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From Peter Lin <tcw00l...@yahoo.com>
Subject RE: tomcat 4.1.18/24 unstable
Date Wed, 14 May 2003 18:56:13 GMT


be very careful with using -Xincgc.  In most cases, it
will cause the heap to grow faster. In my own
benchmarks, using test pages that read XML, -Xincgc
actually reduced the performance dramatically.

peter


--- Brent Andrewsen <BAndrewsen@novell.com> wrote:
> I am running with the -Xincgc flag, could that be
> crashing the JVM? Is
> anyone else out there runing JDK1.4.1.x on Sol 8
> successfully? If so
> could you post your kernel version from 'uname -a'
> output? ie.
> Generic_108528-11
>  
> Brent
>  
> 
> 
> >>> Yoav.Shapira@mpi.com 5/14/2003 8:41:15 AM >>>
> 
> 
> Howdy,
> We and several other people on the list run busy
> 24x7 production sites
> using tomcat standalone, various versions from 4.0.1
> to 4.1.24.  It so
> happens that we run a few on Solaris 8 like Mr.
> Andrewsen.  We haven't
> had any problems like what you describe.
> 
> Yoav Shapira
> Millennium ChemInformatics
> 
> 
> >-----Original Message-----
> >From: joseph lam [mailto:joseph.lam@quotepower.com]
> 
> >Sent: Wednesday, May 14, 2003 2:26 AM
> >To: Tomcat Users List
> >Subject: Re: tomcat 4.1.18/24 unstable
> >
> >I only had occasional freeze with 1.4.1_01 -server
> flag, but gone
> after
> >upgrading to _02.
> >
> >If this problem goes unsolved I will try Apache +
> jk2. Just wondering
> >how many people out there are running standalone
> tomcat for busy 24x7
> >production sites....this problem should be quite
> obvious but so far
> >nobody are paying attention to it.
> >
> >Joseph
> >
> >Brent Andrewsen wrote:
> >
> >>I too am seeing the same thing, and used a similar
> workaround.
> >>I'm running Sol 8, Tomcat 4.1.24.
> >>As another aside . . .  I was originally running
> JDK 1.4.1_02 and
> found
> >>that I was getting JVM crashes.
> >>Back-reving to the 1.4.0_2 seems to have fixed the
> crashes, but
> >>connections are still mounting.
> >>
> >>
> >>Brent
> >>
> >>
> >>
> >>
> >>
> >>>>>joseph.lam@quotepower.com 5/9/2003 3:29:29 AM
> >>>
> >>>>>
> >>>>>
> >>
> >>I also had the same problem with both 4.1.18 and
> 24. Now I resort to
> >>setting a high maxProcessor (e.g. 800) and restart
> the tomcat once
> the
> >>
> >>connections are reaching that. I also found that
> those 'ESTABLISHED'
> >>connections would stay forever eating up sockets
> and tomcat
> connectors.
> >>
> >>I've also tried to tune the ipv4 kernel settings
> for example to
> shorten
> >>
> >>the keep alive timeout but no luck.
> >>
> >>I'm using Redhat 7.3 and Sun JDK 1.4.1_02.
> >>
> >>Joseph
> >>
> >>Eric Roberts wrote:
> >>
> >>
> >>
> >>>We currently have secure web services deployed
> within tomcat 4.1.18
> >>>using axis.  We have 4 or 5 backend information
> providers
> submitting
> >>>information to the web service every 5 minutes. 
> Every so often I
> can
> >>>run a 'netstat -an | grep 8443' and see roughly
> 100+ connections
> with
> >>>the ESTABLISHED status.  It seems as though the
> connections are
> >>>
> >>>
> >>hanging
> >>>from the tomcat end.  Has anyone else experienced
> this?
> >>
> >>
> >>>( the limit of connections in tomcat is set to
> 100, time out is
> 20000
> >>>
> >>>
> >>in
> >>
> >>
> >>>server.xml )
> >>>
> >>>Thanks in advance
> >>>
> >>>
> >>>
> >>>
> >>>
> >>
> >>
>
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> >>
> >>
> >>
> >>
> >>
> >
> >
>
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> 
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