
> >>memory usage=20
> >>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
> >>
> >>------------------------------------------------------------
> ---------
> >>To unsubscribe, e-mail: tomcat-user-unsubscribe@jakarta.apache.org
> >>For additional commands, e-mail: tomcat-user-help@jakarta.apache.org
> >>
> >>
> >=20
> >=20
> >=20
> > <FONT SIZE=3D1 FACE=3D"VERDANA,ARIAL" COLOR=3DBLUE>=20
> > -------------------------------------------------------
> > QAS Ltd.
> > Registered in England: No 2582055
> > Registered in Australia: No 082 851 474
> > -------------------------------------------------------
> > </FONT>
> >=20
> >=20
> >=20
> ---------------------------------------------------------------------
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> >=20
> >=20
>=20
> ---------------------------------------------------------------------
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>=20
>=20

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